フェンバレレート (スミサイジン<sup>®</sup>) の水中および土壌表面上における光分解

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4件
  • 三上 信可
    Research Department, Pesticides Division, Sumitomo Chemical Co., Ltd.
  • 高橋 尚裕
    Research Department, Pesticides Division, Sumitomo Chemical Co., Ltd.
  • 林 久美子
    Research Department, Pesticides Division, Sumitomo Chemical Co., Ltd.
  • 宮本 純之
    Research Department, Pesticides Division, Sumitomo Chemical Co., Ltd.

書誌事項

タイトル別名
  • Photodegradation of Fenvalerate (Sumicidin<sup>®</sup>) in Water and on Soil Surface
  • フェンバレレート(スミサイジン)の水中および土壌表面上における光分解〔英文〕
  • フェンバレレート スミサイジン ノ スイチュウ オヨビ ドジョウ ヒョウメンジ

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抄録

On exposure to sunlight, fenvalerate [α-cyano-3-phenoxybenzyl-2-(4-chlorophenyl) isovalerate] was rapidly decomposed in distilled water, 2% aqueous acetone, river and sea water to almost the same extent. The half-life of fenvalerate photodegradation in each aqueous suspension ranged from ca. 4 days in summer to 13-15 days in winter, due to seasonal variation of sunlight intensity. The quantum yield was determined to be 6.8×10-3 (at 313nm in water), and the half-life of disappearance at 40 degree North Latitude was calculated to be 4.1 days and 12.4 days in summer and in winter, respectively. On soil surface, the rate of photodegradation was different depending on the soil used, with half-lives of approximately 2, 6 and 18 days in Kodaira light clay, Azuchi sandy clay loam and Katano sandy loam soils, respectively. Without sunlight, approximately 55 to 83% of the applied fenvalerate remained on these soils 20 days post-treatment. Fenvalerate was photodecomposed by oxidation, decarboxylation, hydration at CN group to CONH2, cleavage of ester or diphenyl ether linkage, hydrolysis from CONH2 to COOH. Hydrogen cyanide was also liberated in water and promptly transformed to carbon dioxide by natural sunlight. The predominant reactions were decarboxylation and cleavage of ester linkage in water, whereas hydration at CN group was dominant on soil surface. Thus, photodegradation rates and pathways for fenvalerate were somewhat dependent on the environmental conditions tested.

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