2. Institutional Publications
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Item Changes in haemocyte counts in larvae of Spodoptera Mauritia (Boisduval) infected with a nuclear polyhedrosis virus(Kerala Agricultural University, 1974) Lathika, P; Abraham JacobItem Nature of inclusion bodies of a nuclear polyhedrosis virus of Diacrisia obliqua (Walker)(Kerala Agricultural University, 1974) Abraham Jacob; Thomas, M JItem Effect of a nuclear polyhedrosis on some mineral contents of Spodoptera Litura F.(Kerala Agricultural University, 1974) Abraham Jacob; Subramaniam, T RThe change in the levels of calcium, magnesium, sodium and potassium in the larvae of Spodoptera litura during the course of a nuclear polyhedrosis were studied. Calcium and potassium contents decreased in the diseased larvae especially towards the later stages of infection while the levels of magnesium and sodium were not affected.Item Fusarium Moniliforme var Subglutinans Wollenw. & Reink., pathogenic to the spotted beetle Epilachna Vigintioctopunctata F(Kerala Agricultural University, 1978) Abraham Jacob; Suma Kuruvilla; Babu P Philip; Rajan Asari, P AItem Comparative susceptibility of nymphs and adults of Nilaparvata lugens stal to Fusarium Oxysporum Schlect and its use in microbial control(Kerala Agricultural University, 1979) Suma Kuruvilla; Abraham JacobItem Influence of nuclear polyhedrosis on moulting in the larvae of Pericallia Ricini F.(Kerala Agricultural University, 1980) Vasudevan Nair, K P; Abraham JacobItem Histopathology of a granulosis virus of Pericallia Ricini F. (Arctiidae:Lepidoptera)(Kerala Agricultural University, 1980) Babu M Philip; Abraham JacobHistopathology of a granuiosis of the larvae of Pericallia ricini F,, is described. Adipose tissues were the major sites of virus infection. Moderate infection was observed in hypodermis and tracheal matrix cells Capsules were first observed in many fat body cells and in a few cells of the trachea! matrix and hypodermis in 96 hours after infection. By 192 hours after treatment, infection had spread to the entire adipose tissues.Item Studies on Fusarium Oxysporum Schlect infecting rice brown plant hopper Nilaparvata Lugens Stal(Kerala Agricultural University, 1980) Suma Kuruvilla; Abraham JacobGrowth and sporulation of Fusarium oxysporum Schlect, an entomogenous fungus of the rice plant hopper Nilaparvata lugens Stal were superior in oat meal agar closely followed by potato dextrose agar. Czapeck's and Richards' agar media were lesssuitable. In all these media, only microconidia were produced. Maximum number of spores were produced on the fifth day, after which the spore production decreased. Virulence was highest in spores of four and five-day-old cultures and spores of cultures more than five day old showed decreasing virulence.Item Mass culturing of Fusarium Oxysporum Schlect, an entomogeous fungus of brown plant hopper Nilaparvata Lugens stal(Kerala Agricultural University, 1981) Suma Kuruvilla; Abraham JacobStudies were conducted to evolve suitable techniques of mass culture of Fusarium oxysporum Schlect infecting the rice brown plant hopper. The results showed that green gram, wheat or sorghum could be used as substrates for eosy mass production of the fungus as they produced maximum spores with high virulence. Further, for better growth and sporulaticn, a combination of 30 g of material +25 ml of water was found to be the optimum.Item Effect of some pesticides on the growth and sporulation of Fusarium Oxylporum Schlect palhogenic to brown plant hopper Nilaparvata Lugens Stal(Kerala Agricultural University, 1981) Suma Kuruvilla; Abraham Jacob