Department of Entomology & Agricultural Zoology, College of Agriculture, Rajendra Agricultural University, Pusa, (Samastipur) - 848125, Bihar, (India).
Seven insecticides, viz., phorate (10G) and carbofuran (3G) each @ 1 kg a.i./ha as soil treatment once before sowing; and endosulfan 0.07% foliar spray and dusting of each of quinalphos (1.5% dust), fenvalerate (4% dust), methyl parathion (2% dust) and malathion (5% dust) @ 20 kg/ha were used twice during the crop season for the control of jassids (Empoasca kerri Pruthi), Bihar hairy caterpillar (Spilosoma obliqua Wlk.) and the pod borer (Maruca testulalis Geyer). The treatment differences were statictically significant. Spraying with 0.07% endosulfan or dusting with 2% methyl parathion dust were significantly superior in respect of minimising the damage due to these three pests and increasing the yield as compared to the remaining treatments. The cost-benefit ratio and the net profit from treated plots indicated that 2% methyl parathion dpst treatment was the best followed by 0.07% spraying of endosulfan emulsion, the net profit accruing was Rs 1526.50 and Rs 1250.00 per ha respectively.
