author(s)
PD Bhojane, CS Chaudhari, SA More, IA Ghonmode and YB Phadatre

abstract
The present experiment “Bio-rational Management of Thrips (Thrips tabaci Lindeman) Infesting Cucumber under Polyhouse Condition” was conducted to study biointensive approaches against thrips on cucumber under polyhouse condition during rabi 2018. The treatments, Neem oil @ 1 ml/l, Karanj oil @ 1 ml/l, Metarhizium anisopliae@ 4 gm/l, Lecanicillium lecanii@ 4 gm/l, Mineral oil hortimin @ 0.5 ml/l, Polyether Modified Trisiloxane @ 0.25 ml/l, were evaluated along with the standard check of lamda-cyhalothrin @ 0.5 ml/l. Among the bio-rational components entomopathogenic fungi, Lecanicillium lecanii and Metarhizium anisopliae proved to be effective, having gradual cumulative reduction after the application of consecutive sprays. Among the oils, neem oil (botanical) @ 1 ml/l and Hortimin @ 0.5 ml/l were the second best bio rational components. The treatment with lambda cyhalothrin @ 0.5 ml/l was significantly superior in the suppression of thrips and yield.