Tag: post-harvest

No Stones, No Grit! A game-changing technology to process small grain introduced in Zimbabwe

Written by Julian Bañuelos-Uribe on March 12, 2024. Posted in Blogs.

Farmers thresh wheat at an irrigation scheme. (Photo: CIMMYT)

In Zimbabwe, the traditional, laborious, and time-consuming small grain processing may soon belong to the past, thanks to a game-changing technology: a multi-crop thresher. This scale-appropriate machine offers a smarter and less strenuous way to produce high-quality small-grain meals, including in drought-prone regions, without being contaminated with sand or stone particles.

“One of the main impediments to large-scale adoption of sorghum and millet in drought-prone areas is the laborious task of threshing. This has been solved by introducing multi-crop threshers, which form a central part in the business of mechanization service providers in rural Zimbabwe”, says Christian Thierfelder, principal scientist and project lead for the Mechanization and Extension Activity.

The introduction of the multi-crop thresher not only alleviates the physical strain of manual threshing but also enhances the overall quality of small-grain products. This innovation is a crucial step forward in promoting the production and consumption of small grains in Zimbabwe, contributing to food security and improved livelihoods for farmers.

This innovation was introduced by the Feed the Future Mechanization and Extension Activity, implemented by CIMMYT and funded by the United States Agency for International Development (USAID), to address the challenges of traditional small grain processing and offer new market opportunities to farmers.

Small grain production and consumption has traditionally been a household favorite in Zimbabwe due to its rich nutritional content. However, the sand content and gritty texture, often associated with sorghum or millet meals, have led to a decline in consumers’ interest in it. The main culprit? The traditional method of manual threshing on the soil, a strenuous and time-consuming process that incorporates sand and gravel particles into the threshed grains (and then into flours), resulting in an unpleasant eating experience.

In Zimbabwe and across the region, small grain processing has been characterized by the arduous task of manual threshing using sticks. Women, often at the forefront of this task, repeatedly beat the heads of small grains on hard surfaces, such as granite or hard clay, to separate the grains. Despite efforts to minimize contamination by threshing them into sacks or on plastic sheets, the gritty taste persists. The subsequent winnowing, roasting, and milling do little to eliminate tiny soil and stone particles from the final product (flour) as physical separation is technically challenging.

The multi-crop thresher for smooth results

“Powered by an 8 HP diesel engine, the multi-crop thresher is a perfect machine to process sorghum, millets, maize (husked or un-husked), wheat, cowpea, sugar beans, and soybean,” says Abdul Matin, mechanization specialist and technical lead of the Mechanization and Extension Activity. “It is locally made in Zimbabwe and designed to promote mechanization as a business as it can easily be transported. It has high threshing efficiency, is fuel-efficient, easy to operate, and women friendly.”

The operator simply feeds the crop into the inlet hopper, and as it passes through the threshing drum, the machine efficiently separates the grain from the chaff, releasing clean grain through the outlet chute. “The thresher will help reduce decline of small grain production in the country and complement government efforts to expand its cultivation in Natural Regions IV and V in Zimbabwe,” Matin added. When operating the machine efficiently, one can thresh up to 0.5 tons per hour for small grains.

The multi-crop thresher, a vital component of climate-resilient agriculture

The multi-crop thresher is an efficient post-harvest machine that can process various grains. (Photo: CIMMYT)

CIMMYT organized awareness meetings, including the 2023 Seed and Mechanization Fairs, for farmers to witness the speed and quality performance of the multi-crop thresher. They could also assess the quality of pearl millet processed using the thresher and others threshing wheat in an irrigation scheme showcasing the efficiency of the process and improved grain quality.

“In our region, harvesting small grains was always laborious,” explains Paidamoyo Kaseke from Ward 4 in Chimanimani district, Manicaland province. “But thanks to the multi-crop thresher, it’s now much easier. It operates quickly and efficiently, delivering clean grains that we can promptly take to the mill. This technology has revolutionized our harvesting process, significantly reducing the time and effort required.”

“Not only do we promote new and effective technologies such as the multi-crop thresher in the project, but we also seek solutions for farmers without high incomes to be able to afford the thresher. That is why we are partnering with two Zimbabwean banks to make small-scale loans accessible to farmers at affordable rates and tenure times. This way, we can effectively scale the access to scale-appropriate mechanization solutions.” says Leon Jamann, chief of party for the Mechanization and Extension Activity.

As the 2023-2024 farming season has been dry with erratic rainfall, rainfed dependent farmers already face drought in large areas of Zimbabwe. However, the promotion of more climate-resilient small grains in 2023—declared by the United Nations the International Year of Millets—emphasizes their adaptability to climate change and their high nutritional value. The multi-crop thresher, a vital component of this initiative, ensures that farmers can efficiently process small grains despite the challenging climate conditions.

Examining how insects spread toxic fungi

Written by Julian Bañuelos-Uribe on January 23, 2024. Posted in Blogs, Explainers.

Maize grain heavily damaged by the larger grain borer and maize weevil. (Photo: Jessica González/CIMMYT)

According to the World Health Organization (WHO), 10% of the global population suffers from food poisoning each year. Aflatoxins, the main contributor to food poisoning around the world, contaminate cereals and nuts and humans, especially vulnerable groups like the young, elderly, or immune-compromised, and animals are susceptible to their toxic and potentially carcinogenic effects.

Fungi contamination occurs all along the production cycle, during and after harvest, so the mitigation of the mycotoxins challenge requires the use of an integrated approach, including the selection of farmer-preferred tolerant varieties, implementing good agricultural practices such as crop rotation or nitrogen management, reducing crop stress, managing pests and diseases, biological control of mycotoxigenic strains, and good post-harvest practices.

Monitoring of mycotoxins in food crops is important to identify places and sources of infestations as well as implementing effective agricultural practices and other corrective measures that can prevent outbreaks.

A bug problem

Insects can directly or indirectly contribute to the spread of fungi and the subsequent production of mycotoxins. Many insects associated with maize plants before and after harvest act as a vector by carrying fungal spores from one location to another.

International collaboration is key to managing the risks associated with the spread of invasive pests and preventing crop damage caused by the newly introduced pests. CIMMYT, through CGIAR’s Plant Health initiative, partners with the Center for Grain and Animal Health Research of the US Department of Agriculture (USDA) and Kansas State University are investigating the microbes associated with the maize weevil and the larger grain borer.

The experiment consisted of trapping insects in three different habitats, a prairie near CIMMYT facilities in El Batán, Texcoco, Mexico, a maize field, and a maize store at CIMMYT’s experimental station at El Batán, using Lindgren funnel traps and pheromones lures.

Hanging of the Lindgren funnel traps in a prairie near El Bátan, Texcoco, Mexico. (Photo: Jessica González/CIMMYT)

Preliminary results of this study were presented by Hannah Quellhorst from the Department of Entomology at Kansas State University during an online seminar hosted by CIMMYT.

The collected insect samples were cultured in agar to identify the microbial community associated with them. Two invasive pests, the larger grain bore and the maize weevil, a potent carcinogenic mycotoxin was identified and associated with the larger grain borer and the maize weevil.

The larger grain borer is an invasive pest, which can cause extensive damage and even bore through packaging materials, including plastics. It is native to Mexico and Central America but was introduced in Africa and has spread to tropical and subtropical regions around the world. Together with the maize weevil, post-harvest losses of up to 60% have been recorded in Mexico from these pests.

“With climate change and global warming, there are risks of these pests shifting their habitats to areas where they are not currently present like sub-Saharan Africa and North Africa,” said Quelhorst. “However, the monitoring of the movement of these pests at an international level is lacking and the microbial communities moving with these post-harvest insects are not well investigated.”

Why we need to go beyond technology

Written by mcallejas on December 13, 2023. Posted in In the media.

To combat food loss and waste, Sylvanus Odjo post-harvest specialist at CIMMYT and Heike Ostermann post-harvest expert at Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) argue for a comprehensive approach that goes beyond single solutions such as storage technologies.

Read the full story.

Solar powered dryers boost peanut production in Togo

Written by Sarah McLaughlin on February 3, 2023. Posted in Features.

Solar powered peanut dryers in Togo are helping women-run cooperatives reduce their workload and increase their profits.

A number of West African countries have climate and soil well-suited to groundnut cultivation. In the second half of the twentieth century, the region became a world leader in peanut production. In Togo, peanuts do well, but problems with postharvest processing have kept this crop performing well below its potential.

However, the introduction of the solar powered dryers has had a significant positive impact on the production and preservation of a vital crop for the local population.

From peanut stews and sauces that are staples of national cuisine to overseas export of peanut products, there is no shortage of uses for this groundnut in Togo. However, smallholding farmers struggle to preserve their entire crop in large part because of aflatoxins, which thrive when conditions are too moist and ruin peanuts.

“Peanuts are a very perishable commodity and they can spoil if not stored properly for processing,” said Aïssetou Koura, president of the peanut farmer cooperative in Koumonde.

This is particularly true for smallholding peanut farmers, which in Togo includes many women. The established method for drying peanuts is to lay them out in the open air, which is a labor-intensive process that leaves the crop exposed to unexpected rains and contamination by pests. “In the past, we suffered huge losses,” Aïssetou explained.

Aicha Gaba from the N’kani N’kana cooperative works with a solar dryer in Koumonde, Togo. (Photo: Laré B. Penn/University of Lome)

A better way to dry

In 2021, the introduction of solar dryers began to change things dramatically for peanut farmers in cooperatives from Tovegan to Dapaong. In collaboration with the United Nations Food and Agriculture Organization (FAO), the Green Innovation Centers for the Agriculture and Food Sector (GIC) in Togo helped a local manufacturer, Guema Concept, develop solar dryer technology for local peanut farmers from plans made by the University of Hohenheim.

Launched in 2014 by Germany’s Federal Ministry for Economic Cooperation and Development’s special initiative One World No Hunger, GIC collaborates with the International Maize and Wheat Improvement Center (CIMMYT) to increase agricultural mechanization in 14 countries in Africa and two in Asia.

The dryers are equipped with a ventilation system and a power kit that includes solar panels and a battery so they can operate during periods of reduced sunlight. They have a capacity of 12 kilograms and can complete a drying cycle in as little as two hours, which is about one quarter of the time a manual drying cycle takes. Depending on the solar exposure, cooperatives like the one in Koumonde can perform three or four cycles in a day.

“We have found a solution by preserving our products with the solar dryer,” Aïssetou said.

GIC has helped five smallholding farmer cooperatives procure solar dyers across Togo, and more than 50 women farmers are members of these groups whose work is benefitting from this technology.

Farmers like Aicha Gaba are also increasing their profit because the solar dryers allow them to do more work with fewer laborers.

“Our cooperative dries peanuts with only two people via the solar dryer, unlike conventional open drying, which requires five people to spread, turn, monitor and collect the peanuts,” Gaba said.

“This process reduces the workers’ wages and then saves us the money of three workers, which is a good thing for us.”

The new technology is producing better peanuts thanks to consistent moisture and temperature levels and faster processing speeds, said Djéri Bossa, a member of the cooperative in Bassar.

“Thanks to the solar dryers offered by GIC Togo, we can freely dry our products in good conditions,” Bossa explained.

“The products derived from the processing of peanuts are of improved quality, unlike the conventional open-drying method we used.”

All is not sunny

Despite the initial success of the solar dryers, there are challenges that remain for scaling up this innovation. The dyers are quite heavy and, for smallholding women, it can be difficult to maneuver the machines by themselves. At the same time, farmers say that – even with the greater volume the dryers have helped them achieve – they would still like a higher-capacity machine.

But even with the need for lighter, harder-working dryers, there is enormous potential for this innovation to spread to new areas, bring additional production and income to smallholding farmers (including many women), and help make groundnuts a bigger piece of the economic pie in Togo.

Cover photo: Smallholding peanut farmers Aicha Gaba and Aïssetou Koura lay peanuts into a solar dryer in Koumonde, Togo. (Photo: Laré B. Penn/University of Lome)

Thank you to our partners, Laré B. Penn (University of Lomé) and Johanna Steinkuehler (GIZ Togo).

A farmer empties a metal silo filled with maize grain in Embu, Kenya. (Photo: CIMMYT)

Who benefits?

Written by Emma Orchardson on December 11, 2020. Posted in Publications.

Maize post-harvest losses in smallholder farming systems in sub-Saharan Africa have been shown to result in significant costs at household and national level, making it difficult to move towards achievement of SDG2 – Zero Hunger.

Within smallholder farming systems, new grain storage technologies such as metal silos can help reduce these losses during storage. However, technologies are often introduced into systems with complex sets of relationships, which may differentially affect the ability of women and men to secure the expected benefits. This, in turn, can have a knock-on effect on adoption rates and expected outcomes.

A recent study by an international team of researchers investigated whether modern storage structures such as metal silos provide equal benefits to women and men farmers in sub-Saharan Africa, using a mixed methods approach to explore the relationships governing maize production and storage in Kenya, Malawi, Zambia and Zimbabwe, where 1717 metal silos have been introduced through the Effective Grain Storage Project (EGSP).

The authors used random sampling to carry out quantitative surveys on metal silo owners in Kenya (124 respondents) and Malawi (100 respondents). Qualitative surveys using purposive sampling were also conducted in all four countries covering 14 ethnic groups using focus group discussions (360 respondents), key informant interviews (62 respondents), and household case studies (62 respondents). “Our aim was to understand gendered post-harvest management and storage strategies in traditional systems and to map changes when metal silos were introduced,” explain the authors.

“We hypothesized that existing gender norms might differentially influence women’s ability to benefit from the introduction of metal silos and our findings seem to indicate that this is correct. In most instances when metal silos are introduced, ownership of the grain storage facility and any benefits attached to that ownership typically switch from women to men, or men’s existing control over stored maize is deepened.”

A farmer from Embu, Kenya, demonstrates how to load maize grain into a metal silo for storage. (Photo: CIMMYT)

Their findings highlight that roles and responsibilities regarding the ownership and management of storage structures are strongly gendered. Though there are differences between ethnic groups and countries, overall men benefit more than women from the introduction of metal silos. Ownership of a grain storage facility and the benefits attached to this ownership can switch from women to men, with women having less scope for bargaining over their rights to use the stores for their own needs and the benefit of all household members.

Many of the women interviewed suggested that this compromised their ability to access sufficient maize because men might insist on taking any grain set aside to meet their personal needs. “We did not measure how much grain is taken and whether food security is indeed negatively affected, but our research registers that women are concerned about this issue.”

The qualitative research explored whether ownership over the granary — and control over the maize stored within — changed when metal silos were purchased. In all four countries, cultural norms tend to result in men typically owning all large household assets such as land, water pumps, ox-ploughs and carts, etc. They generally make key decisions about how these assets are to be used as well. Furthermore, the income differential between women and men in male-headed households means that it is considerably more difficult for women than men to make a large purchase like a metal silo. “As a consequence of these factors, we found men were more likely to own metal silos in each country.”

There is some differentiation between ethnic groups. In Zimbabwe, for example, Zezuru women who had previously owned and managed a dura — a traditional granary — lost control over maize grain reserves when metal silos were introduced. But for Korekore women nothing changed: men had always controlled traditional storage technologies and the maize within, and they continued to do so when metal silos were introduced. These examples highlight the fact that despite the cultural differences between ethnic groups, Zimbabwean women lost out across the board when metal silos were introduced, either through losing control over storage structures, or because male ownership was not challenged.

In light of these findings, the authors argue that understanding social context is key to designing and disseminating post-harvest technologies that meet the needs and preferences of both men and women farmers in various cultural contexts.

Their results make a strong case for ensuring that agricultural policy-makers prioritize the provision of equal access to improved technologies, as this is crucial not only for supporting women to meet their individual production goals, but also for ensuring that household-level food security needs are met.

Read the full study “Do metal grain silos benefit women in Kenya, Malawi, Zambia and Zimbabwe?” in the Journal of Stored Products Research.

A member of an agricultural mechanization youth association in Ethiopia’s Tigray region fills a two-wheel tractor with water before irrigation. (Photo: Simret Yasabu/CIMMYT)

The beginning of a beautiful partnership

Written by Emma Orchardson on November 11, 2020. Posted in Features.

In most developing countries, smallholder farmers are the main source of food production, relying heavily on animal and human power. Women play a significant role in this process — from the early days of land preparation to harvesting. However, the sector not only lacks appropriate technologies — such as storage that could reduce postharvest loss and ultimately maximize both the quality and quantity of the farm produce — but fails to include women in the design and validation of these technologies from the beginning.

“Agricultural outputs can be increased if policy makers and other stakeholders consider mechanization beyond simply more power and tractorization in the field,” says Rabe Yahaya, an agricultural mechanization expert at CIMMYT. “Increases in productivity start from planting all the way to storage and processing, and when women are empowered and included at all levels of the value chain.”

In recent years, mechanization has become a hot topic, strongly supported by the German Federal Ministry for Economic Cooperation and Development (BMZ). Under the commission of BMZ, the German development agency GIZ set up the Green Innovation Centers (GIC) program, under which the International Maize and Wheat Improvement Center (CIMMYT) supports mechanization projects in 16 countries — 14 in Africa and two in Asia.

As part of the GIC program, a cross-country working group on agricultural mechanization is striving to improve knowledge on mechanization, exchange best practices among country projects and programs, and foster links between members and other mechanization experts. In this context, CIMMYT has facilitated the development of a matchmaking and south-south learning matrix where each country can indicate what experience they need and what they can offer to the others in the working group. CIMMYT has also developed an expert database for GIC so country teams can reach external consultants to get the support they need.

“The Green Innovation Centers have the resources and mandate to really have an impact at scale, and it is great that CIMMYT was asked to bring the latest thinking around sustainable scaling,” says CIMMYT scaling advisor Lennart Woltering. “This is a beautiful partnership where the added value of each partner is very clear, and we hope to forge more of these partnerships with other development organizations so that CIMMYT can do the research in and for development.”

This approach strongly supports organizational capacity development and improves cooperation between the country projects, explains Joachim Stahl, a capacity development expert at CIMMYT. “This is a fantastic opportunity to support GIZ in working with a strategic approach.” Like Woltering and Yahaya, Stahl is a GIZ-CIM integrated expert, whose position at CIMMYT is directly supported through GIZ.

A catalyst for South-South learning and cooperation

Earlier this year, CIMMYT and GIZ jointly organized the mechanization working group’s annual meeting, which focused on finding storage technologies and mechanization solutions that benefit and include women. Held from July 7–10 July, the virtual event brought together around 60 experts and professionals from 20 countries, who shared their experiences and presented the most successful storage solutions that have been accepted by farmers in Africa for their adaptability, innovativeness and cost and that fit best with local realities.

CIMMYT postharvest specialist Sylvanus Odjo outlined how to reduce postharvest losses and improve food security in smallholder farming systems using inert dusts such as silica, detailing how these can be applied to large-scale agriculture and what viable business models could look like. Alongside this and the presentation of Purdue University’s improved crop storage bags, participants had the opportunity to discuss new technologies in detail, asking questions about profitability analysis and the many variables that may slow uptake in the regions where they work.

Harvested maize cobs are exposed to the elements in an open-air storage unit in Ethiopia. (Photo: Simret Yasabu/CIMMYT)

Discussions at the meeting also focused heavily on gender and mechanization – specifically, how women can benefit from mechanized farming and the frameworks available to increase their access to relevant technologies. Modernizing the agricultural sector in developing countries in ways that would benefit both men and women has remained a challenge for many professionals. Many argue that the existing technologies are not gender-sensitive or affordable for women, and in many cases, women are not well informed about the available technologies.

However, gender-sensitive and affordable technologies will support smallholder farmers produce more while saving time and energy. Speaking at a panel discussion, representatives from AfricaRice and the Food and Agriculture Organization of the United Nations (FAO) highlighted the importance of involving women during the design, creation and validation of agricultural solutions to ensure that they are gender-sensitive, inclusive and can be used easily by women. Increasing their engagement with existing business models and developing tailored digital services and trainings will help foster technology adaptation and adoption, releasing women farmers from labor drudgery and postharvest losses while improving livelihoods in rural communities and supporting economic transformation in Africa.

Fostering solutions

By the end of the meeting, participants had identified and developed key work packages both for storage technologies and solutions for engaging women in mechanization. For the former, the new work packages proposed the promotion of national and regional dialogues on postharvest, cross-country testing of various postharvest packages, promotion of renewable energies for power supply in storing systems and cross-country scaling of hermetically sealed bags.

To foster solutions for women in mechanization, participants suggested the promotion and scaling of existing business models such as ‘Woman mechanized agro-service provider cooperative’, piloting and scaling gender-inclusive and climate-smart postharvest technologies for smallholder rice value chain actors in Africa, and the identification and testing of gender-sensitive mechanization technologies aimed at finding appropriate tools or approaches.

Cover image: A member of Dellet – an agricultural mechanization youth association in Ethiopia’s Tigray region – fills a two-wheel tractor with water before irrigation. (Photo: Simret Yasabu/CIMMYT)

Beyond breeding: the potential of improved postharvest storage techniques for smallholder farmers

Written by Steven M on October 23, 2020. Posted in Features.

In the early days of organizations like the International Maize and Wheat Improvement Center (CIMMYT), the answer to improving global food security was obvious. Help people grow more food. Today the situation is far more complex. Many exciting developments in breeding are either protective or corrective in nature. Stress-tolerant seed varieties are meant to help protect against the worst effects of global climate change. Efforts to develop widely cultivatable, high-yielding varieties based on local landraces seek to reintroduce some of the biodiversity lost through the runaway success of just a handful of commercial varieties.

Yet problems of food insecurity and poverty persist, not least among smallholders. The good news is that it is precisely among these farmers that important gains remain to be made, especially if we consider the many steps from planting to final consumption where technical and processual improvements can be made. “Just having a seed is not sufficient,” said CIMMYT postharvest specialist Sylvanus Odjo. “Of course having good seed is important, but you also need good agronomic practices.”

Globally, Odjo pointed out, one third of agricultural production is lost in the postharvest phase. In tropical Mexico, postharvest losses among smallholder maize farmers can reach up to 40%.

As the recently published findings of a two-year-long research project led by CIMMYT researchers show, such losses are entirely avoidable. The study, which was conducted in 2017 and 2018 across dozens of sites in Mexico representing a broad range of altitudes and ecologies, tested multiple storage technologies to determine which are most effective at avoiding postharvest losses using real-world smallholder practices and regardless of climatic and environmental factors.

Men fill hermetic metal silo. — Filling hermetic metal silo in Peto, Yucatán. (Photo: CIMMYT)

Researchers compared storage outcomes using conventional methods such as storing untreated maize in 50 kg polypropylene bags, storing maize in polypropylene bags and treating it with one of various agents — including aluminum phosphide, deodorized malathion or inert dusts — and hermetic storage options such as hermetic metal silos, two types of GrainPro hermetic plastic bags, and low-cost alternatives like plastic bottles and silage bags.

Under controlled conditions, they found that loss outcomes were highly variable for conventionally stored maize, with or without treatment agents. While untreated grain stored in polypropylene bags in temperate conditions at Texcoco only exhibited only 2.2% insect-damaged maize, grain treated with aluminum phosphide and stored in conventional bags in tropical conditions at Cotzocón suffered 46.3% insect damage.

In contrast, maize stored in low-cost hermetic alternatives such as plastic bottles and silage bags exhibited a maximum of 1.2% insect-damaged grain across all sites. Hermetic metal silos and GrainPro bags performed similarly well across climates, with a couple of important exceptions. The percentage of insect-damaged grain for maize stored in hermetic metal silos at Zacaultipán was 13.5%. Maize stored in GrainPro bags at this site suffered 8.1% insect damage.

Overall, the study convincingly demonstrated the effectiveness of hermetic storage technologies at minimizing insect and mycotic damage as well as weight loss of stored maize regardless of climate or altitude. However, important obstacles to the effective adoption of the technologies remains. In the case of the hermetic metal silos, it was determined that despite the existence of a stringent national norm for their construction in Mexico, silos occasionally did not meet the national standard and had to retrofitted to ensure hermeticity. And, as the example of Zacaultipán demonstrated, poor pre-storage processing of grain can compromise the effectiveness of hermetic storage technologies.

Maize storage. — CIMMYT researchers tested multiple storage technologies to determine which are most effective at avoiding postharvest losses. (Photo: CIMMYT)

Over the course of carrying out the experiment, the researchers discovered other challenges. In Mexico, as is often true among smallholders globally, women are largely in charge of postharvest activities. “But we noticed that it was largely men who showed up to the trainings,” Odjo said. Researchers had to think of strategies—from being more careful about meeting timings to enlisting the support of local women leaders—to ensure that the trainings were reaching the women who actually carry out this work.

As Odjo pointed out, resolving these kinds of implementation and advocacy challenges—from ensuring adequate training and familiarity with the technologies on the ground to encouraging public and private sector partners to make the technologies more broadly available—is the next step for the project. “The less complex part of this work is the technical part,” he said. “Our job now at CIMMYT is to bring these innovations to farmers… We need to get all the relevant stakeholders involved in the game.”

The project was carried out in partnership with the Mexican government via MasAgro, and received funding from the CGIAR Research Program on Maize (MAIZE). Its implementation involved collaboration with dozens of local partners throughout Mexico and was carried out in response to the suggestions of smallholder farmers.

Read the full paper: Hermetic storage technologies reduce maize pest damage in smallholder farming systems in Mexico

This story was originally published on the MAIZE website.

Cover image: Evaluating grain quality after six months of storage in Venustiano Carranza, Chiapas. (Photo: CIMMYT)

Breaking Ground: Sylvanus Odjo finds the right technology for each farmer

Written by Emma Orchardson on April 16, 2020. Posted in Features.

A series of coincidences led Sylvanus Odjo to study agronomy. It was only after finishing his first degree that he learned that his namesake, Silvanus, was the Latin deity of forests and fields.

Spurred by a curiosity about the natural world, he spent several years working at the National Institute of Agriculture in his native Benin, before pursuing advanced degrees in Belgium, where he developed his interest in cereals research.

“Obviously by that point I knew about the CGIAR centers and the International Maize and Wheat Improvement Center,” he explains. “If you’re working on maize, you’ll know about CIMMYT.”

He joined the organization as a postdoctoral researcher in 2017 and now works as a postharvest specialist. He coordinates a network of platforms which evaluates and validates potential solutions and transfers them to farmers across Mexico and Latin America.

“All the projects I’m working on now have the same objective: finding ways to avoid and reduce postharvest losses.” These, Odjo estimates, can be as high as 40% in some parts of Mexico, with dramatic consequences for smallholder farmers whose food security is directly linked to the amount of grain they have. They are also the most likely to be affected by the effects of climate change.

“A lot of people think postharvest just means storage,” he points out, “but it actually encompasses everything from the moment of harvest and includes processes like drying, shelling, technical and economic activities.”

A drying specialist by training, Odjo now works across the entire postharvest system. There are two central components to his work. The first involves testing postharvest technologies to develop recommendations for farmers, conducting trials under controlled conditions on CIMMYT research stations and with local collaborators across Mexico and assessing how drying and storage technologies fare under different conditions. The second, and perhaps more challenging, is promoting the successful ones, such as hermetic grain storage bags, among farmers and providing training on how to use them appropriately.

“We see a lot of publications agreeing that we need to promote hermetic technologies, which is true.” The question, Odjo asks, is how to do it. “How can we succeed in making a solution available to farmers? And once that has happened, how do we convince them to use it? Those are big questions which people were asking 50 years ago but they’re still being discussed today.”

Odjo demonstrates the use of a handheld grain moisture tester in Comitán de Dominguez, Chiapas, Mexico. (Photo: Juan Carlos Reynoso)

Finding answers to the big questions

“The potential solutions sound so simple, but when you actually try to implement these things it can be very complex.”

Odjo can reel off a list of postharvest interventions which seem straightforward initially but fail at the moment of implementation. Farmers might be instructed to harvest their grain at a particular time, which turns out to conflict with the timing of an important traditional ceremony, which cannot be rescheduled. Elsewhere they may be encouraged to avoid reducing moisture levels by purchasing a dryer but lack the resources to do so.

Much of Odjo’s work involves conducting research into the process of technology transfer and the scaling of postharvest technologies, working with a number of projects in Mexico to find the most efficient ways of training farmers and providing them with the tools they need to use improved practices and technologies.

“What we’re looking for is the right technology for each farmer,” he explains. “Because the conditions in the highlands of Guanajuato are not the same as in coastal Yucatán, or any of the other locations we work in.” Hermetic technology has been proven to be effective in most conditions, but the choice to use hermetic silos, hermetic bags, or a cocoon storage container ultimately depends on farmer preferences and the specific conditions in their local area. “We noticed, for example, that in the highlands pests tend to pose less of a threat to stored grain, so we need to use a different strategy than we would at sea level, where humidity can significantly increase the risk of grain becoming contaminated.”

Odjo and his team have also noted that in Mexico, although many postharvest activities such as shelling are led by women, men are more likely to attend farmer trainings, which makes it harder to ensure that they are reaching their target demographic. “Gender has emerged as a key parameter that we need to take into account, so we’re working with an excellent gender specialist at CIMMYT to find ways of making sure we transfer knowledge and technologies efficiently.”

While it can be challenging coordinating with so many different stakeholders, each with their distinct priorities and interests, Odjo is adamant that postharvest research can only be successful when it is fully interdisciplinary and collaborative. Though farmers are their core audience, he and his team make sure they work with extension agents, government actors, researchers and development practitioners to find solutions. “I can’t do anything alone so I’m open to collaboration,” he adds. “We always need fresh ideas.”

“A lot of people think postharvest just means storage, but it actually encompasses everything from the moment of harvest and includes processes like drying, shelling, technical and economic activities,” Odjo explains. (Photo: Francisco Alarcón/CIMMYT)

Sharing knowledge in 140 characters

Up until quite recently, Odjo was reluctant to join Twitter because he felt that he had nothing to share. It was only when colleagues encouraged him to use social media as a platform for discussing postharvest issues that he discovered the app is an effective way of sharing recommendations directly with farmers and agricultural service providers. “One of my lecturers used to say that you can understand something if you’re capable of explaining it to a kindergarten-aged child. If you don’t succeed, it means you haven’t understood.”

“That’s become a part of my job that I really enjoy: figuring out how to share research and results of investigations with different audiences in a simple manner.”

His newfound social media presence has also proved useful for connecting with researchers on a global level. In late 2019, researchers in Laos interested in learning about postharvest technologies reached out to Odjo, who was able to arrange for colleagues to travel to the country and share practices developed with local extension agents and blacksmiths in Mexico. “And do you know how they found me? Through my Twitter account.”

Moving forward, Odjo hopes to extend the scope of his activities beyond Latin America and carry out more knowledge exchange with his peers across the world. “In research, a lot of people are working on the same topics, but we don’t always share the information. I’m open to sharing my experience, because I’m sure I can learn a lot from others that will be useful for my job.”

Kenya in particular stands out as a case study he can learn from, where a high incidence of aflatoxins in maize, heavy government intervention and fierce market competition among providers of hermetic bags have allowed for the successful scaling of postharvest technologies. “It would be great to be able to analyze their scaling process and learn from it. Not to replicate it entirely, because obviously the conditions aren’t the same, but there will undoubtedly be lessons we can take and apply here in Mexico and Latin America.”

Preventing post-harvest losses key to food security

Written by Mary Donovan on November 26, 2019. Posted in In the media.

According to the International Maize and Wheat Improvement Center, one of the key constraints to improving food and nutritional security in Africa is the poor post-harvest management that leads to between 14 percent and 36 percent loss of maize grain, thereby aggravating hunger.

New postharvest storage technologies for Latin America

Written by on March 23, 2013. Posted in News.

7178682264_898e3326d3 The 2nd Latin American Convention on Airtight Storage sponsored by the global company GrainPro, Inc was held during 1-2 March 2013 in Antigua, Guatemala. More than 50 participants from Brazil, Ecuador, Colombia, Costa Rica, Honduras, El Salvador, Guatemala, Mexico, and the USA, and other countries attended the event.

Presented at the event were the latest airtight storage technologies used to ship, preserve, and maintain the quality of raw materials and food grains produced in the region. For example, Caribecafé SKN/ NKG (Colombia) explained how they apply new technology to high quality coffee, and Zamorano University (Honduras) described its uses in bean, maize, and sorghum. Luis Gerardo Ramírez (CIMMYT-México) described the MasAgro program which is currently evaluating GrainPro technology in the Mexican state of Chiapas. “We are ready to extend the technology to small farmers in other regions of Mexico through the MasAgro hubs,” added Ramírez.

Other technologies presented were plastic bags known as SuperGrainbagsTM-IVR, which were evaluated by CIMMYT and the Technological Institute of Monterrey under the supervision of Silverio García. Results indicated that the bags are appropriate for storing and protecting maize and other basic grains from postharvest pests. Furthermore, since they do not require insecticide use, they are environmentally friendly, as well as 100% recyclable. “If we can’t avoid postharvest losses, we can’t achieve food security,” said García. “By applying these technologies, we are opening a new chapter in the weakest link of the maize production chain in Latin America.”

In his speech, Jordan Dey, vice-president of Food Security, pointed out that according to UN estimates, global postharvest losses account for 25% of all grain production, an amount that would be enough to feed the world’s most vulnerable people.

Convention participants thanked CIMMYT’s Institutional Relations for Latin America, headed by Isabel Peña, for providing teaching materials and for its support during this new stage aimed at disseminating new postharvest technologies throughout the region.