Division of Agricultural Chemicals, Indian Agricultural Research Institute, New Delhi, India, 110012,
Environ Monit Assess. 2014 May;186(5):3213-9. doi: 10.1007/s10661-013-3611-7. Epub 2014 Jan 14.
Degradation of flubendiamide as affected by microbial population count in two Indian soils (red and alluvial) varying in physicochemical properties was studied under sterile and non-sterile conditions. Recovery of flubendiamide in soil was in the range of 94.7-95.9 % at 0.5 and 1.0 μg g(-1), respectively. The DT50 of flubendiamide at the level of 10 μg g(-1) in red soil under sterile and non-sterile conditions was found to be 140.3 and 93.7 days, respectively, and in alluvial soil under sterile and non-sterile condition was 181.1 and 158.4 days, respectively. Residues of flubendiamide dissipated faster in red soil (non-sterile followed by sterile) as compared to alluvial (non-sterile soil followed by sterile soil). A wide difference in half-life of red and alluvial soil under sterile and non-sterile conditions indicated that the variation in physicochemical properties of red and alluvial soil as well as the presence of microbes play a great role for degradation of flubendiamide. The results revealed that slower-degrading alluvial soil possessed microbes with degradative capacity. The degradation rate in this soil was significantly reduced by some of its physicochemical characteristics, despite sterile and non-sterile conditions, which was faster in red soil.
在无菌和非无菌条件下，研究了两种印度土壤（红壤和冲积土）中微生物种群数量对氟苯虫酰胺降解的影响，这两种土壤的理化性质不同。在 0.5 和 1.0 μg g(-1) 时，土壤中氟苯虫酰胺的回收率分别在 94.7-95.9%范围内。在无菌和非无菌条件下，红壤中氟苯虫酰胺在 10 μg g(-1) 水平下的 DT50 分别为 140.3 和 93.7 天，冲积土中分别为 181.1 和 158.4 天。与冲积土（无菌土壤后是无菌土壤）相比，红土（无菌土壤后是无菌土壤）中氟苯虫酰胺的残留更快地消散。无菌和非无菌条件下红土和冲积土半衰期的巨大差异表明，红土和冲积土的理化性质的变化以及微生物的存在对氟苯虫酰胺的降解起着重要作用。结果表明，降解速度较慢的冲积土具有降解能力的微生物。尽管在无菌和非无菌条件下，该土壤的某些理化特性会显著降低其降解速率，但在红土中，降解速率更快。
