Biological Compatibility of Carbosulfan with Methyl Demeton, Carbendazim, Magnesium Sulphate and Their Effects on Sucking Pests of Cotton*

Studies were carried out to evaluate the bioefficacy of carbosulfan 25 EC alone and in combination with methyl demeton, carbendazim and magnesium sulphate as foliar spray against sucking pests of cotton viz., aphids, leafhoppers and thrips. Results revealed that after three consecutive applications of carbosulfan 25 EC @ 250 g a.i.ha⁻¹ at 15 days interval brought down the aphids, leafhoppers and thrips population to 3.00, 1.66 and 0.66/30 leaves with the reduction of 98.1, 99.5, and 99.2%, respectively over control on 7 days after treatment (DAT). The toxic effect persisted up to 14 DAT. Further, all the combinations were effective and significantly reduced the sucking pest population without causing any phytotoxicity to cotton plant.