Theme: Climate adaptation and mitigation

Climate change threatens to reduce global crop production, and poor people in tropical environments will be hit the hardest. More than 90% of CIMMYT’s work relates to climate change, helping farmers adapt to shocks while producing more food, and reduce emissions where possible. Innovations include new maize and wheat varieties that withstand drought, heat and pests; conservation agriculture; farming methods that save water and reduce the need for fertilizer; climate information services; and index-based insurance for farmers whose crops are damaged by bad weather. CIMMYT is an important contributor to the CGIAR Research Program on Climate Change, Agriculture and Food Security.

Farmers at the field school in Msambafumu, Malawi, begin preparing the soil for their next set of experiments. (Photo: Emma Orchardson/CIMMYT)

Out of the classroom and into the field

Written by Emma Orchardson on April 23, 2020. Posted in Features.

When farmers in rural Kasungu, Malawi, are asked to list some of the challenges they face, much of what they say is to be expected. Crop pests, climate change, low soil fertility, and lack of improved seed and purchasing power — these are faced by smallholders across districts and the country as a whole.

But there is one surprising response. “Sometimes it’s difficult to get feedback from research centers on what does and doesn’t work,” says Maxwell Phiri.

Capacity building and knowledge transfer are key elements of agricultural development work, but there is often a gap between research, outreach and extension to farmers. New techniques and crop varieties tested at experimental stations can take a while to reach rural communities, who want solutions to the challenges they are facing in real time.

“But now it’s easier for us because the research is being done here.” Phiri points to the farmer field school in Msambafumu, a few hectares of communal land where 23 smallholders from the surrounding area meet regularly to learn about new technologies and farming techniques.

At the school they have been able to learn first-hand about improved and new agricultural practices and technologies. Following an introduction to climate-smart agriculture practices, they have moved on to agroforestry, learning about the benefits of intercropping drought-tolerant maize with pigeon peas and fruit trees. “We’ve even started practicing climate-smart agriculture in our own fields and planting agroforestry trees,” says Ntendeleza Mwale, a member of the field school in Msambafumu and chair of a network of 17 schools in the district. “Now everybody is growing fruit trees at home.”

“We didn’t know that potatoes, millet and sorghum could grow here, because we thought the soil wasn’t suitable, but the school has showed us what is possible,” explains Maxwell Phiri (first from left). “You learn a lot of things in a group that you might not learn on your own.” (Photo: Emma Orchardson/CIMMYT)

Back to school

A farmer field school is a group of 25-30 farmers, led by a master trainer, who come together to solve common challenges faced in their local area, such as soil degradation or poor water availability. Since 2014, the Government of Malawi has been using this innovative approach to help farmers learn about and improve their production systems through the KULIMA project. With support from a CGIAR consortium led by the International Potato Center (CIP), 15 schools have been established across the districts of Kasungu, Mulanje and Mzuzu, including master training hubs and outreach centers run by NGOs.

The overall objective is to increase agricultural productivity and diversification by upscaling climate-smart technologies,” explains Mathinda Sopo, a monitoring and evaluation specialist and project manager at the International Maize and Wheat Improvement Center (CIMMYT). “Master trainer candidates are selected in each district and then invited to sit down with researchers and identify their core production challenges. The plans are then developed collaboratively and based on agroecological zone.”

In February 2020, a new cohort of trainees arrived at the Lisasadizi Regional Training Center in Kasungu, where the Ministry of Agriculture coordinates trainings on four key topics — soil health, climate change, pests and diseases and nutrition — in collaboration with the UN Food and Agriculture Organization (FAO) and the CGIAR consortium, supported by the German development agency GIZ.

The 13-week residential course is mostly practical but does include some classroom-based study and a community outreach component. Guided by a facilitator — usually a researcher or extension worker — participants are encouraged to learn from their experiences as they conduct experiments in their own fields, make observations and evaluate results throughout the cropping season. Outside of the core curriculum, they are free to investigate additional topics of their own choice.

After completing the course, master trainers move back to their respective areas to help train facilitators, who are ultimately responsible for running the field schools with support from NGO extension staff.

“The CGIAR centers bring in technologies they want to promote like improved crop varieties, but there are ongoing evaluations throughout the process to respond to newly emerging challenges such as fall armyworm,” says Sopo. “There’s also a review at the end of each season to discuss lessons learned and knowledge gaps.”

CIMMYT, for example, is focusing on promoting drought-tolerant, quality protein maize (QPM), and provitamin A maize, as well as climate-smart agriculture practices. At Msambafumu, the group have been comparing five improved maize varieties with local ones. “So far we’ve seen that the new varieties have bigger yields and cob sizes,” says Mwale. “Varieties like Chitedze 2 QPM and MH43A are also early maturing and are more nutritious.”

Farmers at the field schools in Msambafumu and Tiyese, in Malawi, have been surprised to find that banana trees can be grown in their area. (Photo: Emma Orchardson/CIMMYT)

At the field school in Tiyese, Malawi, farmers are using two adjacent maize plots to compare the effects of leaving crop residue on their field. (Photo: Emma Orchardson/CIMMYT)

Learning by doing

A few kilometers down the road, in Galika village, members of the Tiyese field school have been learning how to control a variety of pests and diseases. So far, they have been taught about different pesticides and the benefits of using inoculant on soya beans and ground nuts to improve soil fertility, and how to identify and mitigate disease in susceptible potato varieties. They have also been learning how to apply Aflasafe while crops are still in the field to reduce aflatoxins in maize and groundnuts.

But the most pressing challenge is fall armyworm, says Matolino Zimba, a member of the Tiyese field school. “We’ve been trying new methods for controlling it,” he explains. “Last year we planted mucuna beans in our banana orchard as a cover crop. Later we soaked mucuna leaves in water and poured the solution on the infested maize and noticed that the worms were dying.”

Zimba is satisfied with the learning methods at the field school. “This approach is better for us because we get to see the process, rather than just receiving an explanation.”

Emily Kaponda agrees. She first joined the group after noticing that participating farmers were getting higher yields by using new planting methods. “The school has a smaller plot of land than I do, but their bundles of maize were much larger,” she explains.

Since joining the field school, she has learned how to increase her yields, how to conserve moisture in the soil using zero-tillage farming and the importance of diversifying her family’s diets. “We’re learning how we can use cassava or sweet potato as a starch, instead of only using maize.”

Zimba and Kaponda are both excited to be trying out QPM and provitamin A maize varieties, as well as new varieties of cassava, orange-fleshed sweet potato, improved groundnuts, biofortified beans and bananas. Much like their peers at Msambafumu, they had not known that many of these could be grown in the area, and the group has already started planning to multiply planting materials to use in their own fields next year.

“These groups are really inspirational,” says Sopo. “Most members are already practicing things they’ve learned at their school and are getting positive results.”

Sopo is already seeing success stories from schools established one year ago, but collaboration will need to be sustained to ensure lasting progress. A new research initiative, Development-Smart Innovations through Research in Agriculture (DeSIRA), will help to maintain the positive feedback loop by investigating emerging issues raised during on-farm experiments. “We can take farmer observations from the study plots to DeSIRA for further research, and the outputs from that will complement KULIMA.”

Farmers at the field school in Msambafumu, Malawi, begin preparing the soil for their next set of experiments. (Photo: Emma Orchardson/CIMMYT)

Matolino Zimba checks on the emerging maize crop, which has been covered in crop residue to conserve moisture, at the field school in Tiyese, Malawi. (Photo: Emma Orchardson/CIMMYT)

Blast and rust forecast

Written by Matthew O'Leary on April 20, 2020. Posted in Features. 1 Comment on Blast and rust forecast

An early warning system set to deliver wheat disease predictions directly to farmers’ phones is being piloted in Bangladesh and Nepal by interdisciplinary researchers.

Experts in crop disease, meteorology and computer science are crunching data from multiple countries to formulate models that anticipate the spread of the wheat rust and blast diseases in order to warn farmers of likely outbreaks, providing time for pre-emptive measures, said Dave Hodson, a principal scientist with the International Maize and Wheat Improvement Center (CIMMYT) coordinating the pilot project.

Around 50,000 smallholder farmers are expected to receive improved disease warnings and appropriate management advisories through the one-year proof-of-concept project, as part of the UK Aid-funded Asia Regional Resilience to a Changing Climate (ARRCC) program.

Early action is critical to prevent crop diseases becoming endemic. The speed at which wind-dispersed fungal wheat diseases are spreading through Asia poses a constant threat to sustainable wheat production of the 130 million tons produced in the region each year.

“Wheat rust and blast are caused by fungal pathogens, and like many fungi, they spread from plant to plant — and field to field — in tiny particles called spores,” said Hodson. “Disease strain mutations can overcome resistant varieties, leaving farmers few choices but to rely on expensive and environmentally-damaging fungicides to prevent crop loss.”

“The early warning system combines climate data and epidemiology models to predict how spores will spread through the air and identifies environmental conditions where healthy crops are at risk of infection. This allows for more targeted and optimal use of fungicides.”

The system was first developed in Ethiopia. It uses weather information from the Met Office, the UK’s national meteorological service, along with field and mobile phone surveillance data and disease spread modeling from the University of Cambridge, to construct and deploy a near real-time early warning system.

CIMMYT consultant Madan Bhatta conducts field surveys using Open Data Kit (ODK) in the mid-hills of Nepal. (Photo: D. Hodson/CIMMYT)

Initial efforts focused on adapting the wheat stripe and stem rust model from Ethiopia to Bangladesh and Nepal have been successful, with field surveillance data appearing to align with the weather-driven disease early warnings, but further analysis is ongoing, said Hodson.

“In the current wheat season we are in the process of comparing our disease forecasting models with on-the-ground survey results in both countries,” the wheat expert said.

“Next season, after getting validation from national partners, we will pilot getting our predictions to farmers through text-based messaging systems.”

CIMMYT’s strong partnerships with governmental extension systems and farmer associations across South Asia are being utilized to develop efficient pathways to get disease predictions to farmers, said Tim Krupnik, a CIMMYT Senior Scientist based in Bangladesh.

“Partnerships are essential. Working with our colleagues, we can validate and test the deployment of model-derived advisories in real-world extension settings,” Krupnik said. “The forecasting and early warning systems are designed to reduce unnecessary fungicide use, advising it only in the case where outbreaks are expected.”

Local partners are also key for data collection to support and develop future epidemiological modelling, the development of advisory graphics and the dissemination of information, he explained.

The second stage of the project concerns the adaptation of the framework and protocols for wheat blast disease to improve existing wheat blast early warning systems already pioneered in Bangladesh.

Example of weekly stripe rust spore deposition forecast in Nepal. Darker colors represent higher predicted number of spores deposited. The early warning system combines weather information from the Met Office with field and mobile phone surveillance data and disease spread modeling from the University of Cambridge. (Graphic: University of Cambridge and Met Office)

Strong scientific partnership champions diversity to achieve common goals

The meteorological-driven wheat disease warning system is an example of effective international scientific partnership contributing to the UN Sustainable Development Goals, said Sarah Millington, a scientific manager at Atmospheric Dispersion and Air Quality Group with the Met Office.

“Diverse expertise from the Met Office, the University of Cambridge and CIMMYT shows how combined fundamental research in epidemiology and meteorology modelling with field-based disease observation can produce a system that boosts smallholder farmers’ resilience to major agricultural challenges,” she said.

The atmospheric dispersion modeling was originally developed in response to the Chernobyl disaster and since then has evolved to be able to model the dispersion and deposition of a range of particles and gases, including biological particles such as wheat rust spores.

“The framework together with the underpinning technologies are transferable to forecast fungal disease in other regions and can be readily adapted for other wind-dispersed pests and disease of major agricultural crops,” said Christopher Gilligan, head of the Epidemiology and Modelling Group at the University of Cambridge.

Fungal wheat diseases are an increasing threat to farmer livelihoods in Asia

Wheat leaf rust can be spotted on a wheat plant of a highly susceptible variety in Nepal. The symptoms of wheat rust are dusty, reddish-orange to reddish-brown fruiting bodies that appear on the leaf surface. These lesions produce numerous spores, which are spread by wind and splashing water. (Photo: D Hodson/CIMMYT)

While there has been a history of wheat rust disease epidemics in South Asia, new emerging strains and changes to climate pose an increased threat to farmers’ livelihoods. The pathogens that cause rust diseases are continually evolving and changing over time, making them difficult to control.

Stripe rust threatens farmers in Afghanistan, India, Nepal and Pakistan, typically in two out of five seasons, with an estimated 43 million hectares of wheat vulnerable. When weather conditions are conducive and susceptible cultivars are grown, farmers can experience losses exceeding 70%.

Populations of stem rust are building at alarming rates and previously unseen scales in neighboring regions. Stem rust spores can spread across regions on the wind; this also amplifies the threat of incursion into South Asia and the ARRCC program’s target countries, underscoring the very real risk that the disease could reemerge within the subcontinent.

The devastating wheat blast disease, originating in the Americas, suddenly appeared in Bangladesh in 2016, causing wheat crop losses as high as 30% on a large area, and continues to threaten South Asia’s vast wheat lands.

In both cases, quick international responses through CIMMYT, the CGIAR research program on Wheat (WHEAT) and the Borlaug Global Rust Initiative have been able to monitor and characterize the diseases and, especially, to develop and deploy resistant wheat varieties.

The UK aid-funded ARRCC program is led by the Met Office and the World Bank and aims to strengthen weather forecasting systems across Asia. The program is delivering new technologies and innovative approaches to help vulnerable communities use weather warnings and forecasts to better prepare for climate-related shocks.

The early warning system uses data gathered from the online Rust Tracker tool, with additional fieldwork support from the Cereal Systems Initiative for South Asia (CSISA), funded by USAID and the Bill & Melinda Gates Foundation, both coordinated by CIMMYT.

Conservation agriculture key to better income, environment protection: Study

Written by Mary Donovan on April 17, 2020. Posted in In the media.

Resorting to conservation agriculture would not only increase crop yield, income and reduce the use of natural resources, but would also confer climate change benefits, according to a study by Indian agricultural scientists and others published in an international journal on Thursday.

The study, published in the journal Nature Sustainability, also showed that conservation agriculture was key to meeting many of the UN’s Sustainable Development Goals (SDGs) such as no poverty, zero hunger, good health and well-being, climate action and clean water. Conservation agriculture can offer positive contributions to several SDGs, said M. L. Jat, a Principal Scientist at the International Maize and Wheat Improvement Center (CIMMYT) and first author of the study.

During a conservation agriculture course, a young trainee operates a Happy Seeder mounted on a two-wheel tractor, for direct seeding of wheat in smallholder systems. (Photo: CIMMYT)

Conservation agriculture key in meeting UN Sustainable Development Goals

Written by Alison Doody on April 16, 2020. Posted in Press releases. 2 Comments on Conservation agriculture key in meeting UN Sustainable Development Goals

An international team of scientists has provided a sweeping new analysis of the benefits of conservation agriculture for crop performance, water use efficiency, farmers’ incomes and climate action across a variety of cropping systems and environments in South Asia.

The analysis, published today in Nature Sustainability, is the first of its kind to synthesize existing studies on conservation agriculture in South Asia and allows policy makers to prioritize where and which cropping systems to deploy conservation agriculture techniques. The study uses data from over 9,500 site-year comparisons across South Asia.

According to M.L. Jat, a principal scientist at the International Maize and Wheat Improvement Center (CIMMYT) and first author of the study, conservation agriculture also offers positive contributions to the Sustainable Development Goals of no poverty, zero hunger, good health and wellbeing, climate action and clean water.

“Conservation agriculture is going to be key to meet the United Nations Sustainable Development Goals,” echoed JK Ladha, adjunct professor at the University of California, Davis, and co-author of the study.

Scientists from CIMMYT, the Indian Council of Agricultural Research (ICAR), the University of California, Davis, the International Rice Research Institute (IRRI) and Cornell University looked at a variety of agricultural, economic and environmental performance indicators — including crop yields, water use efficiency, economic return, greenhouse gas emissions and global warming potential — and compared how they correlated with conservation agriculture conditions in smallholder farms and field stations across South Asia.

A combine harvester equipped with the Super SMS (left) harvests rice while a tractor equipped with the Happy Seeder is used for direct seeding of wheat. (Photo: Sonalika Tractors)

Results and impact on policy

Researchers found that many conservation agriculture practices had significant benefits for agricultural, economic and environmental performance indicators, whether implemented separately or together. Zero tillage with residue retention, for example, had a mean yield advantage of around 6%, provided farmers almost 25% more income, and increased water use efficiency by about 13% compared to conventional agricultural practices. This combination of practices also was shown to cut global warming potential by up to 33%.

This comes as good news for national governments in South Asia, which have been actively promoting conservation agriculture to increase crop productivity while conserving natural resources. South Asian agriculture is known as a global “hotspot” for climate vulnerability.

“Smallholder farmers in South Asia will be impacted most by climate change and natural resource degradation,” said Trilochan Mohapatra, Director General of ICAR and Secretary of India’s Department of Agricultural Research and Education (DARE). “Protecting our natural resources for future generations while producing enough quality food to feed everyone is our top priority.”

“ICAR, in collaboration with CIMMYT and other stakeholders, has been working intensively over the past decades to develop and deploy conservation agriculture in India. The country has been very successful in addressing residue burning and air pollution issues using conservation agriculture principles,” he added.

With the region’s population expected to rise to 2.4 billion, demand for cereals is expected to grow by about 43% between 2010 and 2050. This presents a major challenge for food producers who need to produce more while minimizing greenhouse gas emissions and damage to the environment and other natural resources.

“The collaborative effort behind this study epitomizes how researchers, policy-makers, and development practitioners can and should work together to find solutions to the many challenges facing agricultural development, not only in South Asia but worldwide,” said Jon Hellin, leader of the Sustainable Impact Platform at IRRI.

Related publications:

Conservation agriculture for sustainable intensification in South Asia.

Interview opportunities:

M.L. Jat, Principal Scientist and Cropping Systems Agronomist, International Maize and Wheat Improvement Center (CIMMYT)

For more information, or to arrange interviews, contact:

Rodrigo Ordóñez, Communications Manager, CIMMYT. r.ordonez@cgiar.org

Acknowledgements:

Funders of this work include the Indian Council of Agricultural Research (ICAR), the Government of India and the CGIAR Research Programs on Wheat Agri-Food Systems (CRP WHEAT) and Climate Change, Agriculture and Food Security (CCAFS).

About CIMMYT:

The International Maize and Wheat Improvement Center (CIMMYT) is the global leader in publicly-funded maize and wheat research and related farming systems. Headquartered near Mexico City, CIMMYT works with hundreds of partners throughout the developing world to sustainably increase the productivity of maize and wheat cropping systems, thus improving global food security and reducing poverty. CIMMYT is a member of the CGIAR System and leads the CGIAR Research Programs on Maize and Wheat and the Excellence in Breeding Platform. The Center receives support from national governments, foundations, development banks and other public and private agencies. For more information, visit staging.cimmyt.org.

A maize farmer in southern Ethiopia. (Photo: S. Samuel/CCAFS)

A less risky business

Written by Rodrigo Ordóñez on April 14, 2020. Posted in News.

A maize farmer in southern Ethiopia. (Photo: <a href="https://flic.kr/p/2hp5uoS">S. Samuel/CCAFS</a>) — A maize farmer in southern Ethiopia. (Photo: S. Samuel/CCAFS)

Because of unpredictable climate conditions, agricultural production in Ethiopia faces uncertainties during both the growing and harvesting seasons. The risk and uncertainty are bigger for smallholder farmers, as they can’t protect themselves from climate-related asset losses. Access to insurance schemes, climate information and other tools could help to minimize climate risks for smallholder farmers.

A new collaborative project launched in Ethiopia aims to reduce agricultural investment risk. The Capacitating African Stakeholders with Climate Advisories and Insurance Development (CASCAID-II) project builds on learnings from the CASCAID-I project in West Africa. It will target Ethiopia, Ghana and Senegal, focusing not only on smallholder farmers but on the food value chain as a whole. In a context of increasing integration of farmers into urban markets, the project will improve agricultural productivity, food security and profitability of agricultural enterprises.

The International Maize and Wheat Improvement Center (CIMMYT) will partner with the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) and the University of Florida, with the support of the CGIAR research program on Climate Change, Agriculture and Food Security (CCAFS).

Kindie Tesfaye, CIMMYT, presents an overview of climate services in Ethiopia. (Photo: Simret Yasabu /CIMMYT)

Physical and digital tools across the value chain

In October 2019, thirty partners gathered for the CASCAID-II project launch and meeting in Addis Ababa, Ethiopia. They agreed on the project goals, a set of priority research questions and a schedule of activities for the next two years.

Partners also reviewed the tools that could be used to deliver climate advisories and agricultural insurance products, ensuring that all the actors in the value chain are engaged from the start. Team members aim to embed services in existing physical and digital (“phygital”) data infrastructures and to collect user feedback, so performance can be improved. Users will be segmented according to advanced socioeconomic and agro-ecological factors, so they can be targeted more efficiently with appropriate services and climate-smart agriculture options. The project will draw on real-time and multi-scale yield forecasting for better preparedness and decision-making.

Project partners agreed to start with the CCAFS Regional Agricultural Forecasting Tool (CRAFT) for sub-national yield forecasting in Ethiopia and to develop climate advisories and insurance services in line with the needs of the Ministry of Agriculture.

Participants of the launch of the digital agro-climate advisory platform gather for a group photo. (Photo: Semu Yemane/EIAR)

Precise data from scientists to farmers

In a related development, Ethiopia recently launched a digital agro-climate advisory platform, which offers great potential to improve farmers’ management of climate-induced risks, facilitate technology adoption and improve livelihoods.

Speaking at the platform’s launch ceremony, Eyasu Abraha, advisor to the Minister of Agriculture, thanked development partners for supporting the establishment of the platform in the timely move towards digitalization and use of precise data.

The platform incorporates location-specific climate information, as well as soil- and crop-specific best-bet agronomic management recommendations for farmers, development agents and extension officers. It automates crop-climate modeling and uses technologies such as text messaging, interactive voice response (IVRS) and smartphone apps for dissemination.

Why Conserving Biodiversity Is Crucial to Prevent Future Pandemics

Written by Mary Donovan on April 14, 2020. Posted in In the media.

“Today, 7.8 billion humans exploit almost each and every ecosystem of the planet. Livestock have followed humans in most of these ecosystems and are now far more numerous than wild vertebrates,” Frederic Baudron, a systems agronomist at the International Maize and Wheat Improvement Centre, said in an interview. For example, there are 4.7 billion cattle, pigs, sheep and goats and 23.7 billion chickens on Earth. “We live on an increasingly ‘cultivated planet’, with new species assemblages and new opportunities for pathogens to move from one species to another.”

However, the biodiversity crisis is seldom considered a global issue and often not a pressing one, and conservationists say it isn’t written about as often as it should be. “Media coverage for the biodiversity crisis is eight-times lower than for the climate crisis”, according to Baudron. “We need to reduce the frequency of pandemics like COVID-19 by conserving and restoring biodiversity globally, most crucially in disease hotspots.”

A seed company representative explains to farmers the merits of the variety on this plot. (Photo: Joshua Masinde/CIMMYT)

Seeing is believing

Written by Rodrigo Ordóñez on April 3, 2020. Posted in Features.

Nancy Wawira strolls through a small plot of maize at Kithimu, in Kenya’s Embu County. She is charmed by the attributes of a maize variety that can yield 2,700kg per acre or more. The variety can endure drought-like conditions, matures in less than 120 days and has potential for double-cobbing.

Wawira is visiting a demonstration farm to witness the performance of several high yielding, early to medium maturing, drought-tolerant maize varieties.

By coming to this demonstration farm, Wawira hoped to identify a newer maize variety she could plant on her quarter-acre of land to get higher yield. The plot she stood on was the exact replica of what she was looking for. “Occasions such as this field day are very important for me and I always endeavor to attend them, as there is always something new to see or learn,” she says.

On her farm, she has been planting one of the old but popular commercial varieties suitable for this mid-altitude ecology. She normally harvests 4 bags of maize, of 90kg each, every season. However, if there is not enough rain or if there are pests or diseases, which is often the case, she harvests just 2 bags or less. This is hardly enough to meet her family’s food requirements for the year.

Switching to the maize variety she was interested in, and applying recommended farming practices, she could harvest 6 bags per season or more.

“Today, I have learnt how to improve my farming,” says Wawira. “Even when I access the variety that is high yielding, drought-tolerant and can mature in about three and a half months, as I witnessed on one of the plots, I still need to pay attention to proper crop husbandry related to spacing, timing of the planting, seed, fertilizer and pesticide application besides weed control,” she says.

Nancy Wawira examines maize in one of the demo plots. (Photo: Joshua Masinde/CIMMYT)

Made-to-order

Wawira was one of the more than 400 farmers from nearby Manyatta sub-county visiting the demonstration farm on February 7, 2020. They were able to see varieties and learn about their traits, invited by the Seed Trade Association of Kenya (STAK) with the support of the International Maize and Wheat Improvement Center (CIMMYT).

The demonstration is a continuation of the work started under the Drought Tolerant Maize for Africa Seed Scaling (DTMASS) project and later under the Stress Tolerant Maize for Africa (STMA) project.

Officials from Embu County, led by its minister in charge of agriculture Jamleck Muturi, were present during the farmers’ visit. Ten seed firms, some of which use CIMMYT’s germplasm for seed propagation and marketing, participated as well.

“Several of our member seed companies are showcasing the varieties developed through CIMMYT’s breeding pipeline,” said Duncan Ochieng’, the chief executive officer of STAK. “The maize varieties showcased on these demo farms were designed to be drought-tolerant, high yielding and range from early to medium maturing. These varieties are juxta-posted with other commercial varieties suitable for this region.”

During visits to demonstration farms, farmers give feedback on their variety preferences. Seed companies can then align their breeding, germplasm-access requests, seed production or marketing plans with farmers’ expectations.

Some of the farmers who participated in the field day in Embu County, Kenya. (Photo: Joshua Masinde/CIMMYT)

Jackline Wanja in one of the demo plots of the variety she liked. (Photo: Joshua Masinde/CIMMYT)

A seed company representative shows seeds to a farmer during the visit to the demonstration farm. (Photo: Joshua Masinde/CIMMYT)

STAK chief executive officer Duncan Ochieng’ examines a maize cob in one of the demo plots. (Photo: Joshua Masinde/CIMMYT)

Dire traits

Farming stresses such as pests, diseases, heat and drought have made targeted breeding a critical necessity.

Young farmers are increasingly choosing varieties that can mature faster, typically in less than three months. They also favor varieties that offer higher yield than the popular commercial varieties, many of which have been on the market for at least a decade. Other sought-after traits are good performance in low or erratic rains, tolerance to maize lethal necrosis, reduced lodging, and efficiency in nitrogen use.

Jackline Wanja, 25, relies on her one-acre farm for survival. “On average, I harvest about 25 bags per acre. On the demo farm, I got to know of a variety than can yield at least 30 bags per acre. I also learnt that the variety is not only drought-resilient but can also mature in about three and a half months. This is the variety that I plan to plant my farm next season,” Wanja said.

For John Njiru, 52, a higher-yielding variety with a lot of foliage, which remains green even after the maize cob has dried, is what he came looking for. For this farmer with 12 acres of land, the green maize foliage is a significant source of income when sold to livestock keepers. Njiru feeds his own livestock with it, making substantial savings on animal feed expenditure. “If this variety is as high yielding as I have been made to understand and can offer me at least 30 bags per acre, I would be a happy farmer. My farming would be very profitable,” he says.

John Njiru on a demo plot of the variety he liked. (Photo: Joshua Masinde/CIMMYT)

ICARDA’s Mustapha El-Bouhssini explains how crop pests are moving in a warming world

Written by Alison Doody on March 26, 2020. Posted in Videos. 2 Comments on ICARDA’s Mustapha El-Bouhssini explains how crop pests are moving in a warming world

Insect resistance in plants is needed now more than ever. The UN, which has named 2020 as the International Year of Plant Health, estimates that almost 40% of food crops are lost annually due to plant pests and diseases.

Earlier this month, a group of wheat breeders and entomologists came together for the 24th Biannual International Plant Resistance to Insects (IPRI) Workshop, held at the International Maize and Wheat Improvement Center (CIMMYT).

We caught up with Mustapha El-Bouhssini, principal scientist at the International Center for Agricultural Research in the Dry Areas (ICARDA) to discuss insect pests and climate change. He explains how pests such as the Hessian fly — a destructive wheat pest which resembles a mosquito — and the chickpea pod borer are extending their geographical ranges in response to rising temperatures.

One-minute science: Suchismita Mondal on breeding resilient wheat

Written by Rodrigo Ordóñez on March 19, 2020. Posted in Videos.

Reduced water availability for irrigation and increasing temperatures are of great concern. These two factors can considerably affect wheat production and reduce grain yields.

Watch CIMMYT Wheat Breeder Suchismita Mondal explain — in just one minute — how breeders are developing wheat varieties that have stable grain yield under low water availability and high temperatures.

In new hostile climate, drought-tolerant crops, systems needed on unprecedented scale

Written by Mary Donovan on March 12, 2020. Posted in In the media.

Last year, droughts devastated staple food crops across the developing world, cutting production by about half in some countries. A stream of reports from Central America, Eastern and Southern Africa as well as the Asia-Pacific region painted a grim picture of suffering and upheaval.

Extreme weather, with its appalling consequences, demands an extraordinary response. Redoubled efforts must focus on building resilience into the developing world´s major food systems.

Luganu Mwangonde (center, holding a microphone) shares her experience in climate-smart agriculture to inspire the next generation of farmers in Malula, Balaka District, Malawi.

Equal and climate-smart

Written by Shiela Chikulo on March 6, 2020. Posted in Features.

Sixteen years of consistent learning and practice of climate-smart agriculture, led by the International Maize and Wheat Improvement Center (CIMMYT), are paying off for Luganu Mwangonde. Together with her husband Kenson, she has established herself as a successful smallholder farmer in Malawi’s Balaka district. She enjoys the multiple benefits of high yields from diverse crops, surplus to sell at the markets and improved soil quality.

“I started practicing the farming that does not demand too much labor back in 2004,” she explains at her 2.5-acre farm. “Over the years the process has become easier, because I have a full understanding of the benefits of techniques introduced through the project.”

In Malawi’s family farms, women often carry the burden of land preparation and weeding in the fields while juggling household responsibilities, contributing to widen gender differences already prevalent in the community.

Mwangonde observes that learning climate-smart techniques — such as minimum tillage, mulching and planting on flat land surfaces — has given her an advantage over other farmers practicing conventional agriculture.

Better off

At the beginning, like other farmers in the area, Mwangonde thought conservation agriculture and climate-smart techniques required a lot of work, or even hiring extra labor. As she tried this new approach, however, weed pressure in her plot decreased gradually, with the help of mulching and other techniques, and the labor required to maintain the fields reduced significantly. This allowed her to have extra time to add value to her products and sell them on the markets — and to rest.

The best gain for her is knowing that her family always has enough to eat. “I have enough grain to last until the next harvest,” she says. “My husband and I can provide for our seven children and four grandchildren.” During the 2018/19 season, Mwangonde’s family harvested six bags of maize, two bags of pigeon pea and four bags of groundnuts. The surplus from the harvest is reserved for later, when prices are more competitive.

“I am an equal partner in the farming activities. That means I can make decisions about how we work on our plot, distribute crops and apply everything that I have learnt about conservation agriculture,” Mwangonde explains. She has participated in CIMMYT activities where she could share her experiences on climate-smart agriculture with other women. As a lead farmer, she notes, she can confidently inspire the next generation of smallholders because of the empowering knowledge she has acquired.

Out of the 3,538 smallholder farmers from Balaka, Machinga and Zomba districts, up to 2,218 are women smallholder farmers who have successfully adopted climate-smart technologies.

Mwangonde is one of the beneficiaries of the Africa Research in Sustainable Intensification for the Next Generation (Africa RISING) project. She also benefitted from the support of the German Development Agency (GIZ), the International Fund for Agricultural Development (IFAD), Total Land Care (TLC) and the United States Agency for International Development (USAID).

Explore our coverage of International Women’s Day 2020.

What will be the new face of European agriculture in the coming years?

Written by Mary Donovan on March 2, 2020. Posted in In the media.

Providing climate data that is useful for farmers is crucial for adapting Europe’s agriculture to weather and climate extremes. Several programmes within the Copernicus Climate Change Service (C3S) are tailoring their climate data and models to help agriculture respond better to climate change.

The International Maize and Wheat Improvement Center (CIMMYT) is using C3S data to improve crops; by looking at how the plants perform in various weather conditions, researchers focus on selecting cereal varieties resilient to drought and heat.

Pests and diseases and climate change: Is there a connection?

Written by Alison Doody on February 27, 2020. Posted in Features. 4 Comments on Pests and diseases and climate change: Is there a connection?

Responsible for 80% of the food we eat and 98% of the oxygen we breathe, plants are a pillar of life on earth. But they are under threat. Up to 40 percent of food crops are lost to plant pests and diseases each year according to the FAO.

When disease outbreaks occur, the impacts can be devastating. In the 1840s, the Irish potato famine, caused by the fungal disease late blight, killed around one million people and caused another million to emigrate.

The recent invasion of desert locusts throughout the horn of Africa – the worst in decades – shows how vulnerable crops are to pests as well.

The desert locust is one of the most destructive pests in the world, with one small swarm covering one square kilometer eating the same amount of food per day as 35,000 people. The outbreak could even provoke a humanitarian crisis, according to the FAO.

How does climate change affect pests and diseases?

Climate change is one factor driving the spread of pests and diseases, along with increasing global trade. Climate change can affect the population size, survival rate and geographical distribution of pests; and the intensity, development and geographical distribution of diseases.

Temperature and rainfall are the big drivers of shifts in how and where pests and diseases spread, according to experts.

“In general, an increase in temperature and precipitation levels favors the growth and distribution of most pest species by providing a warm and humid environment and providing necessary moisture for their growth,” says Tek Sapkota, agricultural systems and climate change scientist at the International Maize and Wheat Improvement Center (CIMMYT).

However, when temperatures and precipitation levels get too high, this can slow the growth and reproduction of some pest species and destroy them by washing their eggs and larvae off the host plant, he explains.

This would explain why many pests are moving away from the tropics towards more temperate areas. Pests like warmer temperatures – but up to a point. If it is too hot or too cold, populations grow more slowly. Since temperate regions are not currently at the optimal temperature for pests, populations are expected to grow more quickly in these areas as they warm up.

Crop diseases are following a similar pattern, particularly when it comes to pathogens like fungi.

Movement towards the earth’s poles

Research shows that since 1960, crop pests and diseases have been moving at an average of 3 km a year in the direction of the earth’s north and south poles as temperatures increase.

Tar spot, a fungal disease native to Latin America, which can cause up to 50% of yield losses in maize, was detected for the first time in the US in 2015. Normally prevalent in tropical climates, the disease has started emerging in non-tropical regions, including highland areas of Central Mexico and many counties in the US.

Maize-producing counties in the USA vulnerable to tar spot complex (TSC) calculated based on climate similarity. Khondoker Mottaleb et al. 2018

The southern pine beetle, one of the most destructive insects invading North America, is moving north as temperatures rise and is likely to spread throughout northeastern United States and into southeastern Canada by 2050.

Wheat stem rust was reported by the Greeks and Romans, and the latter sacrificed to the gods to avoid disease outbreaks on their wheat crops. Photo: CIMMYT/Petr Kosina

Wheat rusts, which are among the greatest threats to wheat production around the world, are also adapting to warmer climates and becoming more aggressive in nature, says Mandeep Randhawa, CIMMYT wheat breeder and wheat rust pathologist.

“As temperatures rise, larger quantities of spores are produced that can cause further infection and could potentially result in pathogenic changes through faster rate of their evolution.”

Scientists recently reported that stem rust had emerged in the UK for the first time in 60 years. Climate changes over the past 25 years are likely to have encouraged conditions for infection, according to the study.

Rising CO2 levels

Rising carbon dioxide (CO2) levels could also affect pests indirectly, by changing the architecture of their host plant and weakening its defenses.

“Elevated CO2 concentrations, as a result of human activity and influence on climate change, will most likely influence pests indirectly through the modification in plant chemistry, physiology and nutritional content,” says Leonardo Crespo, CIMMYT wheat breeder.

Rising CO2 concentrations and temperatures could also provide a more favorable environment for pathogens like fungi, reports the International Panel on Climate Change (IPCC).

Despite high confidence among scientists that climate change will cause an increase in pests and diseases, predicting exactly when and where pests and diseases will spread is no easy task. There is significant variation between different species of pests and types of pathogens, and climate models can only provide estimates of where infection or outbreaks might occur.

Keeping pests and disease pandemics at bay

To address these uncertainties, experts increasingly recognize the need to monitor pest and disease outbreaks and have called for a global surveillance system to monitor these and improve responses.

Recent technological tools like the suitcase-sized mobile lab MARPLE, which tests pathogens such as wheat rust in near real-time and gives results within 48 hours, allow for early detection. Early warning systems are also crucial tools to warn farmers, researchers and policy makers of potential outbreaks.

Breeding pest- and disease-resistant varieties is another environmentally friendly solution, since it reduces the need for pesticides and fungicides. Collaborating with scientists worldwide, CIMMYT works on developing wheat and maize varieties resistant to diseases, including Fusarium Head Blight (FHB), wheat rust, wheat blast for wheat and maize lethal necrosis (MLN) for maize.

A ladybug (or ladybird) beetle sits on a wheat spike of an improved variety growing in the field in Islamabad, Pakistan. Photo credit: A. Yaqub/CIMMYT.

Beneficial insects can also act as a natural pest control for crops. Ladybugs, spiders and dragonflies act as natural predators for pests like aphids, caterpillars and stem borers. Other solutions include mechanical control measures such as light traps, pheromone traps and sticky traps, as well as farming practice controls such as crop rotation.

The United Nations has declared this year as the International Year of Plant Health, emphasizing the importance of raising global awareness on how “protecting plant health can help end hunger, reduce poverty, protect biodiversity and the environment, and boost economic development.”

As part of this initiative, CIMMYT will host the 24^th Biannual International Plant Resistance to Insects (IPRI) conference from March 2-4. The conference will cover topics including plant-insect interactions, breeding for resistance, and phenotyping technologies for predicting pest resistant traits in plants.

Cover photo: A locust swarm in north-east Kenya. The UN Food and Agriculture Organization has warned that the swarms already seen in Somalia, Kenya and Ethiopia could range further afield. Photograph: Sven Torfinn/FAO

Smartphones drive data collection revolution, boost climate-smart agriculture in Bangladesh

Written by Matthew O'Leary on February 20, 2020. Posted in News.

Farmer receiving information from a phone-based service. (Photo: Michelle DeFreese/CIMMYT)

Agricultural research is entering a new age in Bangladesh. The days, months and years it takes to collect farm data with a clipboard, paper and pen are nearing their end.

Electronic smartphones and tablets are gaining ground, used by researchers, extension workers and farmers to revolutionize the efficiency of data collection and provide advice on best-bet practices to build resilient farming systems that stand up to climate change.

Digital data collection tools are crucial in today’s ‘big data’ driven agricultural research world and are fundamentally shifting the speed and accuracy of agricultural research, said Timothy Krupnik, Senior Scientist and Systems Agronomist at the International Maize and Wheat Improvement Center (CIMMYT).

“Easy-to-use data collection tools can be made available on electronic tablets for surveys. These allow extension workers to collect data from the farm and share it instantaneously with researchers,” he said.

“These tools allow the regular and rapid collection of data from farmers, meaning that researchers and extension workers can get more information than they would alone in a much quicker time frame.”

“This provides a better picture of the challenges farmers have, and once data are analyzed, we can more easily develop tailored solutions to farmers’ problems,” Krupnik explained.

Through the USAID and Bill and Melinda Gates supported Cereal Systems Initiative for South Asia (CSISA), and the CGIAR Research Program on Climate Change, Agriculture and Food Security (CCAFS) supported Big Data Analytics for Climate-Smart Agriculture in South Asia projects, 125 Department of Agricultural Extension (DAE) agents were trained throughout Bangladesh to use tablets to gather agronomic information from rice and wheat farmers.

It is the first time extension workers have been involved in data collection in the country. Since the pilot began in late 2019, extension workers have collected data from over 5,000 farmers, with detailed information on climate responses, including the management of soil, water and variety use to understand what drives productivity. The DAE is enthused about learning from the data, and plans to collect information from 7,000 more farmers in 2020.

Bangladesh’s DAE is directly benefiting through partnerships with expert national and international researchers developing systems to efficiently collect and analyze massive amounts of data to generate relevant climate-smart recommendations for farmers, said the department Director General Dr. M. Abdul Muyeed.

Workers spread maize crop for drying at a wholesale grain market. (Photo: Dreamstime.com)

For the first time widespread monitoring examines how farmers are coping with climate stresses, and agronomic data are being used to estimate greenhouse gas emissions from thousands of individual farmers. This research and extension partnership aims at identifying ways to mitigate and adapt to climate change, he explained.

“This work will strengthen our ability to generate agriculturally relevant information and increase the climate resilience of smallholder farmers in Bangladesh,” Dr. Muyeed said.

Next-gen big data analysis produces best-bet agricultural practices

“By obtaining big datasets such as these, we are now using innovative research methods and artificial intelligence (AI) to examine patterns in productivity, the climate resilience of cropping practices, and greenhouse gas emissions. Our aim is to develop and recommend improved agricultural practices that are proven to increase yields and profitability,” said Krupknik.

The surveys can also be used to evaluate on-farm tests of agricultural technologies, inform need-based training programs, serve local knowledge centers and support the marketing of locally relevant agricultural technologies, he explained.

“Collecting farm-specific data on greenhouse gas emissions caused by agriculture and recording its causes is a great step to develop strategies to reduce agriculture’s contribution to climate change,” added Krupnik.

Global greenhouse gas emissions from the food system

Written by Rodrigo Ordóñez on February 20, 2020. Posted in Infographics.

Global schemes to fight climate change may miss their mark by ignoring the “fundamental connections” in how food is produced, supplied and consumed, say scientists in a new paper published in the journal Nature Food. Global bodies such as the Intergovernmental Panel on Climate Change (IPCC) and the UN Framework Convention on Climate Change (UNFCCC), handle the different components of the food system separately. This includes crop and livestock production; food processing, storage and transport; and food consumption. Scientists argue this disjointed approach may harm strategies to reduce food emissions and safeguard food from climate impacts, and that a “comprehensive” and “unified” approach is needed.

Food and climate change are deeply interlinked, but food emissions need to be tracked beyond the “farm gate,” that is, beyond the emissions arising from growing crops or raising livestock. Researchers are uncovering new insights on how the different subcomponents of the food system contribute to climate change mitigation and adaptation. They argue that we must understand how these components work together — or clash in some cases — in order to effectively address agriculture in a changing climate.

Read more:
Rosenzweig C et al. 2020. Climate change responses benefit from a global food system approach. Nature Food.