生体および環境中における除草剤ベンチオカーブの挙動に関する研究

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1件

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タイトル別名
  • Studies on the Fate and Behaviors of Benthiocarb Herbicide in Biota and the Environment
  • セイタイ オヨビ カンキョウチュウ ニ オケル ジョソウザイ ベンチオカーブ

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説明

The fate and behaviors of the herbicide benthiocarb (Saturn®, S-4-chlorobenzyl N, N-diethylthiocarbamate) in mice, plants, soils and river water were studied in the laboratory and fields. 14C-Benthiocarb was absorbed from the gastrointestinary tract of mice, rapidly metabolized and excreted into the urine. The compound was absorbed through the roots and stalks of rice plants and barnyardgrass and rapidly metabolized. The degradation of benthiocarb in soil was faster under aerobic conditions than anaerobic conditions. Photochemical decomposition also occurred rapidly. The major degradation pathways were common in the different biota and under light, and occurred through deethylation, hydrolysis and oxidation. The main products, however, differed according to the biota and light. The other routes of degradation also existed. The volatilization of benthiocarb occurred rapidly from the aqueous solution, but the rate decreased markedly by existence of soil in the solution due to the rapid adsorption to the soil. The volatilization from the surface of unflooded soil was very slow. The amount of benthiocarb in surface water, soil and crop plants decreased rapidly in fields treated with the herbicide. The residual amounts in cereals, begetables and other crops were very small. Seasonal changes in benthiocarb concentration in creek and river water were also studied. The positive correlation existed between the concentration and the applied amount and term.

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