Title: Evidence of synergism due to alpha and beta isomers of endosulfan in technical material against Spodoptera litura (Fabr.)
Abstract: The biological efficacy of endosulfan and its metabolites was determined against the larvae of Spodoptera litum (Fabricius). All the metabolites of endosulfan were less toxic than endosulfan technical to S. litura. It was only in the later case that LC50 could be calculated as 0.1030. The toxicity of the main metabolites of endosulfan like endosulfan diol and endosulfan lactone was so low that as high as 0.3 per cent concentration showed nil mortality. Endosulfan ether and endosulfan beta ismer (0.3%) gave less than 20 per cent mortality of S. litura larvae. Also, alpha isomer and endosulfan sulphate were practically ineffective, the larval mortality being 28.1 and 25.8 per cent, respectively at 0.2 per cent concentration. Thus, all the metabolites of endosulfan including endosulfan sulphate were practically non toxic to the larvae of S. litura. This suggests that possibly alpha and beta isomers in technical endosulfan produce synergistic action against S, litura larvae.
Publication Year: 1997
Publication Date: 1997-01-01
Language: en
Type: article
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