Browsing by Author "Suma Kuruvilla"

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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 Jacob
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
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 A
Mass culturing of Fusarium Oxysporum Schlect, an entomogeous fungus of brown plant hopper Nilaparvata Lugens stal
(Kerala Agricultural University, 1981) Suma Kuruvilla; Abraham Jacob
Studies 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.
Studies on Fusarium Oxysporum Schlect infecting rice brown plant hopper Nilaparvata Lugens Stal
(Kerala Agricultural University, 1980) Suma Kuruvilla; Abraham Jacob
Growth 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.