Browsing by Author "Renga Ayyar, G"

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    Biology of Parasa lepida cram.,a pest of coconut in Kerala
    (Kerala Agricultural University, Vellanikara, 1968) Pillai, K S; Renga Ayyar, G
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    Studies on the effect of host nutrition on the larval parasite, Microbracon brevicornis Wesmael (Braconidae: Hymenoptera)
    (Division of Entomology, Agricultural College and Research Institute, Vellayani, 1965) Susamma Mathai; Renga Ayyar, G
    Literature on effect of nutrition on fecundity, development and longevity of insects with special reference to entomophagous forms has been reviewed. Comparative studies of eleven different nutrient media were made to ascertain their effect on the development and growth of the larvae of Corcyra cephalonica (Stainton) using coarsely ground wheat flour as a medium of basic diet. The larval duration was considerably reduced,by 10-14 days when the larvae were reared in a medium of basic diet containing coarsely ground wheat flour to which either fructose , or a combination of black gram powder and glucose fortified with yeast were added. The pupal duration of Corcyra cephalonica was not much affected by various nutrient media , through addition of bengal gram powder to basic diet in the larval nutrition shortened the pupal period by two days.
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    Studies on the hairy caterpillar pests of cardamom in Kerala
    (Kerala Agricultural University, Vellanikara, 1961) Renga Ayyar, G
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    Studies on the susceptibility of the common caterpillar pests to infection
    (Division of Entomology, Agricultural College and Research Institute, Vellayani, 1964) Thomas, M J; Renga Ayyar, G
    Literature on Bacillus thurimgiensis Berlinerin relation to insect pest control has been reviewed. Susceptibility of twentysix diferent species of caterpillar pests, commonly occuring in Kerala, to infection by B. thuringiensis spores has been ascertained. Susceptibilityof seventeen of these caterpillars to the bacterium has been tested for the first time. In a screening experiment all the twentysix species of caterpillars have been infected by feeding them with food materials dipped in the spore suspension of B. thuringiensis containing 12.5 x 10 spores per 100 cc.