Persistence, fate, and metabolism of [(14)C]metalaxyl in typical Indian soils.
The biodegradation of ring-labeled [(14)C]metalaxyl in six Indian soils was examined. The total recovery of radioactivity from soil was 100 +/- 6% of the applied radioactivity. Volatile organics and (14)CO(2) were detected at lower levels. This suggests that neither mineralization nor volatilization is a major route 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 found when half-lives were plotted against microbial biomass and soil clay content. However, soil total organic carbon did not correlate with metalaxyl persistence. Five metabolites detected by thin-layer chromatography were more polar than metalaxyl.
Sukul
P
P
Institute of Environmental Research, University of Dortmund, D-44221 Dortmund, Germany.
Spiteller
M
M
D000409:Alanine / Q000031:analogs & derivatives* / Q000032:analysis / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002247:Carbon Isotopes; D002855:Chromatography, Thin Layer; D005659:Fungicides, Industrial / Q000378:metabolism*; D007194:India; D012990:Soil Pollutants, Radioactive / Q000032:analysis / Q000378:metabolism*; D014835:Volatilization
D002247:Carbon Isotopes; D005659:Fungicides, Industrial; D012990:Soil Pollutants, Radioactive; C028175:metalaxyl; D000409:Alanine