Tag: plant diseases

Soybean rust threatens soybean production in Malawi and Zambia

Written by Julian Bañuelos-Uribe on January 25, 2024. Posted in Blogs.

Healthy soybean fields. (Photo: Peter Setimela/CIMMYT)

Soybeans are a significant source of oil and protein, and soybean demand has been increasing over the last decade in Malawi and Zambia. Soybean contributes to human nutrition, is used in producing animal feed, and fetches a higher price per unit than maize, thus serving as a cash crop for smallholder farmers. These are among the main factors contributing to the growing adoption of soybean among smallholder producers. In addition, soybean is a vital soil-fertility improvement crop used in crop rotations because of its ability to fix atmospheric nitrogen. To a large extent, soybean demand outweighs supply, with the deficit covered by imports.

Soybean production in sub-Saharan Africa is expected to grow by over 2% per annum to meet the increasing demand. However, as production increases, significant challenges caused by diseases, pests, declining soil fertility, and other abiotic factors remain. According to official government statistics, Zambia produces about 450,000 tonnes of soybean per annum, with an estimated annual growth of 14%. According to FAOSTAT, this makes Zambia the second largest soybean producer in the southern African region. Although soybean was traditionally grown by large commercial farmers in Zambia, smallholders now account for over 60% of the total annual soybean production.

Production trends show that smallholder soybean production increased rapidly in the 2015–2016 season, a period that coincided with increased demand from local processing facilities. As smallholder production continued to increase, in 2020, total output by smallholder farmers outpaced that of large-scale farmers for the first time and has remained dominant over the last two seasons (Fig 1). However, soybean yields among smallholder farmers have remained low at around 1 MT/HA.

Figure 1. Soybean production trends by smallholders and large-scale farmers. (Photo: Hambulo Ngoma/Zambia Ministry of Agriculture, Crop Forecast Survey)

Soybean production in the region is threatened by soybean rust caused by the fungus Phakopsora pachyrhizi. The rust became prevalent in Africa in 1996; it was first confirmed in Uganda on experimental plots and subsequently on farmers’ fields throughout the country. Monitoring efforts in the U.S. have saved the soybean industry millions of dollars in fungicide costs due to the availability of accurate disease forecasting based on pathogen surveillance and environmental data.

Soybean rust disease is spread rapidly and easily by wind, and most available varieties grown by farmers are susceptible. The above-normal rainfall during the 2022–2023 season was conducive to the spread of the fungus. A recent survey of over 1,000 farm households shows that 55% and 39% of farmers in Zambia and Malawi, respectively, were affected by soybean rust during the 2022–2023 season. The lack of rust-tolerant varieties makes production expensive for smallholder farmers who cannot afford to purchase fungicides to control the pathogens. It is estimated that soybean rust can cause large yield losses of up to 90%, depending on crop stage and disease severity. Symptoms due to soybean rust infection may be observed at any developmental stage of the plant, but losses are mostly associated with infection from the flowering stage to the pod-filling stage.

Soybean plants affected by soy rust. (Photo: Peter Setimela)

Mitigation measures using resistant or tolerant varieties have been challenging because the fungus mutates very rapidly, creating genetic variability. Although a variety of fungicides effective against soybean rust are available, the use of such fungicides is limited due to the high cost of the product and its application, as well as to environmental concerns. Due to this restricted use of fungicide, an early monitoring system for detecting rust threats for steering fungicide might only be relevant for large-scale producers in eastern and southern Africa. With the massive increase in the area under soybean production, soybean rust is an important disease that cannot be ignored. Host-plant resistance provides a cheaper, more environmentally friendly, and much more sustainable approach for managing soybean rust in smallholder agriculture that characterizes the agricultural landscape of eastern and southern Africa.

To advance the use of rust-tolerant varieties, the Southern Africa Accelerated Innovation Delivery Initiative (AID-I) Rapid Delivery Hub, or MasAgro Africa, is presently concluding surveys to assess farmers’ demand and willingness to pay for rust-tolerant varieties in Malawi and Zambia. The results from this assessment will be valuable to seed companies and last-mile delivery partners to gain a better understanding of what farmers need and to better serve the farmers. This coming season AID-I will include rust tolerant varieties in the mega-demonstrations to create awareness about new varieties that show some tolerance to rust.

Plant Health Innovation Platform at Kiboko, Kenya: integrating and testing eco-friendly solutions against fall armyworm

Written by Susan Otieno on March 6, 2023. Posted in News.

Smallholder farmers and agricultural extension officers assessing Integrated Pest Management Packages (IPMs) treatments against fall armyworm at the Plant Health Innovation Platform at the KALRO Kiboko Research Station in Kenya. (Photo: Peter Kinyumu/CIMMYT)

CGIAR’s Plant Health Initiative (PHI) is testing integrated pest management (IPM) packages against fall armyworm (FAW) in partnership with smallholder farmers and agricultural extension officers at the Plant Health Innovation Platform at the Kenya Agricultural and Livestock Research Organization (KALRO) Kiboko Research Station in Kenya.

The IPM packages comprise 18 combinations of treatments, including maize varieties with native genetic resistance to FAW, biopesticides, biological control agents, push-pull system, and bean varieties.

“This is a unique opportunity to identify eco-friendly and cost-effective IPM packages against a major pest like FAW through participatory engagement of smallholder farmers and extension personnel,” said BM Prasanna, Global Maize Program Director at the International Maize and Wheat Improvement Center (CIMMYT) and CGIAR Plant Health Initiative Lead. “Also In our efforts against FAW, three FAW-tolerant maize hybrids have been recommended for release after national performance trials in Kenya.”

CIMMYT Global Maize Program Director and CGIAR Plant Health Initiative Lead, BM Prasanna explaining to smallholder farmers and agricultural extension officers; CGIAR’s Plant Health Initiative (PHI) testing of integrated pest management (IPM) packages against fall armyworm (FAW) at KALRO Kiboko, Kenya. (Photo: Susan Otieno/CIMMYT)

Participatory assessment

Participating farmers and extension personnel made their first assessment of the IPM combinations at the vegetative stage on November 8, 2022.

“With this second assessment on February 7, 2023, farmers and extension personnel are evaluating the same IPM combinations for their yield potential, which means the plants need to be not only healthy but also productive. The farmers are also looking at the quality of the maize ears, and the level of ear and kernel damage by the pest, if any. These assessments both at the vegetative and reproductive stages are critical for us to conclude this experiment and draw appropriate inferences,” Prasanna said.

Researchers will analyze the efficacy of the scoring of different IPM treatments by the farmers and from the vegetative/foliar and reproductive/harvest stages. In addition, scientists will conduct a cost-benefit analysis for each IPM treatment to identify relevant IPM packages that can be potentially scaled. Prasanna noted the initial scoring by the scientists and farmers were highly comparable.

The trials engaged farmers and extension workers from five different counties in Kenya. “The Plant Health Initiative is keen on co-creation and co-validation and taking an inclusive, participatory approach to innovations,” said Prasanna. He added that such an approach is vital for buy-in by the farmers, who need to be active partners in effectively scaling the selected IPM packages.

Farmers participating in the Field Day at the Innovation Platform applauded the initiative to involve them in validating solutions to manage FAW and expressed their eagerness to have the innovations in their hands. The farmers also had opportunities to ask questions, provide preliminary verbal feedback, and receive immediate clarification from the scientists to their queries.

”I know a farmer who has trained his two sons to go to every plant and kill the armyworm physically. You can imagine the time and energy that takes,” said Justice Kimeu, a farmer from Makueni County, Kenya. “Let the innovative methods we have seen here reach every farmer across the country.”

A participant giving his preliminary observations on the Integrated Pest Management Packages (IPMs) treatments against fall armyworm at the Plant Health Innovation Platform at the KALRO Kiboko Research Station in Kenya. (Photo by Peter Kinyumu/CIMMYT)

Plant Health Innovation Platform catalyzes collaboration

The Plant Health Innovation Platform at Kiboko brings together different innovations developed by the collaborating institutions: CIMMYT, KALRO, International Center for Insect Physiology and Ecology (icipe), AgBiTECH, Center for Agriculture and Bioscience International (CABI), and Farmfix Africa.

“Robust data is being generated on the efficacy and cost-benefit of various IPM combinations. After data analysis, 2-3 few specific IPM packages will be identified based on efficacy against FAW, cost effectiveness, affordability to smallholder farmers, and potential for rapid scale up,” Prasanna said.

Besides the FAW Innovation Platform at Kiboko, Kenya, the CGIAR Plant Health Initiative is operating eight other Innovation Platforms in Benin, Cameroon, Nigeria, Uganda, Lebanon, Philippines, Ecuador, and Colombia. Each of these platforms bring together diverse institutions engaged in developing game-changing solutions in managing key pests and diseases in the Initiative’s primary crops that include maize, banana, cassava, potato, sweet potato, rice, yam, sorghum, wheat, millets, legumes, and vegetables.

Is uptake of rust-resistant wheat linked to gender equality?

Written by Sarah McLaughlin on October 10, 2022. Posted in News.

Sieg Snapp presents research on agroecological approaches to maize farming in Malawi and Zimbabwe at Tropentag 2022. (Photo: Ramiro Ortega Landa/CIMMYT)

Farmers, development practitioners and scientists gathered at Tropentag 2022 between September 14-16 to answer a question that will affect all our futures: can agroecological farming feed the world?

Tropentag is an annual interdisciplinary conference on research in tropical and subtropical agriculture, natural resource management and rural development, jointly organized by nine European universities and the Council for Tropical and Subtropical Agricultural Research (ATSAF e.V), in cooperation with the GIZ Fund International Agricultural Research (FIA).

This year’s event explored the potential of agroecology to contribute to improved nutrition, enhanced natural resource management and farm incomes.

Sieg Snapp, Director of the Sustainable Agrifood Systems (SAS) program at the International Maize and Wheat Improvement Center (CIMMYT) presented on agroecology approaches to enhance learning in a changing world based on experiences with maize-based cropping systems in southern Africa. Snapp suggested that accelerated learning and adaptative capacity are key to the local generation of suitable solutions to agricultural problems, and proposed agroecology as a foundational approach that emphasizes understanding principles, harnessing biological processes, and enhancing local capacity.

Snapp shared how an agroecology living laboratory in Malawi has supported farmer agency around soil health, crop diversification and sustainable intensification since 2013, while living labs are being established in “food territories” in Zimbabwe to support innovation and strategies for evaluating the benefits of farm-scale agroecology approaches. She also explored solutions for pest management, inclusive financing modalities and collaborative innovation generation between farmers and researchers.

Gender and disease-resistant varieties

Michael Euler, Agricultural Resource Economist at CIMMYT, presented in the conference session on technology adoption and dissemination for smallholder farms, which included contributions on the adoption and impact of improved forage production, use of biogas facilities, agroecological management practices, improved wheat seeds, and access to and use genetic diversity in gene banks.

Based on data from CIMMYT’s Accelerating Genetic Gains in Maize and Wheat (AGG) project in Ethiopia, Euler presented a study on how intra-household decision-making dynamics influence the adoption of rust-resistant wheat varieties.

By using questionnaires that were addressed separately to male and female spouses in the household, researchers obtained insights on perceived individual roles in decision-making and agreements. The study found that an increase in the role of the female spouse in household farming decisions is positively associated with the uptake of rust-resistant varieties.

Additional sessions from the event focused on crops and cropping systems, animal production systems, food security and nutrition, agroecology, and food processing and quality.

AGG-Maize project registers impressive progress

Written by Susan Otieno on October 4, 2022. Posted in News.

Participants of the AGG Maize Mid-Term Review and Planning Meeting at CIMMYT’s Maize Lethal Necrosis Screening Facility in Naivasha, Kenya. (Photo: Dokta Jonte Photography)

The Accelerating Genetic Gains in Maize and Wheat (AGG) Project, which is halfway through its implementation, continues to register impressive achievements. At a meeting focusing on the project’s Maize component, held in Nairobi during July 25-28, B.M. Prasanna, Director of the Global Maize Program at the International Maize and Wheat Improvement Center (CIMMYT), highlighted the project’s major achievements in the opening session.

“One of the most important achievements of this project is increasing use of powerful tools and technologies to increase genetic gains in maize breeding pipelines in Africa,” said Prasanna. He noted that the AGG partners are showing keen interest in doubled haploid-based maize breeding. Prasanna pointed out that currently work is ongoing to produce third-generation tropicalized haploid inducers which, in combination with molecular markers, will support accelerated development of improved maize germplasm, a key objective of the AGG Project.

Prasanna also pointed out a significant increase in adoption of stress-tolerant maize in Africa – from less than half a million hectares cultivated under stress tolerant maize varieties in 2010, to 7.2 million hectares currently in 13 African countries, benefitting 44.5 million people. He explained that drought-tolerant maize is not only a productivity enhancing tool but also an innovation for improving the welfare of farmers. “It reduces the probability of crop failure by 30 percent and provides an extra income to farmers at a rate of approximately $240 USD per hectare, equivalent to about nine months of food for a family at no additional cost,” he said, adding that the essence of research is taking improved genetics to farmers and impacting their lives.

He noted there is remarkable progress in maize varietal turnover in sub-Saharan Africa, pointing out particularly efforts in Ethiopia, Uganda, Zambia and Zimbabwe, where old maize varieties, some dating as far back as 1988, have been replaced with newer climate-resilient varieties. Prasanna highlighted the need to engage with policy makers to put in place appropriate legislation that can accelerate replacement of old or obsolete varieties with improved genetics.

Prasanna stressed on the importance of rapid response to transboundary diseases and insect-pests. CIMMYT has established fall armyworm (FAW) screening facility at Kiboko, Kenya, and that more than 10,000 maize germplasm entries have been screened over the last three years. He applauded South Sudan for being the first country in sub-Saharan Africa to recently release three CIMMYT-developed FAW-tolerant hybrids. He said CIMMYT’s FAW-tolerant inbred lines have been shared with 92 institutions, both public and private, in 34 countries globally since 2018.

Kevin Pixley, CIMMYT Global Genetic Resources Director and Deputy Director General, Breeding and Genetics, encouraged the participants to continuously reflect on making innovative contributions through the AGG project, to serve smallholder farmers and other stakeholders, and to offer sustainable solutions to the food crisis that plagues the world.

B.M. Prasanna addresses partners at the KALRO Kiboko Research station in Kenya during an AGG field visit. (Photo: Dokta Jonte Photography)

Synergies across crops and teams

Pixley pointed out that though the meeting’s focus was on maize, the AGG Project has both maize and wheat components, and the potential for learning between the maize and wheat teams would benefit many, especially with the innovative strides in research from both teams.

Pixley referenced a recent meeting in Ethiopia with colleagues from the International Institute of Tropical Agriculture (IITA), the International Center for Tropical Agriculture (CIAT) and CIMMYT, where discussions explored collaboration among CGIAR centers and other stakeholders in strengthening work on cowpea, chickpea, beans, sorghum, millet and groundnut crops. He noted that maize, wheat and the aforementioned crops are all critical in achieving the mission of CGIAR.

“CIMMYT has been requested, since August of last year, by CGIAR to initiate research projects on sorghum, millet and groundnut because these crops are critical to the success of achieving the mission of CGIAR,” said Pixley. “So, we have recently initiated work on the Accelerated Varietal Improvement and Seed Systems in Africa (AVISA) project together with partners. This is the first step towards OneCGIAR. It’s about synergies across crops and teams.”

Collaborative research commended

The meeting’s Chief Guest, Felister Makini, Deputy Director General – Crops of the Kenya Agricultural and Livestock Research Organisation (KALRO), commended the collaborative research undertaken by CIMMYT and other CGIAR partners. She noted that the partnerships continue to build on synergies that strengthen institutional financial, physical and human resources. She attested that collaboration between KALRO and CGIAR dates back to the 1980s, beginning with training in maize breeding, and then subsequent collaboration on developing climate-adaptive improved maize varieties and training of KALRO technicians in maize lethal necrosis (MLN) screening and management among other areas.

Maize and wheat are staple food sources in Kenya and sub-Saharan Africa and as the population increases, new methods and approaches must be found to accelerate development and deployment of improved maize and wheat varieties. She challenged the partners to intensify research and come out with high-yielding varieties that are resistant or tolerant to a wide range of biotic and abiotic stresses.

The Inaugural Session also featured remarks from the representatives of the AGG funders – Gary Atlin from the Bill & Melinda Gates Foundation, Jonna Davis from the Foundation for Food and Agriculture Research (FFAR), and John Derera from IITA, an AGG project partner.

A total of 116 participants, including representatives from National Agricultural Research Systems (NARS) in 13 AGG-Maize partner countries in Africa and seed companies, participated in the meeting. Participants also visited the KALRO-CIMMYT MLN Screening Facility at Naivasha, and KALRO-CIMMYT maize experiments at Kiboko, Kenya, including the work being done at the maize doubled haploid and FAW facilities.

Researchers take part in Wheat Blast screening and surveillance course in Bangladesh. (Photo: CIMMYT/Tim Krupnik)

Weather data and crop disease simulations can power predictions of wheat blast outbreaks, new study shows

Written by Mike Listman on September 26, 2022. Posted in Publications.

Cutting-edge models for crops and crop diseases, boosted by high-resolution climate datasets, could propel the development of early warning systems for wheat blast in Asia, helping to safeguard farmers’ grain supplies and livelihoods from this deadly and mysterious crop disease, according to a recent study by scientists at the International Maize and Wheat Improvement Center (CIMMYT).

Originally from the Americas, wheat blast shocked farmers and experts in 2016 by striking 15,000 hectares of Bangladesh wheat fields, laying waste to a third of the crops. The complex interactions of wheat and the fungus, Magnaporthe oryzae pathotype Triticum (MoT), which causes blast, are not fully understood. Few current wheat varieties carry genetic resistance to it and fungicides only partly control it. Warm temperatures and high humidity favor MoT spore production and spores can fly far on winds and high-altitude currents.

Mean potential wheat blast disease infections (NPI) across Asia, based on disease and crop infection model simulations using air temperature and humidity data from 1980-2019. Black dots represent wheat growing areas with presumably unsuitable climates for wheat blast. The x and y axes indicate longitude and latitude.

“Using a wheat blast infection model with data for Asia air temperatures and humidity during 1980-2019, we found high potential for blast on wheat crops in Bangladesh, Myanmar, and areas of India, whereas the cooler and drier weather in countries such as Afghanistan and Pakistan appear to render their wheat crops as unlikely for MoT establishment,” said Carlo Montes, a CIMMYT agricultural climatologist and first author of the paper, published in the International Journal of Biometeorology. “Our findings and approach are directly relevant for work to strengthen monitoring and forecasting tools for wheat blast and other crop diseases, as well as building farmers’ and agronomists’ disease control capacity.”

Montes emphasized the urgency of those efforts, noting that some 13 million hectares in South Asia are sown to wheat in rotation with rice and nearly all the region’s wheat varieties are susceptible to wheat blast.

Read the full study: Variable climate suitability for wheat blast (Magnaporthe oryzae pathotype Triticum) in Asia: Results from a continental‑scale modeling approach

Cover photo: Researchers take part in a wheat blast screening and surveillance course in Bangladesh. (Photo: CIMMYT/Tim Krupnik)

Drought-tolerant maize and use of forecasting in agriculture praised by the Bill & Melinda Gates Foundation

Written by Sarah McLaughlin on September 21, 2022. Posted in Features.

The work of maize and wheat scientists at CGIAR and the International Maize and Wheat Improvement Center (CIMMYT) has been featured in the latest Goalkeepers report from the Bill & Melinda Gates Foundation, which launches with the Global Goals Awards on September 20 and an open-to-all live-streamed event on September 21.

In analysis of why the Ukraine crisis is heavily impacting Africa, the report’s introduction from Bill Gates delves into reasons behind reliance on crop imports. Most farmers in Africa are smallholders with small plots of land and have limited capacity to use fertilizers or have access to irrigation. This means that any shock to the food system, such as the disruption to the global supply chain caused by the Ukraine conflict, hugely impacts the yield levels, threatening food and nutritional security.

Conflict is not the only risk to food systems in Africa. Climate change is the most prominent challenge that the continent’s smallholder farmers continue to face.

Developed through support from the Bill & Melinda Gates Foundation, DroughtTego, a CIMMYT-derived hybrid maize with increased resistance to hotter, drier climates, produces an average of 66% more grain per acre in Kenya. Scaled through public-private partnerships, DroughtTego seeds can increase farmer income by providing more than enough to feed a family of six for an entire year, enabling them to invest the additional money in sending their children to school or building new homes.

CIMMYT and CGIAR scientists have also been using predictive modeling to speed up plant breeding and develop new varieties that can perform well even in drought stress-prone environments of Africa. Artificial intelligence helps in processing the genomic information of crops alongside the environmental data, such as soil samples and satellite imagery. The results create a vision of what farms will need to look like in the future, enabling scientists to determine which type of crop varieties can better succeed in specific locations.

Predictive epidemiological modeling can highlight where plant diseases, such as wheat rust, may possibly spread. An early warning system, developed by a partnership between CIMMYT, the University of Cambridge, the UK Met Office, the Ethiopian Agricultural Research Institute (EIAR), the Agricultural Transformation Institute (ATI) and the Ethiopian Ministry of Agriculture, successfully alerted farmers in Ethiopia to an outbreak of the disease so that they could take preventive measures. The resulting outcome was the country’s largest wheat harvest ever recorded, instead of a devastating rust epidemic.

A LinkedIn post from Bill Gates also emphasized CIMMYT’s research, asking which crop accounts for around 30% of calorie intake for people in sub-Saharan Africa — the answer being “maize”.

Inclusion in this report highlights the global impact of CIMMYT’s work on farmers and world food systems, which is only possible through successful partnerships with organizations like the Bill & Melinda Gates Foundation.

Cover photo: A farmer in Zaka District, Zimbabwe, experiences a drought that could affect crop yields. (Photo: Johnson Siamachira/CIMMYT)

Greenhouse upgrades at BWMRI for wheat blast research

Written by Sarah McLaughlin on September 8, 2022. Posted in News.

Md. Sayedul Islam inaugurated the greenhouse complex along with Golam Faruq and Md. Benojir Alam. (Credit: Timothy J. Krupnik/CIMMYT)

A new greenhouse complex, built with financial support from the International Maize and Wheat Improvement Center (CIMMYT), at the Bangladesh Wheat and Maize Research Institute (BWMRI) was inaugurated on 13 August 2022. The greenhouse was built at BWMRI’s headquarters in Dinajpur, Bangladesh.

This complex has a room for generator, a sample preparation room and space for a small laboratory. These upgrades will add new momentum for greenhouse activities and BWMRI and CIMMYT scientists designed the facility to accommodate wheat scientists from Bangladesh and other countries.

The BWMRI has been working to combat wheat blast disease since 2016, with financial and technical support from CIMMYT and other investors. CIMMYT has also assisted the Government of Bangladesh in developing an early warning system for wheat blast.

Because of the challenging phenology of synthetic wheat and introductions from winter and facultative wheat zones, field condition evaluation of these germplasm is difficult and the greenhouse will help ease this hurdle. Additionally, several pathological experiments investigating the biology of wheat blast will now be able to be performed in the new greenhouse facility.

Supplementary activities at the greenhouse include disease screening and research into unlocking the genetics of host resistance. The installation of a diesel generator will keep the greenhouse running in case of power outages.

Visitors to the newly constructed greenhouse at the Bangladesh Wheat and Maize Research Institute. (Credit: Rezaul Kabir/BWMRI)

Md. Sayedul Islam, Secretary of the Ministry of Agriculture, inaugurated the greenhouse complex. Additional attendees at the opening included Shaikh Mohammad Bokhtiar, Executive Chairman of the Bangladesh Agricultural Research Council (BARC), Golam Faruq, Director General of BWMRI, Mirza Mofazzal Islam, Director General of the Bangladesh Institute of Nuclear Agriculture (BINA), Debasish Sarker, Director General of the Bangladesh Agricultural Research Institute (BARI), Md. Benojir Alam, Director General of the Department of Agricultural Extension (DAE), and Md. Abdul Wadud, Executive Director and Additional Secretary at the Bangladesh Institute of Research and Training on Applied Nutrition (BIRTAN). Timothy J. Krupnik, country representative of CIMMYT in Bangladesh, was also present.

CGIAR Plant Health Initiative formally launched on the International Day of Plant Health

Written by Susan Otieno on June 30, 2022. Posted in News.

National, regional, and international partners at the CGIAR Plant Health and Rapid Response to Protect Food Security and Livelihoods Initiative launch in Nairobi, Kenya, on May 12, 2022. (Credit: Susan Otieno)

CGIAR together with national, regional, and international partners kicked off the Plant Health and Rapid Response to Protect Food Security and Livelihoods Initiative also known as the Plant Health Initiative in Nairobi, Kenya, on May 12-13, 2022. The Initiative’s inception meeting was fittingly held on the first-ever International Day of Plant Health on May 12 and was attended by over 200 participants (both in-person and virtual), representing diverse institutions.

The Plant Health Initiative targets a broad range of pests and diseases affecting cereals (especially rice, wheat and maize) and legumes such as beans, faba bean, chickpea, lentil, and groundnut; potato; sweet potato; cassava; banana; and other vegetables.

Speaking at the meeting, CGIAR Plant Health Initiative Lead and Director of Global Maize Program at the International Maize and Wheat Improvement Center (CIMMYT) noted that climate change, together with human activities and market globalization, is aggravating challenges to plant health, including outbreaks of devastating insect-pests and diseases. In addition, according to data from the African Union Partnership on Aflatoxin Control in Africa (AUC-PACA), 40 percent of commodities in local African markets exceed allowable levels of mycotoxins in food, causing adverse effects on diverse sectors, including agriculture, human health, and international trade.

“The CGIAR Plant Health Initiative is, therefore, a timely program for strengthening inter-institutional linkages for effective plant health management especially in the low- and middle-income countries in Africa, Asia, and Latin America, said Prasanna. “This calls for synergizing multi-stakeholder efforts to improve diagnostics, monitoring and surveillance, prediction and risk assessment of transboundary pests and pathogens, and implementing integrated pest and disease management in a gender-responsive and socially inclusive manner.”

Demand-driven multistakeholder approach

CGIAR Global Science Director for Resilient Agrifood Systems Martin Kropff reiterated the importance of the Initiative, and emphasized the need for a global plant health research-for-development consortium. He mentioned that all the CGIAR Initiatives, including the Plant Health Initiative, are demand-driven and will work closely with national, regional, and international partners for co-developing and deploying innovative solutions.

The chief guest at the event, Oscar Magenya, Secretary of Research and Innovation at Kenya’s Ministry of Agriculture, pointed out the need for a well-coordinated, multisectoral and multistakeholder approach to managing invasive pests and diseases. He recognized CGIAR’s contribution and partnership with the Government of Kenya through CIMMYT, especially in combating maize lethal necrosis and wheat rust in Kenya.

“As government, we invite the CGIAR Plant Health Initiative to partner with us in implementing the Migratory and Invasive Pests and Weeds Management Strategy that was launched recently [by the Kenya Government],” said Magenya.

Implications of Plant Health in Africa and globally

Zachary Kinuya, Director of Crop Health Program at the Kenya Agricultural and Livestock Research Organisation (KALRO) spoke on the importance of plant health management to African stakeholders, and observed that in addition to improved crop production, food and feed safety must be given adequate priority in Africa.

Director of the Plant Production and Protection Division at the UN Food and Agriculture Organization (FAO), Jingyuan Xia applauded CGIAR for launching the global Initiative. Through his virtual message, Xia stated that the goals of the two organizations are aligned towards supporting farmers and policy makers in making informed decisions and ultimately ending global hunger. He added that the CGIAR has strong research capacity in developing and disseminating new technologies.

CIMMYT Director General Bram Govaerts explained how negative impacts on plant health, combined with climate change effects, can lead to global production losses and food system shocks, including the potential to result in food riots and humanitarian crises. He challenged stakeholders in the meeting to resolve tomorrow’s problems today, through collective and decisive action at all levels.

Sarah M. Schmidt, Fund International Agriculture Research Advisor_GIZ Germany making a contribution during the Launch of the Plant Health Initiative. (credit Susan Otieno/CIMMYT)

The German development agency (GIZ) Fund International Agricultural Research (FIA) Advisor Sarah Schmidt said that GIZ supports the Initiative because of its interest in transformative approaches in innovations for sustainable pest and disease management. Recognizing women’s major involvement in farming in Africa, Schmidt said there is a need to empower and equip women with knowledge on plant health as this will result to greater productivity on farms in Africa. “We welcome that the Plant Health Initiative dedicated an entire crosscutting work package to equitable and inclusive scaling of innovations,” she added.

Participants at the launch were also reminded by Ravi Khetarpal, Executive Secretary of the Asia-Pacific Association of Agricultural Research Institutions (APAARI), that the Initiative is now at the critical phase of Implementation and requires diverse actors to tackle different issues in different geographies. Ravi added that biosecurity and plant health are important subjects for the Asia-Pacific region, in view of the emergence of new pests and diseases, and therefore the need to save the region from destructive pest incursions.

Other online speakers at the launch included Harold Roy Macauley, Director General of AfricaRice & CGIAR Regional Director, Eastern and Southern Africa; Nteranya Sanginga, Director General of the International Institute of Tropical Agriculture (IITA) and CGIAR Regional Director, West and Central Africa; and Joaquin Lozano, CGIAR Regional Director, Latin America & the Caribbean.

Reflecting on gender, social inclusion, and plant health

Panel discussions allowed for more in-depth discussion and recommendations for the Initiative to take forward. The panelists delved into the progress and challenges of managing plant health in the Global South, recommending a shift from a reactive to a more proactive approach, with strong public-private partnerships for sustainable outcomes and impacts.

Gender inequities in accessing the plant health innovations were also discussed. The discussion highlighted the need for participatory engagement of women and youth in developing, validating and deploying plant health innovations, a shift in attitudes and policies related to gender in agriculture, and recognition and deliberate actions for gender mainstreaming and social inclusion for attaining the Sustainable Development Goals (SDGs).

B.M. Prasanna speaking at the launch. (credit: Susan Otieno/CIMMYT)

Charting the course for the Initiative

The Plant Health Initiative Work Package Leads presented the Initiative’s five specific work packages and reiterated their priorities for the next three years.

“We are looking forward to taking bold action to bring all players together to make a difference in the fields of farmers all over the world,” said Prasanna.

The Initiative is poised to boost food security, especially in key locations through innovative and collaborative solutions.

For more information, visit the CGIAR Plant Health Initiative page or download a brief.

Panel Discussion Presentations

“Plant Health Management in the Global South: Key Lessons Learnt So Far, and the Way Forward” moderated by Lava Kumar (IITA) with panelists: Florence Munguti [Kenya Plant Health Inspectorate (KEPHIS)], Maryben Chiatoh Kuo (African Union-Inter-African Phytosanitary Council), Roger Day (CABI) and Mark Edge (Bayer).

“Scaling Strategy, including Gender and Social Inclusiveness of Plant Health Innovations” moderated by Nozomi Kawarazuka (CIP), with panelists Jane Kamau (IITA), Alison Watson (Grow Asia), Sarah Schmidt (GIZ), Aman Bonaventure Omondi (Alliance Bioversity-CIAT) and Nicoline de Haan (CGIAR Gender Platform)

Work Package Title and Leads

Work Package 1: Bridging Knowledge Gaps and Networks: Plant Health Threat Identification and Characterization

Lead: Monica Carvajal, Alliance of Bioversity-CIAT

Work Package 2: Risk Assessment, data management and guiding preparedness for rapid response

Lead: Lava Kumar, IITA

Work Package 3: Integrated pest and disease management

Lead: Prasanna Boddupalli, CIMMYT

Work Package 4: Tools and processes for protecting food chains from mycotoxin contamination

Lead: Alejandro Ortega-Beltran, IITA

Work Package 5: Equitable and inclusive scaling of plant health innovations to achieve impacts Co-leads:Nozomi Kawarazuka, International Potato Center (CIP), Yanyan Liu, International Food Policy Research Institute (IFPRI)

Bipolaris sorokiniana, the fungus causing spot blotch in wheat. (Photo: Xinyao He and Pawan Singh/CIMMYT)

Two approaches better than one: identifying spot blotch resistance in wheat varieties

Written by Sarah Fernandes on May 30, 2022. Posted in Publications.

Spot blotch, a major biotic stress challenging bread wheat production is caused by the fungus Bipolaris sorokiniana. In a new study, scientists from the International Maize and Wheat Improvement Center (CIMMYT) evaluate genomic and index-based selection to select for spot blotch resistance quickly and accurately in wheat lines. The former approach facilitates selecting for spot blotch resistance, and the latter for spot blotch resistance, heading and plant height.

Genomic selection

The authors leveraged genotyping data and extensive spot blotch phenotyping data from Mexico and collaborating partners in Bangladesh and India to evaluate genomic selection, which is a promising genomic breeding strategy for spot blotch resistance. Using genomic selection for selecting lines that have not been phenotyped can reduce the breeding cycle time and cost, increase the selection intensity, and subsequently increase the rate of genetic gain.

Two scenarios were tested for predicting spot blotch: fixed effects model (less than 100 molecular markers associated with spot blotch) and genomic prediction (over 7,000 markers across the wheat genome). The clear winner was genomic prediction which was on average 177.6% more accurate than the fixed effects model, as spot blotch resistance in advanced CIMMYT wheat breeding lines is controlled by many genes of small effects.

“This finding applies to other spot blotch resistant loci too, as very few of them have shown big effects, and the advantage of genomic prediction over the fixed effects model is tremendous”, confirmed Xinyao He, Wheat Pathologist and Geneticist at CIMMYT.

The authors have also evaluated genomic prediction in different populations, including breeding lines and sister lines that share one or two parents.

Spot blotch susceptible wheat lines (left) and resistant lines. (Photo: Xinyao He and Pawan Singh/CIMMYT)

Index selection

One of the key problems faced by wheat breeders in selecting for spot blotch resistance is identifying lines that are genetically resistant to spot blotch versus those that escape and exhibit less disease by being late and tall. “The latter, unfortunately, is often the case in South Asia”, explained Pawan Singh, Head of Wheat Pathology at CIMMYT.

A potential solution to this problem is the use of selection indices that can make it easier for breeders to select individuals based on their ranking or predicted net genetic merit for multiple traits. Hence, this study reports the first successful evaluation of the linear phenotypic selection index and Eigen selection index method to simultaneously select for spot blotch resistance using the phenotype and genomic-estimated breeding values, heading and height.

This study demonstrates the prospects of integrating genomic selection and index-based selection with field based phenotypic selection for resistance in spot blotch in breeding programs.

Read the full study:
Genomic selection for spot blotch in bread wheat breeding panels, full-sibs and half-sibs and index-based selection for spot blotch, heading and plant height

Cover photo: Bipolaris sorokiniana, the fungus causing spot blotch in wheat. (Photo: Xinyao He and Pawan Singh/CIMMYT)

Researchers evaluate wheat for spot blotch at CIMMYT’s experimental station in Agua Fría, Jiutepec, Morelos state, Mexico. (Photo: Xinyao He and Pawan Singh/CIMMYT)

CIMMYT scientists identify novel genomic regions associated with spot blotch resistance

Written by Sarah Fernandes on May 23, 2022. Posted in Publications.

Spot blotch, caused by the fungus Biopolaris sorokiniana poses a serious threat to bread wheat production in warm and humid wheat-growing regions globally, affecting more than 25 million hectares and resulting in huge yield losses.

Chemical control approaches, including seed treatment and fungicides, have provided acceptable spot blotch control. However, their use is unaffordable to resource-poor farmers and poses a hazard to health and the environment. In addition, “abiotic stresses like heat and drought that are widely prevalent in South Asia compound the problem, making varietal genetic resistance the last resort of farmers to combat this disease,” according to Pawan Singh, Head of Wheat Pathology at the International Maize and Wheat Improvement Center (CIMMYT). Therefore, one of CIMMYT’s wheat research focus areas is developing wheat varieties that carry genetic resistance to the disease.

Signs of spot blotch on wheat. (Photo: Philomin Juliana/CIMMYT)

Previously, only four spot blotch resistance genes in bread wheat had been identified. Through a new study, CIMMYT scientists have identified novel genomic regions associated with spot blotch resistance using the genome-wide association mapping approach with 6,736 advanced breeding lines from different years (2013 to 2020), evaluated at CIMMYT’s spot blotch screening platform in Agua Fría, in Mexico’s state of Morelos.

The study’s results are positive and confirmed that:

Many advanced CIMMYT breeding lines have moderate to high resistance to spot blotch.
Resistance to the disease is conferred quantitatively by several minor genomic regions that act together in an additive manner to confer resistance.
There is an association of the 2NS translocation from the wild species Aegilops ventricosa with spot blotch resistance.
There is also an association of the spot blotch favorable alleles at the 2NS translocation, and two markers on the telomeric end of chromosome 3BS with grain yield evaluated in multiple environments, implying that selection for favorable alleles at these markers could help obtain higher grain yield and spot blotch resistance.

“Considering the persistent threat of spot blotch to resource-poor farmers in South Asia, further research and breeding efforts to improve genetic resistance to the disease, identify novel sources of resistance by screening different germplasm, and selecting for genomic regions with minor effects using selection tools like genomic selection is essential,” explained Philomin Juliana, Molecular Breeder and Quantitative Geneticist at CIMMYT.

Read the full study:
Genome-Wide Association Mapping Indicates Quantitative Genetic Control of Spot Blotch Resistance in Bread Wheat and the Favorable Effects of Some Spot Blotch Loci on Grain Yield

Cover photo: Researchers evaluate wheat for spot blotch at CIMMYT’s experimental station in Agua Fría, Jiutepec, Morelos state, Mexico. (Photo: Xinyao He and Pawan Singh/CIMMYT)

Diane Saunders (left), Group Leader at the John Innes Centre and project co-lead, observes workshop participants during the use of MARPLE. (Photo: Danny Ward/John Innes Centre)

MARPLE reaches South Asia

Written by Rodrigo Ordóñez on May 12, 2022. Posted in News.

Workshop participants stand for a group photo. (Photo: Danny Ward/John Innes Centre)

On April 26–29, 2022, researchers from Nepal participated in a workshop on the use of MARPLE Diagnostics, the most advanced genetic testing methodology for strain-level diagnostics of the deadly wheat yellow rust fungus. Scientists from the International Maize and Wheat Improvement Center (CIMMYT) and the John Innes Centre trained 21 researchers from the Nepal Agricultural Research Council (NARC) and one from iDE. The workshop took place at NARC’s National Plant Pathology Research Centre in Khumaltar, outside the capital Kathmandu.

“The need for new diagnostic technologies like MARPLE and the critical timing of the workshop was highlighted by the severe yellow rust outbreak observed this season in the western areas of Nepal,” commented Dave Hodson, Senior Scientist at CIMMYT and project co-lead. “Having national capacity to detect the increasing threats from yellow rust using MARPLE will be an important tool to help combat wheat rusts in Nepal”.

The yellow rust fungus can cause grain yield losses of 30–80 % to wheat, Nepal’s third most important food crop.

Current diagnostic methods for wheat rust used in Nepal are slow, typically taking months between collecting the sample and final strain identification. They are also costly and reliant on sending samples overseas to highly specialized labs for analysis.

MARPLE (Mobile and Real-time PLant disEase) Diagnostics is the first method to place strain-level genetic diagnostics capability directly into the hands of Nepali researchers, generating data in-country in near-real time, for immediate integration into early warning systems and disease management decisions.

“This is a fantastic opportunity to bring the latest innovations in plant disease diagnostics for the wheat rust pathogens to where they are needed most, in the hands of researchers in the field working tirelessly to combat these devastating diseases,” commented Diane Saunders, Group Leader at the John Innes Centre and project co-lead.

Suraj Baidya senior scientist and chief of the National Plant Pathology Research Centre at NARC noted the worrying recent geographical expansion of yellow rust in Nepal. “Due to global warming, yellow rust has now moved into the plain and river basin area likely due to evolution of heat tolerant pathotypes. MARPLE Diagnostics now gives us the rapid diagnostics needed to help identify and manage these changes in the rust pathogen population diversity,” he said.

The highly innovative MARPLE Diagnostics approach uses the hand-held MinION nanopore sequencer, built by Oxford Nanopore, to generate genetic data to type strains of the yellow rust fungus directly from field samples.

Beyond MARPLE Diagnostics, Saunders noted that “the workshop has also opened up exciting new possibilities for researchers in Nepal, by providing local genome-sequencing capacity that is currently absent.”

MARPLE (Mobile and Real-time PLant disEase) Diagnostics is a revolutionary mobile lab kit. It uses nanopore sequence technology to rapidly diagnose and monitor wheat rust in farmers’ fields. (Photo: Danny Ward/John Innes Centre)

What’s next for MARPLE Diagnostics in Nepal?

Following the successful workshop, Nepali researchers will be supported by CIMMYT and the John Innes Centre to undertake MARPLE Diagnostics on field samples collected by NARC. “The current plan includes monitoring of yellow rust on the summer wheat crop planted at high hill areas and then early sampling in the 2022/23 wheat season,” Hodson noted.

“We were struck by the enthusiasm and dedication of our colleagues to embrace the potential offered by MARPLE Diagnostics. Looking forward, we are excited to continue working with our Nepali colleagues towards our united goal of embedding this methodology in their national surveillance program for wheat rusts,” Saunders remarked.

MARPLE Diagnostics is supported by the Feed the Future Innovation Lab for Current and Emerging Threats to Crops, funded by the United States Agency for International Development (USAID), the UK Biotechnology and Biological Sciences Research Council (BBSRC) Innovator of the Year Award, the CGIAR Big Data Platform Inspire Challenge, the Bill & Melinda Gates Foundation and the United Kingdom’s Foreign, Commonwealth and Development Office.

This article was originally published on the JIC website.

MAIZE partners announce a new manual for effectively managing maize lethal necrosis (MLN) disease

Written by Sarah McLaughlin on April 11, 2022. Posted in Features.

For a decade, scientists at the International Maize and Wheat Improvement Center (CIMMYT) have been at the forefront of a multidisciplinary and multi-institutional effort to contain and effectively manage maize lethal necrosis (MLN) disease in Africa.

When the disease was first reported in Kenya 2011 it spread panic among stakeholders. Scientists soon realized that almost all commercial maize varieties in Africa were susceptible. What followed was a superlative effort coordinated by the CGIAR Research Program on Maize (MAIZE) to mobilize “stakeholders, resources and knowledge” that was recently highlighted in an external review of program.

The publication of Maize Lethal Necrosis (MLN): A Technical Manual for Disease Management builds on the partnerships and expertise accrued over the course of this effort to provide a comprehensive “guide on best practices and protocols for sustainable management of the MLN.”

The manual is relevant to stakeholders in countries where MLN is already present, and also aims to offer technical tips to “‘high-risk’ countries globally for proactive implementation of practices that can possibly prevent the incursion and spread of the disease,” writes B.M. Prasanna, director of CIMMYT’s Global Maize Program and MAIZE, in the foreword.

“While intensive multi-disciplinary and multi-institutional efforts over the past decade have helped in containing the spread and impact of MLN in sub-Saharan Africa, we cannot afford to be complacent. We need to continue our efforts to safeguard crops like maize from devastating diseases and insect-pests, and to protect the food security and livelihoods of millions of smallholders,” says Prasanna, who is presently leading the OneCGIAR Plant Health Initiative Design Team.

CIMMYT distinguished scientist Ravi Singh conducts research on a wheat field while. (Photo: BGRI)

Ravi Singh earns Lifetime Achievement award from BGRI

Written by Rodrigo Ordóñez on October 19, 2021. Posted in News.

World-renowned plant breeder Ravi Singh, whose elite wheat varieties reduced the risk of a global pandemic and now feed hundreds of millions of people around the world, has been announced as the 2021 Borlaug Global Rust Initiative (BGRI) Lifetime Achievement Award recipient.

Singh, distinguished scientist and head of Global Wheat Improvement at the International Maize and Wheat Improvement Center (CIMMYT), endowed hundreds of modern wheat varieties with durable resistance to fungal pathogens that cause leaf rust, stem rust, stripe rust and other diseases during his career. His scientific efforts protect wheat from new races of some of agriculture’s oldest and most devastating diseases, safeguard the livelihoods of smallholder farmers in the most vulnerable areas in the world, and enhance food security for the billions of people whose daily nutrition depends on wheat consumption.

“Ravi’s innovations as a scientific leader not only made the Cornell University-led Borlaug Global Rust Initiative possible, but his breeding innovations are chiefly responsible for the BGRI’s great success,” said Ronnie Coffman, vice chair of the BGRI and international professor of global development at Cornell’s College of Agriculture and Life Sciences. “Perhaps more than any other individual, Ravi has furthered Norman Borlaug’s and the BGRI’s goal that we maintain the global wheat scientific community and continue the crucial task of working together across international borders for wheat security.”

In the early 2000s, when a highly virulent rust race discovered in East Africa threatened most of the world’s wheat, Singh took a key leadership role in the formation of a global scientific coalition to combat the threat. Along with Borlaug, Coffman and other scientists, he served as a panel member on the pivotal report alerting the international community to the Ug99 outbreak and its potential impacts to global food security. That sounding of the alarm spurred the creation of the BGRI and the collaborative international effort to stop Ug99 before it could take hold on a global scale.

As a scientific objective leader for the BGRI’s Durable Rust Resistance in Wheat and Delivering Genetic Gain in Wheat projects, Singh led efforts to generate and share a series of elite wheat lines featuring durable resistance to all three rusts. The results since 2008 include resistance to the 12 races of the Ug99 lineage and new, high-temperature-tolerant races of stripe rust fungus that had been evolving and spreading worldwide since the beginning of the 21^st century.

“Thanks to Ravi Singh’s vision and applied science, the dire global threat of Ug99 and other rusts has been averted, fulfilling Dr. Borlaug’s fervent wishes to sustain wheat productivity growth, and contributing to the economic and environmental benefits from reduced fungicide use,” Coffman said. “Ravi’s innovative research team at CIMMYT offered crucial global resources to stop the spread of Ug99 and the avert the human catastrophe that would have resulted.”

An innovative wheat breeder known for his inexhaustible knowledge and attention to genetic detail, Singh helped establish the practice of “pyramiding” multiple rust-resistance genes into a single variety to confer immunity. This practice of adding complex resistance in a way that makes it difficult for evolving pathogens to overcome new varieties of wheat now forms the backbone of rust resistance breeding at CIMMYT and other national programs.

Ravi Singh (center) with Norman Borlaug (left) and Hans Braun in the wheat fields at CIMMYT’s experimental station in Ciudad Obregón, in Mexico’s Sonora state. (Photo: CIMMYT)

The global champion for durable resistance

Ravi joined CIMMYT in 1983 and was tasked by his supervisor, mentor and friend, the late World Food Prize Winner Sanjaya Rajaram, to develop wheat lines with durable resistance, said Hans Braun, former director of CIMMYT’s Global Wheat Program.

“Ravi did this painstaking work — to combine recessive resistance genes — for two decades as a rust geneticist and, as leader of CIMMYT’s Global Spring Wheat Program, he transferred them at large scale into elite lines that are now grown worldwide,” Braun said. “Thanks to Ravi and his colleagues, there has been no major rust epidemic in the Global South for years, a cornerstone for global wheat security.”

Alison Bentley, Director of CIMMYT’s Global Wheat Program, said that “Building on Ravi’s exceptional work throughout his career, deployment of durable rust resistance in widely adapted wheat germplasm continues to be a foundation of CIMMYT’s wheat breeding strategy.”

Revered for his determination and work ethic throughout his career, Singh has contributed to the development of 649 wheat varieties released in 48 countries, working closely with scientists at national wheat programs in the Global South. Those varieties today are sown on approximately 30 million hectares annually in nearly all wheat growing countries of southern and West Asia, Africa and Latin America. Of these varieties, 224 were developed directly under his leadership and are grown on an estimated 10 million hectares each year.

In his career Singh has authored 328 refereed journal articles and reviews, 32 book chapters and extension publications, and more than 80 symposia presentations. He is regularly ranked in the top 1% of cited researchers. The CIMMYT team that Singh leads identified and designated 22 genes in wheat for resistance or tolerance to stem rust, leaf rust, stripe rust, powdery mildew, barley yellow dwarf virus, spot blotch, and wheat blast, as well as characterizing various other important wheat genome locations contributing to durable resistance in wheat.

Singh’s impact as a plant breeder and steward of genetic resources over the past four decades has been extraordinary, according to Braun: “Ravi Singh can definitely be called the global champion for durable resistance.”

This piece by Matt Hayes was originally posted on the BGRI website.

A researchers shows a maize leaf affected by fall armyworm at CIMMYT’s fall armyworm screenhouse in Kiboko, Kenya. (Photo: Jennifer Johnson/CIMMYT)

How do we sustainably manage transboundary diseases and crop pests?

Written by Madeline Dahm on March 25, 2021. Posted in Features.

In our hyper-connected world, it should come as no surprise that recent years have shown a major uptick in the spread of transboundary pests and diseases. Integrated approaches have been effective in sustainably managing these border-jumping threats to farmers’ livelihoods and food security.

But a truly integrated approach accounts for not just the “cure,” but also how it can be sustainably incorporated into the agri-food system and social landscape. For example, how do we know if the farmers who adopt disease- and pest-resistant seed will be able to derive better incomes? And how do we ensure that incentives are aligning with community norms and values to enable better adoption of integrated disease or pest management approaches?

Experts from across the CGIAR research system and its partners weighed in on this topic in the recent webinar on Integrated Pest and Disease Management, the third in the International Year of Plant Health Webinar series. Panelists shared valuable perspectives on the science of outbreaks, the social dimensions of crop pest and disease control, zoonotic disease risk, and how national, regional and global organizations can better coordinate their responses.

“The combination of science, global partnerships and knowledge helps all of us be better prepared to avoid the losses we’ve seen. . . Today, we’re going to see what this looks like in practice,” said Rob Bertram, chief scientist for the Bureau for Resilience and Food Security at USAID, and moderator of the event.

Participants on the webinar on Integrated Pest and Disease Management. (Photo: CIMMYT)

Understanding the sources

Wheat and maize, the key crops studied at the International Maize and Wheat Improvement Center (CIMMYT) are no stranger to destructive diseases or pests, with fall armyworm, wheat blast, or maize lethal necrosis topping the list. But other staple crops and their respective economies are suffering as well — from infestations of cassava brown streak, potato cyst nematode, taro blight, desert locusts, and fusarium wilt, just to name a few.

What are the reasons for the expansion of these outbreaks? B.M. Prasanna, director of CIMMYT’s Global Maize Program explained that there are several: “Infected seed or planting material, vector movement, strong migratory capacity, contaminated field equipment, improper crop production commercialization practices, and global air and sea traffic” are all major causes.

Prevention and control of diseases and pests requires an integral strategy which mobilizes synergies of multiple institutions. (Graphic: B.M. Prasanna/CIMMYT)

Preventing outbreaks is always better than scrambling to find a cure, but as Prasanna pointed out, this requires a holistic, multi-institutional strategy including surveillance and early warning, quarantine and phytosanitary regulations, and technological solutions. Better access to monitoring and surveillance data, and sensitive, easy-to-use and affordable diagnostic equipment are essential, as is the proactive deployment of resistant crop varieties.

Building awareness about integrated disease and pest management is just as important, he told the attendees. “We must remember that IPM is not just Integrated Pest Management, but also ‘Integrating People’s Mindsets.’ That remains a major challenge. We need to think beyond our narrow disciplines and institutions and really come together to put IPM solutions into farmers’ fields,” Prasanna said.

Not all outbreaks are the same, but lessons can be shared

Regina Eddy, coordinator for the Fall Armyworm Interagency Task Force at USAID, works closely with the complex issue of scaling when it comes to disaster response and the roles of national, regional and global organizations.

“We need to develop inclusive partner stakeholder platforms, not designed ‘for them,’ but ‘with them,’” said Eddy. “We cannot tackle food security issues alone. Full stop.”

Closing the gap between social and biophysical science

Nozomi Kawarazuka, social anthropologist at the International Potato Center (CIP) explained how researchers can improve the uptake of their new seed, innovation, or agronomic practice by involving social scientists to understand the gender norms and social landscape at the beginning of the project — in the initial assessment phase.

Kawarazuka highlighted how involving women experts and extension workers in sectors that are typically male-dominated helps reduce bias and works towards changing perceptions.

“In South Asia, women farmers hesitate to engage with male government extension workers,” she said. “Women experts and extension workers reduce this barrier. Gender and social diversity in the plant health sector is an entry point to develop innovations that are acceptable to women as well as men and helps scale up adoption of innovations in the community.

Gender and social dimensions of pest and disease control: a call for collaboration (Graphic: Nozomi Kawarazuka/CIP)

The world is watching agriculture and livestock

Zoonotic diseases, or zoonoses, are caused by pathogens spread between animals and people. Understanding zoonotic disease risk is an essential and timely topic in the discussion of integrated pest management. Poor livestock management practices, lack of general knowledge on diseases and unsafe yet common food handling practices put populations at risk.

“It’s especially timely, [to have this] zoonosis discussion in our COVID-plagued planet. The whole world is going to be looking to the food and agricultural sectors to do better,” Bertram said.

Annet Mulema, a gender and social scientist at the International Livestock Research Institute (ILRI) described results of a study showing how community conversations transformed gender relations and zoonotic disease risk in rural Ethiopia, where 80% of the population depends on agriculture and has direct contact with livestock.

“There were noticeable changes in attitude and practices among men and women regarding unsafe handling of animals and consumption of animal-source foods,” Mulema explained. “Community conversations give men and women involved a voice, it allows for a variety of ideas to be expressed and discussed, leads to community ownership of conclusions and action plans, and opens communication channels among local service providers and community members.”

Proportion of women and men practicing safe handling of livestock and animal source foods, before and after community conversation intervention. (Graphic: Annet Mulema/ILRI)

Local to global, and global to local

Panelists agreed that improving capacity is the most powerful lever to advance approaches for integrated pest management and plant health, while connected and inclusive partnerships along the value chain make the whole system more resilient. The amount of scientific knowledge on ways to combat plant pests and diseases is increasing, and we have new tools to connect the global with the local and bring this knowledge to the community level.

The fourth and final CGIAR webinar on plant health is scheduled for March 31 and will focus on a the intersectional health of people, animals, plants and their environments in a “One Health” approach.

All farmers are susceptible to extreme weather events, and many are already feeling the effects of climate change. (Photo: N. Palmer/CIAT)

CGIAR webinar unleashes multidisciplinary approach to climate change and plant health

Written by Steven M on February 8, 2021. Posted in Features.

Evidence of enormity and immediacy of the challenges climate change poses for life on earth seems to pour in daily. But important gaps in our knowledge of all the downstream effects of this complex process remain. And the global response to these challenges is still far from adequate to the job ahead. Bold, multi-stakeholder, multidisciplinary action is urgent.

Mindful of this, the first event in Unleashing the Potential of Plant Health, a CGIAR webinar series in celebration of the UN-designated International Year of Plant Health, tackled the complicated nexus between climate change and plant health. The webinar, titled “Climate change and plant health: impact, implications and the role of research for adaptation and mitigation,” convened a diverse panel of researchers from across the CGIAR system and over 900 audience members and participants.

In addition to exploring the important challenges climate changes poses for plant health, the event explored the implications for the wellbeing and livelihoods of smallholder farming communities in low- and middle- income countries, paying special attention to the gender dimension of both the challenges and proposed solutions.

The event was co-organized by researchers at the International Rice Research Institute (IRRI) and the International Centre of Insect Physiology and Ecology (icipe).

The overall webinar series is hosted by the International Maize and Wheat Improvement Center (CIMMYT), the International Potato Center (CIP), the International Food Policy Research Institute (IFPRI), the International Institute of Tropical Agriculture (IITA) and the International Rice Research Institute (IRRI). It is sponsored by the CGIAR Research Program on Agriculture for Nutrition (A4NH), the CGIAR Gender Platform and the CGIAR Research Program on Roots, Tubers and Bananas (RTB).

This is important

The stakes for the conversation were forcefully articulated by Shenggen Fan, chair professor and dean of the Academy of Global Food Economics and Policy at China Agricultural University and member of the CGIAR System Board. “Because of diseases and pests, we lose about 20-40% of our food crops. Can you imagine how much food we have lost? How many people we could feed with that lost food? Climate change will make this even worse,” Fan said.

Such impacts, of course, will not be evenly felt across geographic and social divides, notably gender. According to Jemimah Njuki, director for Africa at IFPRI, gender and household relationships shape how people respond to and are impacted by climate change. “One of the things we have evidence of is that in times of crises, women’s assets are often first to be sold and it takes even longer for them to be recovered,” Njuki said.

The desert locust has been around since biblical times. Climate change has contributed to its reemergence as a major pest. (Photo: David Nunn)

Shifting risks

When it comes to understanding the impact of climate change on plant health “one of our big challenges is to understand where risk will change,” said Karen Garrett, preeminent professor of plant pathology at the University of Florida,

This point was powerfully exemplified by Henri Tonnang, head of Data Management, Modelling and Geo-information Unit at icipe, who referred to the “unprecedented and massive outbreak” of desert locusts in 2020. The pest — known since biblical times — has reemerged as a major threat due to extreme weather events driven by sea level rise.

Researchers highlighted exciting advancements in mapping, modelling and big data techniques that can help us understand these evolving risks. At the same time, they stressed the need to strengthen cooperation not only among the research community, but among all the stakeholders for any given research agenda.

“The international research community needs to transform the way it does research,” said Ana María Loboguerrero, research director for Climate Action at the Alliance of Bioversity International and CIAT. “We’re working in a very fragmented way, sometime inefficiently and with duplications, sometimes acting under silos… It is difficult to deliver end-to-end sustainable and scalable solutions.”

Time for a new strategy

Such injunctions are timely and reaffirm CGIAR’s new strategic orientation. According to Sonja Vermeulen, the event moderator and the director of programs for the CGIAR System Management Organization, this strategy recognizes that stand-alone solutions — however brilliant — aren’t enough to make food systems resilient. We need whole system solutions that consider plants, animals, ecosystems and people together.

Echoing Fan’s earlier rallying cry, Vermeulen said, “This is important. Unless we do something fast and ambitious, we are not going to meet the Sustainable Development Goals.”

Register for the other webinars in the series

Cover photo: All farmers are susceptible to extreme weather events, and many are already feeling the effects of climate change. (Photo: N. Palmer/CIAT)