2012•Indian Journal of EntomologyRequires access

Relative toxicity of insecticides on larval stages of green lacewing, Chrysoperla sp. (Carnea-group) (Chrysopidae: neuroptera)

Vivek Shah, Paul Bishwajeet, G. Guru Pirasanna Pandi, Karuppan Shankarganesh

Abstract

Laboratory studies were conducted on the toxicity of Neembaan®, imidacloprid, acetamiprid, thiamethoxam and buprofezin on larvae of Chrysoperla sp. (carnea-group). Acetamiprid was observed to be highly toxic. Based on the LC50, the descending order of toxicity was acetamiprid (0.005)>, thiamethoxam (0.006)>, imidacloprid (0.013)>buprofezin (0.241)> and neembaan (< 50% mortality at highest concentration). Imidacloprid at field recommended dose (0.005%) caused 26.00% mortality at 24 hours after treatment. Neembaan® proved to be the safest whereas, buprofezin was safe and exhibited slight harmful effect at high concentration.

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Key concepts: Chrysopidae, Acetamiprid, Thiamethoxam, Chrysoperla carnea, Neuroptera, Imidacloprid, Toxicology, Biology