2. Institutional Publications
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Item On the persistent toxicity of various insecticides sprays to first instar caterpillars of Cnaphalocrocis Medinalis guenee, the rice leaf-roller(Kerala Agricultural University, 1976) Mohandas, N; Nair, M R G KItem Residues of fenthion, quinalphos and malathion in paddy grains following surface treatment of gunny bags(Kerala Agricultural University, 1986) Ambika Devi, D; Mohandas, N; Visalakshy, AItem New disease of the Indian honey bee, Apis Cerana Indica F., in Kerala(Kerala Agricultural University, 1992) Abraham Jacob; Rajan Asari, P A; Mohandas, NItem Compatibility of insecticides and fungicides on the mortality of Nilaparvata lugens (Stall.) and on the inhibition of rhizoctonia solani kuhn.(Kerala Agricultural University, 1993) Babu, K; Reghunath, P; Mohandas, N; Wilson, K IThe compatibility of insecticides and fungicides commonly used for the control of insect pest and disease of rice was studied in the laboratory using Nilaparvata lugens and Rhizocfonia sdanl as lest organisms. By fixing the proportion of constituents in the insecticidal, fungicidal mixture judiciously, it may be possible to reduce the field dose of insecticide as there was synergism in the insecticidal activities of lower dose of quinalphos when combined with different doses of fungicides. The fungicidal effectsof the three fungicides were signifcantly altered when combined with insecticides. Combination with fungicides showed an antagonistic effect at higher levels of captofol, ediphenphosand carbendazim, while at lower concentrations there was enhancement of fungicidal effect.