2. Institutional Publications
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Item Screening of cowpea varieties for the rice fallows(Kerala Agricultural University, 1978) Varkey, P A; Sosamma JacobItem Regulation of fecundity, progeny production and female-male composition of Bracon Brevicornis Wesmael (Hymenop Tera : Braconidae)(Kerala Agricultural University, 1980) Sosamma Jacob; Abraham, C C; Joy, P JThe fecundity, progeny production, female-male ccmposition offhe progeny of Bracon brevicorn/s Wesmael as influenced b/ density and weight of host larvae of Corcyra caphalonica Stainton and the sex-ratio of the parent parasite population were studied at three temperature-humidity combinations, namely, 28°C-75% RH (TH,), 30aC-60% RH (THJ and 32°C-50% RH {TH3) • The effect of the main factors on parasite development was found to be modified by the temperature humidity conditions of rearing. The maximum fecundity of the parasite was registered consistently at all the three TH levels at a host density level of two larvae per female parasite and when the parental parasite sex ratio was kept at 2.1 and 3:1 (femalermale). The highest progeny production was attained at the THt and TH^ levels under a host density le/e! of two heavie' (30-35 mg) larvae per female parasite, The influence of host larva! density on the proportion of females was pronounced only at the TH^ level and a density of two larvae per female parasite was found to be better for the production of higher proportion of females. The parental sex-ratios of 1:3 (female : male) produced higher proportion of females at the THLJ and TH3 levels.Item Decontamination of bhindi (Abelmoschus Esculentus Moench) treated with quinalphos(Kerala Agricultural University, 1985) Sosamma Jacob; Shashi VarmaIn an experiment to study the effect of different decontamination processes on the reduction of quinalphos residues on bhindi, it was found that water washing of the fruit resulted in the reduction of initial residues to the extent of 61.86 and 64.35% in the case of fruit treated with spray application of quinalphos at 0.03 and 0.05% respectively on the same day. The residues on washed fruit was below the maximum residue limit at the zero day of the treatment making it safe for consumption on the same day of harvest. Saltwater washing and cooking also, helped to bring down the residues below the MRL at the zero day itself. Out of the three processes of decontamination cooking was found to bring out the maximum reduction of residues.Item Orientational response of leaf hoppers, epilachna beetles and aphids to brinjal plants treated with the sublethal concentrations of decamethrin and carbaryl(Kerala Agricultural University, 1992) Sheila, M K; Abraham, C C; Sosamma JacobItem Toxicity of insecticides against populations OE Amrasca Biguttula biguttula (Ishida) infesting bittergourd from four districts of Kerala(Kerala Agricultural University, 1994) Sabitha, R; Sosamma Jacob; Rao, D SA study was undertaken to assess the relative toxicity of five insecticides against different populations of Amrasca Iriguttula bigiittula collected from four districts of Kerala. Variations were observed in the toxicity of insecticides against different populations.