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Now showing items 11-20 of 180
The effects of crop cover and residue management on runoff and soil loss
(1988)
The amount ofplant cover needed to protect a soil depends on the soil characteristics and the intensity of erosive forces at that time and place. Loose soil on steep slopes needs permanent vegetation to intercept raindrops ...
Evaluation of some chemicals for efficacy against the red spider mites, Tetranychus sp. (Acarina: Tetranychidae) attacking cotton in Eastern Kenya
(University of Nairobi, 1985-02)
An evaluation of 17 chemicals was conducted in the field at Mwea-Tebere Agricultural Research Station to ascertain their efficacy against the red spider mites Tetranychus sp. attacking cotton in Eastern Kenya. The study ...
Effects of infestation and transmission of the common bean mosaic virus (CBMV) by the black bean aphid A. fabae on the common bean P. vulgaris.
(University of Nairobi, 1982)
Damage caused to vegetative growth and yield of bean (Phaseolus vulgaris) by Aphis fabae combined with bean common mosaic virus was generally significant when aphid infestation occurred during the early and late vegetative ...
Studies of the biology and behaviour of Phlebotomus martini (Diptera:Phlebotomidae) from Kibauni, in Machakos District, Kenya
(University of Nairobi, 1981-12)
Phlebotomus martini, a sandfly belonging to the Synphlebotomus group, is the main vector of the fatal disease kala-azar in Kenya. The breeding sites of this species have so far remained a mystery, and immature stages have ...
Influence of different cropping systems on incidence and severity of bacterial pustule of cowpea (Vigna unguiculata (L) Walp) caused by Xanthomonas campestris p.v. vignicola (Burkholder) dye
(University of Nairobi, 1989)
A study was undertaken to determine the influence of growing cowpea under three different cultivation practices on bacterial pustule development in the field. The disease spread within and between plants was shown to be ...
Epidemiological, investigations of visceral leishmaniasis in the West Pokot District, Kenya
(University of Nairobi, 1984-12)
Studies of the epidemiology of visceral leishmaniasis in the West Pokot focus have revealed that Sergentomyia bedfordi, S. antennatus and S. schwetzi are the most abundant sandfly species. The latter have been shown to ...
Search in the available cowpea germplasm for sources of resistance to the common pod-sucking bugs Riptortus dentipes (F.) and Anoplocnemis curvipes (F.).
(University of Nairobi, 1985)
In trials at Ibadan, Nigeria, and Kikambala, Kenya, none of the 4180 Vigna unguiculata cultivars screened were highly resistant in the field, although 33 were moderately resistant to both pests, sustaining 20-39% pod damage. ...
The effects of the infestation by red spider mites, Tetranychus sp. (Acarina: Tetranychidae) on the growth and yield components of cotton in Eastern Kenya
(University of Nairobi, 1985-02)
Field investigations were conducted at Mwea-Tebere Agricultural Research Station, situated in Central Province of Kenya, to evaluate the effects of the infestation of cotton by red spider mites, Tetranychus sp., on its ...
Investigation of animal reservoirs of visceral leishmaniasis and the isolation of Leishmania major in Marigat, Baringo District, Kenya
(University of Nairobi, 1983-09)
Animals were trapped in Marigat, Baringo District to investigate animal reservoirs of visceral leishmaniasis in an endemic focus of the disease. Several species of rodents, carnivores and reptiles were captured. Specimens ...
Studies of the toxicity of Gnidia latifolia Meisn in cattle
(University of Nairobi, 1983)
Twelve calves were drenched with ground leaves of Gnidia latifolia (Thymelaeaceae) and their responses studied. Signs of clinical intoxication were observed in all the treated animals and the intensity of the signs depended ...