The supply responsiveness of wheat farmers in Kenya

The major objective of the study was to show how wheat farmers respond to price incentives in Trans-Nzoia,Uasin Gishu, Nakuru, Narok and Nyandarua districts in Kenya. The Prices included in the analysis are the annual and one-year lagged prices of wheat and other competing enterprises in each district. Wheat yield variable and average rainfall distribution for each district are incorporated. Time series data from

Farmers' cultural practices and management of potato late blight in Kenya Highlands: implications for development of integrated disease management

A survey of 277 farmers in three major potato-growing areas in Kenya was conducted in 2000 and 2001 with the aims of assessing farmers' current perception and knowledge of late blight and practices for its management and identifying points of potential intervention in the development of integrated disease management (IDM) programmes. The problem of late blight was one of several constraints that growers faced such as lack of quality seed, markets, storage and prevalence of bacterial wilt. Most farmers (54%) regarded late blight as a serious biotic constraint upon production.

Efficacy of fungicide combinations, phosphoric acid and plant extract from stinging nettle on potato late blight management and tuber yield

Late blight caused by Phytophthora infestans is a major constraint to potato production. Inadequate control of the disease has often resulted in potato yield losses. We assessed the efficacy of fungicides, phosphoric acid and stinging nettle extract combinations for late blight control at two locations in Kenya. Disease severity, relative area under disease progress curves (RAUDPC), pathogen lesions and tuber yield were quantified during the 2008 and 2009 cropping cycles. The application of metalaxyl alternated with phosphate resulted in the greatest suppressive effects on late blight.

Southern leaf blight of maize (zea mays l.) in Kenya.

The southern leaf blight of maize caused by
Helminthosporium maydis is a serious disease that
has recently been introduced into Kenya. The
disease is causing concern in many maize growing
areas of the world. Investigations were carried out
on this disease and these included studies of disease
incidence, severity, symptoms, characteristics of
the pathogen, factors affecting colony growch 2nd
conidial germination, screening 7 maize hybrids
aud zco POSl te for resistance and host ranqe . Where

Genetic Nature of Resistance in Corn to Yellow Leaf Blight

Different corn (Zea mays L.) inbreds and hybrids with normal cytoplasm (N) and similar inbreds with Texas (Terns) and other male sterile cytoplasms were compared for their reaction to Phyllosticta yellow leaf blight. Considerable resistance was found in some of the corn inbreds and hybrids tested. The resistance was found to be influenced by both cytoplasmic and nuclear factors. Plants with Tcms cytoplasm were the most susceptible, while C, J, and R types of cytoplasm seemed highly resistant.

Resistance and inheritance of common bacterial blight in yellow bean

Common bean (Phaseolus vulgaris L.) is the most important food legume among the pulses. It is a cheap source of protein, especially in Sub-Saharan Africa. However, bean production is constrained by bacterial diseases, of which common bacterial blight (Xanthomonas axonopodis p.v. phaseoli) is prevalent in Africa. The objective of

Transferring striga resistance Qtl from a resistant donor source into in Rwandan adapted sorghum variety

Sorghum [Sorghum bicolor (L.) Moench] is one of the most important cereal crops
globally after wheat, maize, rice, and barley and has an important role in the food and
fodder security for millions of rural families in arid and semi-arid regions of the world.
Despite its important role, sorghum is affected by numerous pests, weeds and diseases
such Striga sp, stalk and root rot diseases, leaf blights, downy mildews, virus diseases,
smuts, rust, greenbugs, sorghum midge, stem and stalk borers, shoot fly, and others.

Health Status Of Potato Seed And Host Resistance Against Late Blight Disease Under Greenhouse And Field Conditions In Kenya

Importation of potato seed into Kenya has become common in light of the persistent shortage of clean seed potato in the country. The performance of imported potato varieties under Kenyan conditions and disease reaction especially to late blight caused by Phytophthora infestans is unknown. To fill this knowledge gap, a study was conducted on potato health status of local and imported germplasm, levels of resistance to late blight and yields under Kenyan conditions.

Screening for Resistance to Bacterial Blight in Upland Cotton (Gossypium hirsatum L.)

Fifty four varieties of upland cotton (Gossypium hirsutum L.) were screened for resistance to bacterial blight caused by Xanthomonas malvacearum E. F. Smith, (Dowson) under natural field conditions and artificial Inoculation. In general, moderately high levels of field infection provided useful information on susceptibility of varieties but 11 needed to be1 supplemented with artificial inoculation to confirm resistance. Hypocotyl regions of one week-old seedlings were subjected to artificial inoculation with bacterial blight crude isolate using hypodermic needles.

Evaluation of Antibiotic Metabolites from Actinomycete Isolates for the Control of Late Blight of Tomatoes under Greenhouse Conditions

Antibiotic metabolites from two antagonistic actinomycete isolates coded 28P and CS35 were evaluated for the control of late blight of tomatoes in the greenhouse. Five concentrations namely; half strength, quarter strength, normal strength, one and half strength and double strength were evaluated for their efficacy in controlling late blight disease. The various concentrations of the metabolites were found to give a significant (p=0.05) control in management of late blight.