Based on the economic threshold level (5% boll worm infestation) the number of insecticidal sprays could be minimized to 2 in case of decamethrin and fenvalerate, 3 In case of chlorpyriphos, 4 in case of monocrotophos and endosulfan and 5 in case of carbaryl. Irrigated HX 11 protected with decamethrin @ 0.1 kg a. ijha at 53 and 88 days after sowing (DAS) gave highest yield (1978 kg/ha) of seed cotton at against 980 kg in the untreated chock. The corresponding yields in NCT 19 were 1031 and 671 kg/ha. Timely irrigation alone increased the seed cotton yield by 44.9 % in HX 1 and 36.8% in NCT 19 over the rainfod crops.
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