有機リン剤抵抗性および感受性ニカメイガ幼虫におけるフェニトロチオンの代謝

DOI NDLデジタルコレクション 日本農学文献記事索引 Web Site Web Site 被引用文献2件
  • 昆野 安彦
    Division of Pesticides, National Institute of Agro-Environmental Sciences
  • 宍戸 孝
    Division of Pesticides, National Institute of Agro-Environmental Sciences

書誌事項

タイトル別名
  • Metabolism of Fenitrothion in the Organophosphorus-Resistant and -Susceptible Strains of Rice Stem Borers, <i>Chilo suppressalis</i>
  • 有機リン剤抵抗性および感受性ニカメイガ幼虫におけるフェニトロチオンの代謝〔英文〕
  • ユウキ リンザイ テイコウセイ オヨビ カンジュセイ ニカメイガ ヨウチュウ

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抄録

Metabolism of ring- and methoxy-14C-labeled fenitrothion was examined in the organo-phosphorus-resistant and -susceptible strains of rice stem borer larvae. Major metabolites of fenitrothion in both strains were fenitroxon, dimethyl phosphorothioate, dimethyl phosphate, 3-methyl-4-nitrophenol and 3-methyl-4-nitrophenyl β-D-glucoside, and minor metabolites were desmethyl compounds and oxidative products of the 3-methyl group on the phenyl ring. Penetration rates of fenitrothion into the larvae were almost equal in the two strains, while detoxication rates and fenitroxon levels were significantly different. Fenitroxon levels were 2 to 72 times higher in the susceptible strain, while the levels of dimethyl phosphate, a hydrolysis product of fenitroxon, were from 5 to 20 times higher in the resistant strain. The results indicate that increased detoxication of fenitroxon by cleaving the P(O)-O-aryl bond is the principal mechanism of fenitrothion resistance in the resistant strain.

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