POOJA GANGWAR, NEETA GAUR AND PARUL CHAUDHARY

Toxicity of emamectin benzoate, an evermectin semi synthetic insecticide, was evaluated in the laboratory to determine its performance on 7–days old larvae of tobacco caterpillar, Spodoptera litura during 2009–10. Leaf dip bioassay method was used. Emamectin benzoate (5% WG) was compared with standard treatments, ethion and triazophos, against the test– insect. Median lethal concentration (LC50) of the emamectin benzoate (5% WG) 5.6 g a.i / ha, triazophos (40% EC) @ 250gai/ ha and ethion (50% EC) @ 750gai/ ha against 7–day–old larvae were recorded as 0.6 ppm, 229 ppm and 1271 ppm respectively.