Abstract

In Japan, dialkylaryl phosphorothioate insecticides such as ethyl parathion (O,O-diethyl O-p-nitrophenyl phosphorothioate), methyl parathion (O,O-dimethyl O-p-nitrophenyl phosphorothioate) and Sumithion [O,O-dimethyl O-(4-nitro-m-tolyl) — phosphorothioate] are widely used to control the larvae of the rice stem borer, Chilo suppressalis. Sumithion has very low toxicity against mammals (Nishezawa et al. 1961), although its chemical structure is very similar to that of methyl parathion which is highly toxic to mammals. Several years ago, we found the development of resistance for ethyl parathion to the larvae of rice stem borer. Therefore, it is worth while to study differences of metabolism of these insecticides in mammal, insect, and plant.KeywordsMethyl ParathionSelective ToxicityOrganophosphorus InsecticideRice Stem BorerEthyl ParathionThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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