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Item Influence of nitrogen and lime on the k/(Ca + Mg) ratio of dinanath grass (Pennisetum pedicellatum Trin.)(Kerala Agricultural University, 1980) Abraham, C T; Sreedharan, C; Raghavan Pillai, GItem Effect of nitrogen and lime on the yield attributes and yield of dinanath grass (Pennisetum pedicallatum Trin.)(Kerala Agricultural University, 1980) Abraham, C T; Raghavan Pillai, G; Sreedharan, CItem Weed management in banana cv. nendran with cowpea as an intercrop(Kerala Agricultural University, 1991) Nybe, E V; Abraham, C T; Suma, AItem Time of application of pre-emergence herbicides in dry-sown rice(Kerala Agricultural University, 1991) Suja, G; Abraham, C TA field experiment was conducted at the Agricultural Research Station, Mannuthy under the Kerala Agricultural University during the first crop season of 1988 to find out the optimum time of application of the pre-emergence herbicides, butachlor and thiobencarb and to assess the scope of second application of these herbicides for efficient weed control in dry-sown rice. Major part of the weed flora of the experimental field was constituted by grasses and sedges. Control of Eehinochloa colons and other grasses was very effective in the treatments where thiobencarb was applied at 0, 3 or 6 days after sowing (DAS) and repeated at 25 DAS whereas almost all the butachlor treatments gave complete control of sedges. The population and drymatter production of weeds were appreciably reduced by the repeated application of thiobencarb and resulted in improvement of growth, yield attributes and yield of rice. These treatments also reduced the crop-weed competition for major nutrients N, I' and K.Item The weed flora in surgarcane fields of Palghat district(Kerala Agricultural University, 1993) Girija Devi, L; Neelakantan Potty, N; Abraham, C T; George ThomasItem Method and time of application of thiobencarb in dry-sown rice(Kerala Agricultural University, 1993) Jayasree, P K; Abraham, C TItem Sequential and tank-mix application of herbicides in dry-sown rice(Kerala Agricultural University, 1995) Jolly Chacko Palaikudy; Abraham, C TItem Weed flora and their relative dominance in semi-dry rice culture(Kerala Agricultural University, 1997) George Thomas, C; Abraham, C T; Sreedevi, PItem Standardization of bioassay technique for determining butachlor residues in kole soils of Kerala(Kerala Agricultural University, 1999) Durga Devi, K M; Abraham, C T; Prabhakaran, P VDifferent plant species were grown in pots containing soil fortified with known quantities of butachlor and based on the response to the herbicide amaranth was selected as the indicator plant for the herbicide. Among the several growth parameters tested for assessing the plant response to soil residues of butachlor, CSGR (compound shoot growth rate) proved to be the best for quantitative determination of butachlor residues in kole soils of Kerala.Item Natural enemies on Mikania micrantha H.B.K. in Kerala(Kerala Agricultural University, Vellanikara, 2002) Mini, Abraham; Abraham, C T; Joy, P JLaboratory and field investigations were conducted to identify the natural enemies of Mikania micrantha H.B.K. and to evaluate their efficacy as biocontrol agents. During a survey on the distribution of Mikania in Kerala, pests seen on this weed were collected. Nineteen species of insect pests and a species of mite belonging to 15 families and eight orders were identified. Nature and extent of damage caused by these different pests on Mikania were studied. Among them tea mosquito bug (Helopeltis theivora) caused serious damage on Mikania. All these pests are polyphagous in nature. So further scope for utilizing them as biocontrol agent is limited.