Abstract
Cotton is the most important commercial crop of Telangana State with an area of 1.41 M ha., covering more than 95 per cent under Bt. Sucking pest infestation is the major biotic constraint responsible for considerable yield loss and high consumption of insecticide in cotton. As an alternative to chemical spray, stem application technology was assessed for the sucking pest management of cotton in the farmer's field of Karimnagar District for the five years starting from 2014–15. Imidacloprid (18.5 SL) solution @ 1: 20 dilution was applied for three times at 20, 40 and 60 DAS. It was effectively controlled the sucking pests of cotton by reducing number of sprays and saved 74.95 per cent of insecticide (249.49 g.ai/ha). Cost saving of Rs. 3, 340/ha., coupled with 8.11 per cent increase in yield resulted in additional net returns of Rs. 7, 810/ha., over control. Obtained high B: C ratio of 1.86 compared to control (1.59). Over all cumulative monitory benefit of Rs. 6, 49, 300/-was realised in an area of 20.0 ha., over five years.
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