Management of Sucking Pest Complex in Parthenocarpic Cucumber Under Protected Cultivation

Abstract

A study was carried out for the management of key pests of parthenocarpic cucumber newlineunder protected condition during 2017-2019 at UAS, Dharwad. Major sucking pests of newlineparthenocarpic cucumber under protected condition were Tetranychus urticae (Koch) on the newlinesummer crop (March-June) and Aphis gossypii Glover during the winter crop (August to newlineNovember). Maximum temperature had positive relation with T. urticae population and that newlinewas negative with the population of A.gossypii. The Oligota sp and Stethorus sp were major newlinenatural enemies of T. urticae recorded during the study. Important natural enemies of A. newlinegossypii recorded during the study period were Aphidoletes sp, Binodoxys basicurvus and newlineFusarium equiseti. Among the genotypes screened against the mite, KPCH-1 was found to newlinehave less damage for the mite infestation. Yellow sticky traps attracted more number of newlineaphids, whiteflies and leafminers. Anisaldehyde smeared yellow sticky traps found to attract newlinemore number of leafminer parasitoids. When anisaldehyde was sprayed on cucumber plants, newlineincrease in the population of natural enemies was observed. Under laboratory condition the newlinebest combination of biorationals giving cent per cent mortality against both the sucking pest newlinewas ASO+ CASE + PSE+ NSKE (2:1:2:2) at5%. The next best treatment was spiromesifen newlineagainst the mite and spinosad against the aphid. IPM module II consisting of yellow sticky newlinetrap, Anisaldehyde at 0.05 ml/l, Verticillium lecani and CASE + NSKE + PSE + ASO newline(2:1:2:2) at5 % had maximum percent reduction of aphid and also attracted more number of newlinenatural enemies. IPM module III containing yellow sticky trap, neem oil 1% ECat 2ml/l, newlinespiromesifen 0.6 ml/l had maximum percent reduction of mite with lesser number of natural newlineenemies when compared to IPM II. Further, IPM module II produced higher yield (152.59 newlineMT/ha) and the benefit cost ratio of 2.37. All the IPM modules performed better than the newlinecontrol plot. newline