Vol. 9 No. 2
Field efficacy and cost benefit ratio of some newer insecticides against spotted pod borer (maruca testulalis geyer) on black gram
Author(s): D. MANDAL, P. BHOWMIK, K. BARAL ANDM.L. CHATTERJEE
Abstract: A field experiment was conducted during 2008 and 2009 to evaluate the efficacy of some insecticides against spotted pod borer (Maruca testulalis Geyer) of black gram. Insecticides evaluated for the purpose were azadirachtin1500 ppm @ 1.5 l ha-1, endosulfan35EC @ 300 g a.i. ha-1, triazophos40EC @ 250 g a.i. ha-1, thiamethoxam25WG @ 40 g a.i. ha-1, lambda cyhalothrin5EC @ 40 g a.i. ha-1, indoxacarb14.5SC @ 75 g a.i. ha-1, and imidacloprid17.8SL @ 30 g a.i. ha-1. Two round of spray of insecticides were given at fifteen days interval. The most effective insecticide evaluated against spotted pod borers was indoxacarb. Highest incremental cost benefit ratio was observed with triazophos40EC @ 250 g a.i ha-1, being 21.53..
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