除草剤オルベンカルブの土壌中における分解

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

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タイトル別名
  • Degradation of the Herbicide Orbencarb in Soils
  • 除草剤オルベンカルブの土壌中における分解〔英文〕
  • ジョソウザイ オルベンカルブ ノ ドジョウチュウ ニ オケル ブンカイ エイ

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The degradation of 14C-orbencarb [S-(2-chlorobenzyl-ring-U-14C) N, N-diethylthiocarbamate], a herbicide for controlling weeds in upland crops, was studied under various soil conditions. Orbencarb was more rapidly degraded under upland conditions, than under flooded conditions. The degradation was retarded in sterile soils. Under upland conditions, 14CO2 evolved rapidly in soil, where the half-lives of orbencarb were 18 to 26 days. Orbencarb sulfoxide, monodesethyl-orbencarb, methyl 2-chlorobenzylsulfoxide, methyl 2-chlorobenzylsulfone and 2-chlorobenzylsulfonic acid were identified as orbencarb's major degradation products and N-ethyl-N-vinyl-orbencarb, N-ethyl-N-β-hydroxyethyl-orbencarb, 4-hydroxyorbencarb, 5-hydroxy-orbencarb, didesethyl-orbencarb, 2-chlorobenzyl alcohol, 2-chlorobenzoic acid and methyl 2-chlorobenzylsulfide as its minor. Soil bound residues derived from its 14C-U-benzene ring were found in humic acid, hulvic acid and humin fractions, and its benzene ring was finally degraded to 14CO2.

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