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Theses

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1945 - 194911960 - 19644
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Subject: Entomology × Author: KAU × End date: 1964 ×
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Now showing 1 - 5 of 5
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    ThesisItemOpen Access
    Studies on the effect of refrigeration on the deveolopment of Trichospilus pupivora ferriere (Eulophidae)
    (Division of entomology ,Agricultural college and research institute ,Vellayani., 1964) Narayanan, N J; KAU; Gopalakrishnan Nair, M R
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    ThesisItemOpen Access
    Review of the insect pests of pulsecrops and studies on the biology of the pea leaf roller Nacoleia vulgalis Guence (Pyralidae)
    (Division of Entomology, Agricultural College and Research Institute, Vellayani, 1963) Mammen, K V; KAU; Joseph, K V
    Literature on the insect pests of the important pilse crops, with special reference to the work done in India has been reviewed. The biology and bionomics of the pea leaf roller Nacoleia vulgalis Gn. (Pyralidae) have been worked out in detail. The moths mate a day after emergence. The female moth lays creamy yellow, oval, scale like eggs during night in rows, generally on tender leaves . On an average , about 542 eggs are laid by one female. Incubation period is 4 days. Larval period lasts 13 to 15 days, the larva undergoing five instars. Durations of the different instars are 3 to 4 , 2 to 3, 2 to 3, 2 to 3 and 4 to 6 days respectively. The first instar caterpillars nibble and feed on the green matter on the undersurface at the base of the leaves and the later stage caterpillars web the leaves together and feed from inside skeletonising the leaves.
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    ThesisItemOpen Access
    Studies on the susceptibility of the common caterpillar pests to infection by Bacillus thuringiensis Berliner
    (Division of Entomology, Agricultural College and Research Institute, Vellayani, 1964) Thomas, M J; KAU; 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.
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    ThesisItemOpen Access
    Studies on the influence of host and induced superparasitism on the pupal parasite Trichospilus pupivora Ferriere (Eulophidae)
    (Division of Entomology, Agricultural College and Research Institute, Vellayani, 1963) Jayarathnam, K; KAU; Joseph, K V
    The literature on the effect of host on parasites and that on Trichospilus pupivora has been reviewed. The total number of adults produced, sex ratio, developmental period, longevity and size of T. pupivora were accertained when bred on eight different speciesof host pupae, namely (1) Phytometra peponis (2) Prodenia litura, (3)Orthaga exvinacea, (4) Sylepta derogata, (5) Lampides boeticus, (6) Margaronia indica, (7) Nephantis serinopa, and (8) Gracillaria soyella. Correlation and regression studies show that there exist, a highly significant and positive linear correlation between the weight of the host pupa on the one hand and the number of parasites emerged, the proportion of females , the developmental period and the size of the parasites emerged, the proportion of females, the developmental period and the size of the parasites on the other. There does not appear to be any correlation between longevity of parasites and weight of host pupa.
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    ThesisItemOpen Access
    Studies on the insect pests of cardamom in Travancore
    (The University of Travancore, Trivandrum, 1945) Ronga, Aiyar, G; KAU