Browsing by Author "Muthamia, J. M."

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Control of Chickpea Root knot Nematodes(Meloidogyne spp.) in Nakuru County, Kenya using Sudan Grass (Sorghum sudanese)
(Egerton University, 2018-01) Kimani, I.M.; Muthamia, J. M.; Otaye, D.O.
Chickpea is a source of food and nutrients to farmers. Chickpea growth and yield production is affected by root knot nematodes. Loss of yields from chickpeas are estimated billions of money annually. Sudan grass (Sorghum sudanese) was used to study the control of root knot disease in chickpea. The study was done in a glasshouse. Completely random design was used. Treatments had eight replicates and uninoculated control was treated with distilled water. The aim of the study was to control root knot nematodesusing Sudan grass. There was significant reduction of root galling, gall index and number of juveniles in the soil at P=0.05 in Sudan grass treatment. Inoculated control recorded highest gall ratings, gall index and number of juveniles. There was a relationship between gall index and root weights. Roots with highest and lowest gall index were associated with high and low root fresh and dry weights respectively. The results of this study confirm the nematicidal effect of poultry manure and Sudan grass.
The Use of Trichoderma Viride C. in the Management of Chilli Root Knot Disease in Nakuru County, Kenya
(Egerton University, 2018-01) Waweru, C. M.; Muthamia, J. M.; Otaye, D. O.
Chilli (Capsicum annum L.) is a sub-tropical crop grown for its pungent tasting fruits and sour leaves. Kenya is among the largest exporters of chilli. Chilli yields are largely reduced by sedentary nematodes (Meloidogyne spp). Chillis are prone to root knot nematodes which reduce the quality and yields. This study focused on the use of Trichoderma viride as a potential biocontrol agent against root knot nematodes. Investigation was done on the effect of Trichoderma viride at different concentrations on the plant height, leaf number, stem diameter, number of galls, nitrogen and phosphorous levels in chilli infected with root knot nematodes. Four dilutions of Trichoderma viride were obtained through serial dilution (100%, 50%, 25% and 12.5%). Bio-control efficacy of Trichoderma viride against the root knot nematodes was tested under glasshouse and field conditions. Evaluation after treatment of plants with T. viride isolates showed that there was no significant effect on plant heights, number of galls, stem diameter or leaf number in chilli. There was significant difference in the nitrogen and phosphorous levels when different treatments of Trichoderma viride were applied on chilli with root knot nematodes