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Permanent URI for this collectionhttp://localhost:4000/handle/123456789/1975
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Item On the control of the jassid Amrasca Biguttula biguttula (Ishida) on bhindi using some new insecticides(Kerala Agricultural University, 1976) Nair, M R O K; Christudas, S P; Susamma MathaiItem Control of the insect pests affecting cowpea Vigna Sinensis(Kerala Agricultural University, 1977) Das, N M; Susamma Mathai; Christudas, S PIn a field experiment conducted in the red soil of Agricultural College Farm, Vellayani applying thimet, disulfotan, rnephosfolan and carbofuron granules at three different levels, applied at the' time of sowing, disulfoton at 1 kgai/ha was found an effective and economic method for controlling pea aphid upto 5 weeks after sowing. In another field experiment it was observed that spraying of different insecticides commencing from the time of flowering along with one application of disulfotan granules at the rate of 1 kg ai/ha at the time of sowing reduced the incidence of pea aphid and pod borers and increased the yield significantly. On a benefit cost ratio basis the effective insecticides could be ranked as follows: f enithion >f enitrothion > monocrotophos > carbaryl > phosalone > quinalphos.Item Chemical control of the rice leaf roller Cnaphalocrocis Medinalis Guen(Kerala Agricultural University, 1977) Thomas, B; Karunakaran, KA field trial was conducted in the Rice Research Station, Pattambi for four consecutive seasons in 1974-75 and 1975-76 with a view to study the relative efficiency of ten insecticides against the Rice Leaf roller Cnaphalocrocis medinahs. Leptophos, monocrotophos, ethyl parathion, quinalphos and dicrotophos applied at 0.25 kg a.i/ha and carbaryl applied at 0.5 kg a.i/ha were highly effective in checking the pest incidence.Item Relative toxicity of some of the newer insecticides to adults of Euscyrtus Concinnus haan (Eneopteridae:Orthoptera)(Kerala Agricultural University, 1981) Baby P Skariah; Das, N M