Adak Totan, Mukherjee Irani
Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India.
ICAR- National Rice Research Institute, 753006, Cuttack, Odisha, India.
Environ Monit Assess. 2016 May;188(5):299. doi: 10.1007/s10661-016-5291-6. Epub 2016 Apr 19.
The dissipation of spinosad in/on tomato and soil was studied at Indian Agricultural Research Institute, New Delhi, under field condition. The optimized sample preparation technique using high performance liquid chromatography (HPLC) with UV detector gave the limit of quantification (LOQ) of 0.05 μg g(-1) of tomato. Spinosad residues were below the determination limit in/on tomato fruits after 15 days of application for recommended dose (51 g a.i. ha(-1)). The half-life of spinosad was in between 3.18 to 3.74 days for the recommended dose. Similarly half-life of 4.14 to 4.71 days was observed for double the recommended dose. The study also investigated the persistence of spinosad in soil and it has been found that half-life of spinosad in soil was 5.49 to 6.36 days for the recommended dose and 6.76 to 6.91 days for double the recommended dose. Based on the CODEX-MRL of spinosad (0.3 mg kg(-1)), pre-harvest interval (PHI) was 7.54 days for the recommended dose of spray.
在新德里的印度农业研究所以及田间条件下，对番茄及番茄植株上/土壤中的多杀菌素消散情况进行了研究。采用配备紫外检测器的高效液相色谱法（HPLC）的优化样品制备技术，番茄的定量限（LOQ）为0.05 μg g(-1)。按照推荐剂量（51 g a.i. ha(-1)）施用15天后，番茄果实中的多杀菌素残留量低于测定限。推荐剂量下多杀菌素的半衰期在3.18至3.74天之间。同样，推荐剂量加倍时，观察到的半衰期为4.14至4.71天。该研究还调查了多杀菌素在土壤中的残留情况，发现推荐剂量下多杀菌素在土壤中的半衰期为5.49至6.36天，推荐剂量加倍时为6.76至6.91天。根据多杀菌素的食品法典最大残留限量（0.3 mg kg(-1)），推荐喷雾剂量的收获前间隔期（PHI）为7.54天。
