摘要
为了评价甲维.毒死蜱40%水乳剂在稻田中使用后的残留行为及环境安全性,采用高效液相色谱-荧光检测器(HPLC-FLD)和气相色谱-电子捕获检测器(GC-ECD)分别对样品中的甲维盐、毒死蜱进行测定,并通过田间试验对该药中甲维盐和毒死蜱在水稻和稻田中的消解动态及最终残留进行研究。结果表明:甲维盐和毒死蜱在稻田水、土壤和稻秆中均消解较快,甲维盐半衰期分别为17.55、35.55、19.10h;毒死蜱半衰期分别为0.90天～1.36天、3.02天～5.30天和4.43天～5.82天。在稻田中施用甲维.毒死蜱40%水乳剂,按推荐使用剂量施药2次,距末次施药21天以上,收获的糙米中未检出甲维盐,并且其中毒死蜱的残留量也低于中国规定的毒死蜱在糙米中的最大残留限量(MRL)0.1mg/kg,此时收获的糙米食用是安全的。
This study had been carried out to investigate the residue behavior and environmental safety of 40% emamectin benzoate and chlorpyrifos EW in rice and paddy.The residues of emamectin benzoate and chlorpyrifos in samples were determined by HPLC-FLD and GC-ECD,respectively.And the field trials were conducted to reveal the dissipation and terminal residue of emamectin benzoate and chlorpyrifos in rice and paddy.The results showed that emamectin benzoate and chlorpyrifos dissipated rapidly in paddy water,soil and rice straw,and the half-lives of emamectin benzoate were 17.55,35.55,19.10h,the half-lives of chlorpyrifos were 0.90-1.36 days,3.02-5.30 days and 4.43-5.82 days,respectively.when 40%emamectin benzoate and chlorpyrifos EW was applied twice at recommended dosage in rice field,the final residues of emamectin benzoate were not detected in the rice that harvested more than 21 days after the last application,and the final residues of chlorpyrifos in the rice were below the maximum residue limit（MRL） 0.1 mg/kg of rice in China.So the rice harvested at this time was safe for human consumption.
出处
《中国农学通报》
CSCD
北大核心
2011年第30期214-221,共8页
Chinese Agricultural Science Bulletin
基金
农业部农药残留基金项目"甲维.毒死蜱40%水乳剂在水稻上的残留试验"(2009P610)
关键词
甲维盐
毒死蜱
水稻
稻田
残留
消解动态
emamectin benzoate
chlorpyrifos
rice
paddy
residue
dynamics
