Farmers’ indigenous knowledge of crop pests and their damage in western Kenya

Chitere, Preston; Omolo, B

doi:10.1080/09670879309371776

Cited by 42 publications

(25 citation statements)

References 2 publications

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“…Farmers' KPP in controlling rice pests has been well-documented (Fujisaka, 1990;Adesina et al, 1994;Heong and Escalada, 1997b). Similar documentation is available for cotton (Ochou et al, 1998), cashew (Nathaniels, 1998), vegetables (Pollard, 1991;Trutmann et al, 1993Trutmann et al, , 1996Burleigh et al, 1998), and subsistence crops (van Huis et al, 1982;Atteh, 1984;Chitere and Omolo, 1993;Bottenberg, 1995;Youm and Baidu-Forson, 1995), but it is non-existent for tropical fruit crops. Besides, relatively few scientific papers address farmers' pesticide use patterns, which in many cases in developing countries is a major component of pest management (Heong and Escalada, 1997b;Burleigh et al, 1998).…”

Section: Introductionmentioning

confidence: 85%

Farmers' knowledge, perceptions and practices in mango pest management in the Mekong Delta, Vietnam

Mele

Cúc

Huis

2001

International Journal of Pest Management

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A survey of mango farmers' knowledge, perceptions and practices in pest management was conducted during the dry season of 1998 in the Mekong Delta, Vietnam. Identification and control of pests was often based on damage symptoms, rather than on recording of causal agents. Damage caused by the seed-borer Deanolis albizonalis (Hampson) was often wrongly attributed to the fruit flies Bactrocera dorsalis Hendel. Nearly all farmers applied calendar sprays of insecticides (97%) and fungicides (79%) from pre-flowering until harvest, with on average 13.4 and 11.6 applications per year, respectively. Pyrethroids were most popular (57%), followed by organophosphates (25%) and carbamates (15%). Around 20% of the insecticides used belonged to WHO Toxicity Class I, while the rest nearly all belonged to Class II. Half of all the target sprays were done with three pyrethroid products only. Farmers' estimated yield loss due to insect pests was strongly correlated to estimated pest severity. Due to pesticide sellers' recommendations, farmer's sprayload significantly increased from 26 to 37 sprays per year, whereas the number of insecticide products used per farmer increased from 2.6 to 3.9 with advice from extension staff and media. Expenditure for pesticides was correlated with that of fertilizers. There was no relationship between the amount of pesticides sprayed and yield. On-farm research is needed to evaluate whether significant savings can be obtained given a more judicious use of pesticides. Only 10% of the 93 participating farmers knew about natural enemies, all of which were predators.

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Section: Introductionmentioning

confidence: 85%

Farmers' knowledge, perceptions and practices in mango pest management in the Mekong Delta, Vietnam

Mele

Cúc

Huis

2001

International Journal of Pest Management

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“…Farmers' knowledge of diseases are well documented for cash crops, such as cotton (Ochou et al, 1998), rice (Norton and Rajotte, 1999;Price, 2001;Rubia et al, 1996) and food crops such as millet (Tanzubil and Yakubu, 1997;Youm and Owusu, 1998), beans (Trutmann et al, 1996), cowpea (Bottenberg, 1995), and vegetables (Chitere and Omolo, 1993;Norton and Rajotte, 1999;Obopile et al, 2008). However, similar documentation for sweet potatoes is scant and not up-to-date (Bashaasha et al, 1995;Gibson et al, 2000;Kapinga et al, 1995).…”

Section: Introductionmentioning

confidence: 91%

“…Virus diseases alone can lead to sweet potato yield reductions in the range between 56% and 98% (Mukasa et al, 2003). Thus understanding farmers' knowledge related to perceptions of crop diseases, practices of pests, and their management is essential for the development of management strategies, supported by government and non-governmental organizations, which cater to farmers' needs and have a high probability of being adopted by the intended users (Chitere and Omolo, 1993;Rubia et al, 1996;Tanzubil and Yakubu, 1997). Oswald et al (2009) assert that in Africa, weevils and viruses are crucial biological factors that hinder both sweet potato quality and yield.…”

Section: Introductionmentioning

confidence: 98%

Farmers' knowledge, perceptions and management of diseases affecting sweet potatoes in the Lake Victoria Zone region, Tanzania

2015

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“…Knowledge of farmers is necessary for the development of appropriate pest control management strategies in line with farmers' needs hence a high likelihood of adoption (Chitere and Omolo 1993;Rubia et al 1996;Tanzubil and Yakubu 1997).…”

Section: Introductionmentioning

confidence: 99%

Participatory plant breeding approach for host plant resistance to bean fly in common bean under semi-arid Kenya conditions

et al. 2009

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Common bean (Phaseolus vulgaris L.) is the most important legume crop in Kenya. It is cultivated across a wide range of agro-ecologies which include high potential and marginal areas. Eastern Kenya alone, largely semi-arid, accounts for 35% of the country's total bean production. Bean farmers mainly small-scale have limited access to quality seed, chemical pesticides and fertilizer. Therefore, bean yield under on-farm conditions still remains below 500 kg ha -1 while the potential is about 1,200 kg ha -1 under semi-arid conditions. To asses the farmers' views on bean varieties and a key insect pest and associated constraints contributing to yield loss, research was undertaken. The research included survey to quantify the yield loss and Participatory Rural Appraisal to determine the level of adoption and criteria for variety choice in semi-arid eastern Kenya (SAEK). The results show that farmers consider drought and insect pest problems as main causes for low yields. The adoption rate for improved varieties is high but self sufficiency in beans stands at 23% in the dry transitional (DT) agro-ecology and at 18% in the dry mid-altitude (DM) agro-ecology, respectively. This could be attributed to low adaptability since most of the improved varieties grown were selected for high potential areas but now found in marginal areas. Drought, earliness, yield stability, and insect pest resistance are the main reasons for choice of varieties by farmers. Bean fly (Ophiomyia sp.) was identified as one of the key crop pests of beans limiting yield. Besides, African bollworm (Helicoverpa armigera) and bean aphid (Aphis fabae) were ranked higher. Due to limitations of the conventional breeding approach, a participatory plant breeding approach is suggested so as to provide an opportunity to develop insect pest resistant varieties adapted to the SAEK region.

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Farmers’ indigenous knowledge of crop pests and their damage in western Kenya

Cited by 42 publications

References 2 publications

Farmers' knowledge, perceptions and practices in mango pest management in the Mekong Delta, Vietnam

Farmers' knowledge, perceptions and practices in mango pest management in the Mekong Delta, Vietnam

Farmers' knowledge, perceptions and management of diseases affecting sweet potatoes in the Lake Victoria Zone region, Tanzania

Participatory plant breeding approach for host plant resistance to bean fly in common bean under semi-arid Kenya conditions

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