SEASONAL INCIDENCE OF INSECT PESTS OF CUCUMBER AND THEIR MANAGEMENT THROUGH NEWER MOLECULES OF INSECTICIDES
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Date
2010-08-30
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University of Agricultural Sciences Raichur
Abstract
Studies on the seasonal incidence and management of insect pests of cucumber through newer molecules of insecticides was undertaken at the Department of Entomology and MARS, University of Agricultural Sciences, Raichur during 2009-10.
Survey results indicated that fruit fly damage was more during Kharif/rabi, season in all the districts surveyed. Other pests viz., aphids, thrips, whiteflies, leaf miner, melon worm and red pumpkin beetles were low. Whereas, fruit fly incidence were low during rabi/summer and other pests were high during rabi/summer.
Impact of different sowing dates on the seasonal incidence of insect pests indicated that the activity of aphid was maximum during October-December. Whereas, thrips were maximum during March-April, whiteflies were maximum during August and December; leaf miner damage was highest during August and October. Peak incidence of melon worm was in the months of September and December. Maximum population of melon weevils and red pumpkin beetles were observed during November-December and fruit fly between September-October.
Acephate 75 SP at 1.00 g/l was found to be superior and closely followed by clothianidin 50 WDG and imidacloprid 17.8 SL at 0.3 ml/l and recorded higher yield and seed treatment with imidacloprid 600 FS at 4.66 ml/kg seeds was proved to be effective upto 30 days after sowing against sucking pests. Among the chemicals evaluated against the defoliators and the fruit borers, rynaxypyr 20 SC at 0.15 ml/l was superior followed by flubendiamide 20 SG and acephate 75 SP against leaf miner. Rynaxypyr 20 SC proved to be effective in controlling melon worm followed by emamectin benzoate, spinosad and flubendiamide. The chemical acephate 75 SP was superior in reducing fruit fly damage which was closely followed by commercial neem and rynaxypyr 20 SC with higher yields.
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