Toxicity of Pyriproxyfen against Tobacco Caterpillar, Spodoptera litura (Fabricius)

Kamalpreet Kaur; Anureet Kaur Chandi

Volume : IV, Issue : XI, November - 2015

Toxicity of Pyriproxyfen against Tobacco Caterpillar, Spodoptera litura (Fabricius)

Kamalpreet Kaur, Anureet Kaur Chandi

Abstract :

Second instar larvae of Spodoptera litura were exposed to seven different concentrations of pyriproxyfen using leaf–disc dip method of bioassay to estimate the toxicity. The exposure of the second instar larvae of S. litura to the leaf–discs treated with the highest concentration of 0.05 per cent of pyriproxyfen for 24 and 48 hours resulted in the 30 and 54 per cent mortality against 96 per cent mortality recorded when the test–larvae were allowed to feed on the pyriproxyfen–treated leaf discs for 72 hours. The LC30 and LC50 were worked out to be 0.018 and 0.025 per cent of pyriproxyfen, respectively. Due to low mammalian toxicity and safety to non–target organisms coupled with its physiological influences against S. litura, pyriproxyfen can prove to be an effective tool for the management of S. litura.