author(s)
K Haripriya and S Jeyarani

abstract
Laboratory experiments were conducted to test the efficacy of biopesticides viz., Emamectin benzoate, Spinosad and Azadirachtin against third, fourth and fifth instar larvae of Maruca vitrata on different pulses namely black gram, green gram, lablab, cowpea and pigeonpea. Among the three biopesticides tested, spinosad 45% SC was found to be highly effective against third, fourth and fifth instar larvae on all the pulses tested. The lowest LC₅₀ values were recorded against third (24.20 ppm), fourth (30.69 ppm) and fifth instar (36.56 ppm) larvae on pigeonpea.