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Item Effect of soil application of fertilizers and micronutrients on root (wilt) disease and yield of coconut in the back water region of Kerala(Kerala Agricultural University, 1978) Mathai, G; Vasudevan Nair, K PItem Effect of residue salt bitters on the yield and foliar yellowing intensity of coconut palm(Kerala Agricultural University, 1979) Mathai, G; Vasudevan Nair, K PItem Effect of potash application on the incidence of brown plant hopper(Kerala Agricultural University, 1979) Ittyavirah, P J; Vasudevan Nair, K P; Thomas, M JItem On the occurrence of Coccinella Arcuata fabricius (Coleoptera:Cocci nellidae) as a predator of rice thrips in Kerala(Kerala Agricultural University, 1977) Mammen, K V; Vasudevan Nair, K PItem Influence of nuclear polyhedrosis on moulting in the larvae of Pericallia Ricini F.(Kerala Agricultural University, 1980) Vasudevan Nair, K P; Abraham JacobItem Relative toxicity of the nuclear polyhedrosis virus of Spodoptera mauritia (Biosduval) to different larval instars of the host(Kerala Agricultural University, 1987) Vasudevan Nair, K P; Abraham JacobBioassay of the NPV of Spodoptera mauritia (Biosduval) showed that LC50 increased with larval age. The LC50 ranged from 3558 PIBS/ml for the second instar to 808700/ml for sixth instar. An inverse relationship between LTSO and concentration of the virus was observed.