2002•Pesticide Research JournalRequires access

Toxicity of Malathion to Gamma-irradiated and Non-irradiated Adults of Pulse Beetle Callosobruchus maculatus (Fabricius)

M H Kodandaram, A. K. Garg, C.P. Srivastava

Abstract

The effect of sub-sterilizing dose of gamma radiation (8Gy) was investigated by film method in the laboratory on the toxicity of malathion to adult pulse beetle Callsobruchus maculatus The LC50 value of malathion against one day-old non-irradiated adults was 4.5 ppm whereas that for irradiated one was 0.5 ppm. Thus results indicated that the combined use of radiation + malathion reduced the requirement of insecticide by 9 times. Though, no significant difference in LC50 of malathion to non-irradiated insects was found within 24–72 h but it was noticed between LC50 and LC90 values in both the cases.

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Key concepts: Malathion, Callosobruchus maculatus, Toxicology, Irradiation, Gamma irradiation, Biology, Toxicity, Pesticide