Evidence Of Antibiosis Resistance To The Spotted Stemborer, Chilo Partellus (Swinhoe) In A Maize (Zea Mays L.) Population

S2 line and S2 test-cross recurrent selection procedures were initiated to improve the resistance of a maize (Zea mays L.) population to the spotted stemborer, Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae). Thirty-five selections developed from the population were evaluated for resistance to the stemborer in western Kenya. Resistance was rated according to leaf feeding (LF), stem tunnelling (ST) and deadheart formation (DH) following artificial infestation with first-instar C. partellus. Larval establishment and growth were also assessed.

The Impact of sugarcane farming on household food security in Belgut Division

Agricultural sector plays an important role in the economy of Kenya. This sector has been developed with the aims of attaining economic growth, assuring equity in such growth and stability of farm incomes as well as a wider participation by small scale farmers and large scale farmers in cash crop production and meeting the country' s domestic food requirements. The most important cash crops in the study area are coffee, tea, sugarcane and occasionally maize.

An economic analysis of factors affecting the adoption of Napier Grass in smallholder dairying in Kiambu District, Kenya

This study focused on the smallholder dairy farmers in Kiambu district. The aim of the study was to assess the factors that influence farmers‟ decision to adopt Napier grass and to quantitatively evaluate the impact of these factors on the adoption of planted fodder. It also aimed at recommending policy interventions that may be used to enhance the adoption of planted fodders for improved dairy production in Kenya. Data were collected in two phases through questionnaire interviews with Kiambu farmers in 1996 and 1997 and subjected to descriptive and quantitative analyses.

Impact of land use changes on nematode diversity and abundance

This study was conducted to determine the effect of land use on nematode community structure. The land use types represented in the study sites were natural forest, plantation forest, tea, coffee, napier grass, agroforestry, fallow and annual crops dominated by maize and beans. Nematode diversity and abundance decreased with intensity of land cultivation or human interference, with the natural forest being regarded as the benchmark.

Effect of seasonality of feed resources on dairy cattle production in coastal lowlands of Kenya

In the Coastal Lowlands of Kenya, small-scale integrated crop-livestock system is the dominant form of agricultural production. Feed quantity and quality are inadequate and rarely meets the nutrient demands of lactating cows especially, in the dry seasons. The objective of this study was to determine the effect of seasonality on availability and quality of feed resources on dairy cattle productivity in Coastal Lowlands of Kenya.

Characterization of Fusarium culmorum isolates by mycotoxin production and aggressiveness to winter wheat

Twenty seven isolates of Fusarium culmorum were investigated for their aggressiveness on ears and leaves of wheat as well as for mycotoxin production by inoculating winter wheat (cv. Contra) in field trials conducted at Hennef, Germany, in 1996 . Additionally, in vitro mycotoxin production was determined on autoclaved cracked corn [maize]. Head blight and the negative effect of F. culmorum on 1000-grain weight greatly varied among isolates (30-90% of ears bleached; 14-61% reduction of 1000-grain weight).

Assessment of the role of agro-input dealers in dissemination and communication of integrated soil fertility management: The case of Siaya and Trans Nzoia counties

Lack of access to necessary agro-inputs contributes to low agricultural productivity and slows the overall economic growth and development in most parts of sub Saharan Africa (SSA). Agro-input dealers make inputs more easily accessible to rural-based smallholder farmers. Despite their importance, little is known about the strategies agro-input dealers use in the dissemination and communication of information and knowledge on agricultural technologies.

Evaluation of cropping systems as a strategy for managing snap bean flower thrips in Kenya

Four cropping systems were compared in terms of their effectiveness to suppress flower thrips, Frankliniella occidentalis Pergande and Megalurothrips sjostedti Trybom infestation on Snap beans (Phaseolus vulgaris L). Maize (Zea mays L) was used either as a margin crop or an intercrop. In addition, a set of monocrop snap beans were treated with insecticide, Thiacloprid, and another set left untreated.

Effects of Canavalia ensiformis and Mucuna pruriens intercrops on Pratylenchus zeae damage and yield of maize in subsistence agriculture

Host status of four leguminous cover crops [Canavalia ensiformis (L.) DC. (Jack bean), Crotalaria ochroleuca G. Don (Sunnhemp), Lablab purpureus L. (Hyacinth bean) and Mucuna pruriens (L.) DC. (velvet bean)] to Pratylenchus zeae Filipjev and effects of intercropping C. ensiformis and M. pruriens with Pan5195, H627 and Emap11 maize cultivars on P. zeae population and disease severity on maize were determined in greenhouse and field tests. Pratylenchus zeae significantly (P<0.05) reduced growth of C. ochroleuca by 36% but had no effect on C. ensiformis, M. pruriens and L. purpureus.

Infectious structures and response of maize plants to invasion by Exserohilum turcicum (Pass). in compatible and incompatible host pathogen systems.

Objective: To study the differential response of corn leaves to invasion by Exserohilum turcicum comparing compatible and incompatible host-pathogen systems. Methodology and results: Maize leaves excised from 14 day-old plants were inoculated with 13 different E. turcicum isolates following the detached leaf bioassay technique. The infection process was studied by fluorescent microscopy after clearing leaves using a mixture of ethanol:chloroform, 75:25 (v/v) containing 0.15% trichloroacetic acid, and subsequent staining with calcofluor.


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