Impact of organic manures, viz., composted coir pith, press mud, sugarcane trash, and farmyard manure (FYM) on the persistence of imidacloprid in the sandy clay loam soil of tropical sugarcane crop ecosystem, was studied by employing rapid sample preparation method and reversed phase HPLC. The recoveries of the method employed to determine the residues of imidacloprid in the soil were in the range of 94.5 ± 7.02–97.3 ± 2.94% across the five levels of fortification ranged between 0.005 and 0.5 μg/g. Imidacloprid was observed to persist in the soil manured with FYM and composted coir pith for 30 days with the half-life of 7.62 and 7.0 days, respectively as against 21 days with the half-life of 6.66 days in the non-manurial soil. The comparatively longer persistence of imidacloprid in the FYM and composted coir pith-applied soils was attributed to reduced leaching from the plow layer due to the adsorption of insecticide molecules by the added organic manures.

中文翻译：

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有机肥料对吡虫啉在热带甘蔗作物生态系统沙质壤土中的持久性的影响。

通过采用快速样品制备方法研究了有机肥料，即堆肥的椰皮髓，压榨泥，甘蔗垃圾和农家肥料（FYM）对吡虫啉在热带甘蔗作物生态系统的沙质壤土中的持久性的影响，并反相HPLC。在0.005至0.5μg/ g的五个强化水平中，用于测定吡虫啉残留在土壤中的方法的回收率在94.5±7.02–97.3±2.94％的范围内。观察到吡虫啉在FYM和堆肥的堆肥中处理后的土壤中持续存在30天，半衰期分别为7.62天和7.0天，而在非粪便性土壤中则为21天，半衰期为6.66天。