Vol. 8 No. 2
Studies on some insecticides with novel mode of action for the management of tomato fruit borer (Helicoverpa armigera Hub.)
Author(s): A. GHOSAL, M. L. CHATTERJEE AND D. MANNA
Abstract: Field experiments were conducted to observe, the efficacy of some pesticides with novel mode of action (spinosad, rynaxypyr, indoxacarb, flubendiamide) for the management of Helicoverpa armigera on tomato (Var. Pathorkuchi) in field condition, during the rabi season of 2010 and 2011 at Horticultural Research Station, Mondouri B.C.K.V., W.B. Results of insecticides applied thrice at 15 days interval after borer population build up showed that rynaxypyr 18.5% SC @ 40 g a.i. ha-1 was superior over other treatments against Helicoverpa, with 98.04% reduction, closely followed by spinosad 45% SC @ 60 g a.i. ha-1 (88.03%), flubendiamide 20% WG @ 30 g a.i. ha-1(87.96%), rynaxypyr 18.5% SC @ 20 g a.i. ha-1 (85.84%) and indoxacarb 14.5 SC @ 75 g g a.i. ha-1 (80.21%). The same trend was followed in case of yield also, rynaxypyr @ 40 g a.i. ha-1 recorded the highest fruit yield of 34.74 q ha-1.
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