尿素系除草剤ダイムロンの土壌中での変化生成物

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  • 内山 正昭
    Department of Plant Protection, Tokyo University of Agriculture and Technology

書誌事項

タイトル別名
  • Transformation Products of the Urea Herbicide Dymron in Soils
  • 尿素系除草剤ダイムロンの土壌中での変化生成物〔英文〕
  • ニョウソケイ ジョソウザイ ダイムロン ノ ドジョウチュウ デ ノ ヘンカ セ

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説明

Soils of three different types were treated with a relatively high dosage level (30ppm) of [carbonyl-14C] labeled dymron, 1-(α, α-dimethylbenzyl)-3-(p-tolyl)urea and were incubated at 30°C under upland and flooded conditions. The evolution of 14CO2 from 14C-dymron was less than 1% of the initial radioactivity during 6 months of incubation in all cases. Evidences showed that soil microbes play an important role for the degradation of dymron. The major transformation products identified were cumylurea, p-tolylurea, 4′-hydroxymethyl derivative (compound IV) and 4′-carboxy derivative (compound V). The formation of cumylurea was the main transformation pathway of dymron in the soils under upland and flooded conditions.

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