Browsing RP-Department of Plant and Microbial Sciences by Issue Date
Now showing items 1-20 of 297
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Pea Aphid: Interaction of Insecticides and Alfalfa Varieties
(Entomological Society of America, 1978-02)Carbofuran, methoxychlor, Mobile MCA-600 (benzo [b]thien-4-yl methylcarbamate), leptophos, methidathion, and dialifor were evaluated for control of Acyrthosiphon pisum (Harris) on the alfalfa varieties `Cody', `Dawson',` ... -
Control of the potato tuber moth (Phthorimaea operculella) (zell) in storage using dust formulated insecticides.
(Ministry of Agriculture, 1980-01)Tubers of potato variety Roslin Gucha were dusted with the followign insecticides:- Pirimiphosmethyl (1 percent, permethrin (1 percent) cypermethrin (0.5 percent), Fenvalarate (1 percent) and etrimfos. The adult moths were ... -
The induction of a light requirement in bidens pilosa seeds by leaf canopy shade
(Wiley, 1980-01)The aim of these experiments was to determine whether exposure to leaf-canopy shade induces a light requirement for germination in Bidens pilosa seeds. Seeds of this species were pretreated by placing them in the shade ... -
The inhibition of germination of bidens pilosa seeds by leaf canopy shade in some natural vegetation types
(Wiley, 1980-01)The inhibition of germination by leaf canopies was investigated in Bidens pilosa, a widespread tropical colonizing weed species. Seeds of this species were sown in the shade of four natural vegetation types: early colonizing ... -
Germination tests on thirty-two East African weed species
(Wiley, 1980-06)The seeds of thirty-two species of common East African weeds were set to germinate in the light and in the dark. Eighteen species with more than 40% germination in the light were also germinated in leaf shade and in neutural ... -
Factors that influence yield in close-spaced coffee, 1: Light, dry matter production and plant water status.
(Kenya Coffee (Kenia). Oct 1984. v. 49(580) p. 203-211., 1984-10)Photosynthetically active radiation (PAR) flux, dry matter production and partitioning and leaf water potential were compared in five tree densities with and without irrigation using the coffee cultivar SL28. The effect ... -
Factors that influence yield in close-spaced coffee. 2. Yield components
(1985)Yield components (number of nodes, fruits per node, and fruits per primary branch) were compared in five densities with and without irrigation; using / Coffea arabica / var. SL-28. Measurements were taken at 3 levels of ... -
Factors that influence yield in close-spaced coffee.
(1985-07)Yield components (total and bearing nodes, fruits per node and fruits per primary) were compared in five tree densities with and whithout irrigation using Coffea arabica L cultivar SL 28. Measurements were taken at three ... -
Arabica coffee production in Kenya: an overview.
(1986)The cultural practices, crop protection and breeding programmes in Arabica coffee in Kenya are reviewed. Examples of major insect pests are leaf miners (Leucoptera spp.), antestia bugs (Antestiopsis spp.) and scales. Major ... -
Effects of some seed advancement treatments on the germination of Coffea arabica L. [coffee hybrid] seeds [in Kenya]
(1986)Wighed seeds of four varieties of Coffea arabica L. were subjected to some seed advancement treatments. The treatments resulted in earlier germination but did not increase the final germination percentage. It is concluded ... -
Effects of some seed advancement treatments on the germination of Coffea arabica L. seeds
(1986)Weighed seeds of four varieties of Coffea arabica L. namely: SL28, SL34, K7 and Ruiru 11, a hybrid, were subjected to some seed advancement treatments. The treatments were allowing the seeds to imbibe known quantities of ... -
Plant regeneration via somatic embryogenesis in mature embryo-derived callus culture of Sinocalamus latiflora (Munro) McClure
(Science Direct, 1987)Somatic embryogenesis and subsequent formation of plantlets was achieved from callus cultures derived from mature zygotic embryos of Sinocalamus latiflora (Munro) McClure (Bamboo). Embryogenic callus was initiated on ... -
Nutrient-phytoplankton relationships in a tropical meromictic soda lake
(Kluwer Academic Publishers, 1988)Seasonal variation through one year in total nitrogen (TN), total phosphorus (TP), phytoplankton biomass, phytoplankton species composition and other environmental factors were examined in Lake Sonachi, a tropical meromictic ... -
Effects of irrigation rates and frequency on the growth and yield of arabic coffee
(1988)A trial was set up to find out the optimum irrigation rate and interval and their effects on tree growth and yield of Arabica coffee. The irrigation rates were 38, 76 and 100 mm of water applied at 14, 21 and 28 days ... -
Tree performance at close-spacing as influenced by pruning cycle and site
(1988)Data on 10 years of productions / Coffea arabica / variety Caturra (dwarf type) and SL28 (high type) grown at 1400, 1600 or 1800 meters, at densities of 2,222, 3,322, 5,000 and 7,463 trees / ha, are presented pruning cycles ... -
Susceptibility of eight potato cultivars to Myzuz pericae Silver in the Green House.
(Cambridge University Press, 1989-04)Eight potato cultivars namely Anett, Desiree, Feldeslohn, Kerr's Pink, Kenya Baraka, Roslin Eburu, Roslin Gucha and Roslin Tana were tested in the greenhouse to compare their susceptibility to Myzus persicae Sulzer. ... -
Density and fertilizer requirements of the compact and disease resistant arabica coffee.
(1990)Sixteen NPK fertilizer combinations and 6 coffee planting densities were tried in Kenya between 1981 and 1988 using the compact and disease resistant Catimor. Yield differences due to fertilizer treatments were not ... -
The conversion of 2-furaldehyde into some potentially useful bifunctional derivatives
(Elsevier B.V., 1990)2-Fluraldehyde was converted into 2-(5-R-2-furyl)-1, 3-dioxanes; 5-R-2-cyanofurans where R = H, Br, I or NO2; bis(5-bromo-2-furyl-1,2-R diimine where R = ethyl or butyl; and 5-hydroxymethyl-2-furaldehyde. Furfuryl alcohol, ... -
Effects of ergostim biostimulant on the growth, yield and quality of Arabica coffee
(1991)The effect of Ergostim (folic acid plus L-cysteine) A bioestimulante on growth, yield and quality Arabica coffee, was studied in a field trial in Kenya. Ergostim was sprayed at rates of 0, 250, 500, 750 and 1000 ml per ...
