Persistence, Fate, and Metabolism of [14C]Metalaxyl in Typical Indian Soils

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• 作者：Premasis Sukul and Michael Spiteller
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2001
• 出版时间：May 2001
• 年：2001
• 卷：49
• 期：5
• 页码：2352 - 2358
• 全文大小：74K
• 年卷期：v.49,no.5(May 2001)
• ISSN：1520-5118

文摘

The biodegradation of ring-labeled [¹⁴C]metalaxyl in six Indian soils was examined. The total recoveryof radioactivity from soil was 100 ± 6% of the applied radioactivity. Volatile organics and ¹⁴CO₂were detected at lower levels. This suggests that neither mineralization nor volatilization is a majorroute of metalaxyl dissipation. The most rapid degradation of metalaxyl was observed in Bannimantap soil, in which the half-life of metalaxyl was 36 days. An inverse relationship was foundwhen half-lives were plotted against microbial biomass and soil clay content. However, soil totalorganic carbon did not correlate with metalaxyl persistence. Five metabolites detected by thin-layer chromatography were more polar than metalaxyl.Keywords: Metalaxyl; degradation; metabolism; distribution; soil