Coping strategies adopted by small-scale farmers in Tanzania and Kenya to counteract problems caused by storage pests, particularly the Larger Grain Borer (original) (raw)
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Managing storage pests of maize: Farmers' knowledge, perceptions and practices in western Kenya
Crop Protection, 2016
Insect pests are a key constraint to effective utilization of cereal crops in sub-Saharan Africa (SSA), with damage caused by these pests in the stores of particular concern. Although a number of approaches have been advanced for control of storage pests of maize, uptake remains a challenge, with effectiveness of some approaches being questionable. We conducted a survey in western Kenya among 330 respondents using face to face interviews and focus group discussions to evaluate farmers' practices, knowledge and perceptions of storage pests of maize, and their current practices in managing such pests as a basis for development of efficient integrated pest management (IPM) approaches for the pests. Majority of the respondents stored maize in traditional granaries, with less than 10% of them using modern improved facilities, mainly due to inability to afford these. Majority of the respondents also cited attack of their stored grains by a number of insect pests, causing about 40% grain losses. The larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae), sawtoothed grain beetle, Oryzaephilus surinamensis (L) (Coleoptera: Silvanidae), and maize weevil, Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae), were perceived as the most common and damaging pests. Farmers' perceptions of pests were positively and significantly influenced by level of education and farming experience, indicating that education and experience build farmers' understanding of storage pests. Storing maize in unshelled form seemed to result in less pest attack, although majority of the respondents stored their maize in shelled form. Moreover, local maize varieties were perceived to be resistant to pests. The farmers applied various control methods, with sun-drying being the most popular practice. Usage of pesticides was minimal, mainly due to high costs, lack of information, and unavailability of appropriate and effective products. There were also other cultural methods applied, such as use of smoke and insecticidal plants. The respondents decried lack of training and extension services on storage pests and their management, underscoring the need to develop extension services. The underlying mechanisms of the perceived pest resistance in local varieties of maize and cultural pest management methods need to be established for exploitation in development of effective IPM approaches. There is also need to address the challenges hindering uptake of modern storage and control approaches.
A review of investigations to improve pest managemet of stored maize in smallholder farms in Kenya
Integrated Pest Management Reviews, 1996
A 4-year project in Kenya to develop management strategies for the larger grain borer (Prostephanus truncatus) in smallholder maize stores is described. The entomological investigations included behavioural and ecological studies of pest activity in experimental and farmers' maize stores and the natural environment, the use of insecticides to protect maize stored as grain and cobs and the release of a biological control agent. The latter was a predatory beetle; this marks the first release of a biological control agent against a storage pest in East Africa. The operation of a national trapping network to assess the extent and future spread of the pest and predator and target control campaigns is outlined. Recommendations for the control of the stored product pests, resulting from these investigations, were tested for likely adoption and modification in the light of socioeconomic surveys and a cost-benefit analysis. A decision tree approach to managing stored product pests is suggested which allows extension workers and farmers to decide the necessity of pesticide application when assessing how best to protect stored maize.
International Journal of Pest Management, 2010
Storage losses due to pests threaten livelihoods of farmers across Africa. Synthetic pesticides provide effective control when used correctly but resource-poor farmers cannot afford them. A survey of farmer ethno-ecological knowledge of pests of stored maize and bean, and their pest management practices including pesticidal plant use, was conducted in eastern Zambia and northern Malawi. Almost all respondents reported serious pest damage, with bruchids (Callosobruchus maculatus) and grain weevils (Sitophilus spp.) being major pests in beans and maize, respectively. The larger grain borer (Prostephanus truncatus) was reported more widely in Malawi. In Zambia, 50% of farmers used synthetic pesticides during storage, while nearly all did so in Malawi. Despite differences in storage methods between Malawi and Zambia, farmers in both countries were familiar with pesticidal plants, where Tephrosia vogelii was the most frequently reported. Surprisingly few farmers actually used pesticidal plants, highlighting a promotion opportunity. Our results provide a foundation for optimizing the use of pesticidal plants and enhancing their value to resource-poor farmers, across Africa.
2017
Working Document Series 4 This IPM series record assesses farmer's knowledge, attitudes and current pest management practices in Nakuru and Bomet counties in Kenya. The intent is to identify major pests and diseases affecting Maize production, to test and promote the appropriate technology that combat challenges in maize production and productivity in the areas. The series also ensures that recorded data and other information gathered, generated and analyzed are part of the research work of International Centre of Insect Physiology and Ecology (http://www.icipe.org). The series is reviewed internally by icipe staff. It can be freely accessible both in hard copy and electronically and cited due acknowledgement. About ICIPE icipe's mission is to help alleviate poverty, ensure food security and improve the overall health status of peoples of the tropics, by developing and extending management tools and strategies for harmful and useful arthropods, while preserving the natural resource base through research and capacity building. The Centre's vision is to pioneer global science in entomology, to improve the wellbeing and resilience of people and the environment to the challenges of a changing world, through innovative and applied research, alongside deep exploratory study, impact assessment, evaluation and sustainable capacity building.
Farmers' Perceptions of Rice Production Constraints and Stem Borers Management Practices in Tanzania
Rice farmers in Tanzania continue to experience losses due to stem borers. However, the information on farmers' knowledge and perceptions of rice stem borers is limited and farmers' efforts on managing this insect have been ineffective. The aim of this study was to investigate constraints affecting rice production and farmers' approaches of stem borer management in irrigated low land rice ecosystems in Tanzania. Research method: A focus group discussion with farmers using a semi-structured questionnaire was used for data collection. The information collected included: farmers' socioeconomic profiles, farm characteristics, knowledge and perceptions of stem borers and their management practices.Farmers reported insect pests such as stem borers, white flies, leaf rollers and grasshoppers as major constraints of rice production. Other constraints reported were such as diseases, damage by birds, drought, weeds and lack of access to credit for purchasing inputs. Most of the farmers apply chemical insecticides against rice insect pests particularly stem-borers where number of health hazards have been reported. Very few farmers use cultural methods including crop residue disposal and split application of nitrogenous fertilizers for reduction of stem borer damages. The study revealed that, most farmers have limited knowledge on the recommended stem borer management practices and suggests that environmentally friendly pest management methods to be designed and implemented to minimize losses associated with rice stem borers.
Crop Protection, 2016
Grain legumes play an important role in community livelihood and in the national economy in Kenya. Unfortunately, in many African countries, production doesn't satisfy the demand in grains due to various constrains. Understanding farmers practices and behavior in the management of grain legume pests is a crucial step in the development of sustainable management strategies. A total of 216 farmers were surveyed in eight districts of eastern Kenya to evaluate farmers' knowledge and perceptions of grain legume pests; to examine current pest management practices, and to identify other production constraints. Grain legumes are grown by a wide age-group of farmers, with both genders equally represented. Chemical control remains the main pest management strategy, and, to ensure pesticide effectiveness, farmers also use increased application rates, chemical alternation, frequent application and mixtures of chemicals. While farmers used other control measures, they showed only limited interest in biological control. The majority of the farmers had experience in grain legume farming and were able to identify the major pests, which were the legume flower thrips Megalurothrips sjostedti Trybom, the cowpea aphid Aphis craccivora Koch and the legume pod borer Maruca vitrata Fabricius. Our survey revealed that education and proximity to extension services contributed significantly to farmers' knowledge of grain legume pests, suggesting the need to provide continuous training and capacity building on integrated pest management in grain legume farming. The study also suggests integration of other pest management strategies such as the use of early maturing varieties, biopesticides and biofertilizer to reduce the use of chemical for sustainable pest management.
Effect of Integrated Pest Management Technology on the Livelihoods of Small-Scale Maize Producers
Review of Agricultural and Applied Economics, 2021
Research background: In Kenya, maize production has been severely constrained by parasitic pests and weeds such as Striga, stem borer, and fall armyworm. The government of Kenya and its partners have developed, disseminated, and promoted the continual uptake of integrated pest management technologies such as Push-Pull technology (PPT) as a way of addressing these constraints. Understanding the effect of these technologies on smallholder livelihoods is crucial, however, it is largely ignored in the literature. Purpose of the article: This study evaluates the effect of continual uptake of PPT as an integrated pest management technology on livelihood outcomes of small-scale maize producers in Homa Bay County. Methods: A multi-stage sampling procedure was used to select a sample of 240 respondents. Cross-sectional data were gathered through face-to-face interviews using a pretested semi-structured questionnaire, and analysed using descriptive statistics and propensity score matching models. Findings & Value added: Findings were that age, education level, total land owned, perception on Striga weed, stem borer, and fall armyworm severity, and land tenure positively influenced continual uptake of PPT, whereas the distance to nearest administrative centre was negatively associated with it. Propensity score matching results revealed that continual uptake of PPT had a positive and significant effect on household consumption expenditure and household dietary diversity, with a negative impact on poverty. The study, therefore, recommended policies that will ensure efficiency, literacy development, extension training, and resource availability among PPT non-adopters and dis-adopters to the level of the PPT continuous users.
Hindawi, 2021
This survey study was conducted in two districts of the Jimma zone from April to July 2020 in the community of farmers who store maize and sorghum. While in Ethiopia, like in other east African countries, Maize and sorghum were an important postharvest chain for food security and income sources for small-scale rural farmers. Yet, there is a high postharvest loss of grains due to poor storage handling, storage practice, and pest infestations. And therefore, this survey study was aimed at assessing grain storage duration and level of pest infestations in selected districts of Jimma zone, Ethiopia. Two districts, Tiro Afeta and Sokoru, were selected based on the production potential of maize and sorghum grain crops. Then, three Kebeles were randomly taken from each district. Finally, two of the district's 6 Kebeles with a total of 333 households storing maize and sorghum were interviewed, while limited farmers in Tiro Afeta and Sokoru districts store sorghum 4.9% and 60.7%, respectively, for more than one year, and the current finding indicates that as long storage time, there is a prospect to be mold infestation.
African journal of agricultural research
Diseases and pests are among the major constraints limiting maize productivity in the smallholder (SH) farming sector of sub-Saharan Africa. The objectives of this study were therefore, to determine how SH farmers perceive and cope with diseases and pests, identify with farmersother constraints to maize production. Data were collected from three villages of KwaZulu-Natal (KZN) province in South Africa using surveys and participatory rural appraisal (PRA) methodology. Local maize varieties were further evaluated for disease resistance and grain yield potential at two locations in KZN. Cob rots, grey leaf spot (GLS), maize streak virus (MSV), northern leaf blight (NLB), phaeosphaeria leaf spot (PLS) and common rust were the main diseases identified by farmers, but their incidence was low and occurrence infrequent. More than 75% of the farmers did not control both insect pests and diseases, while the rest used chemicals or everyday household remedies for control. Stalk borers and cutworms were the most prevalent insect pests, where as drought, excessive rains, hail storms, and soil fertility were the most important abiotic constraints identified. Field trial results of local varieties indicated high yield potential and genetic variability for disease resistance to PLS, GLS, and NLB. These findings suggest that; if the main production constraints are addressed, farmers could realize high yields from their local varieties. Breeding opportunities, therefore, exist for incorporating resistance or tolerance to these stresses into the local varieties.