【摘要】 氯溴虫腈,试验代号HNPC-A3061,化学名称为1-(2-氯乙氧)甲基-4-溴-2-(4-氯苯基)-5-三氟甲基吡咯-3-腈,是我国自主研制的一种新型吡咯类杀虫剂,主要用于防治蔬菜、水稻和棉花害虫。通过两年三地田间试验,研究了氯溴虫腈在甘蓝和土壤中的残留与消解动态。结果表明:2012年氯溴虫腈在湖南、河北和江苏三个试验点甘蓝上的消解半衰期分别为5.28、5.14、6.16 d,土壤中的消解半衰期分别为13.05、7.87、11.12 d;2013年甘蓝上的消解半衰期分别为7.17、6.42、10.73 d,土壤中的消解半衰期分别为2.75、2.32、5.94 d。根据我国农药残留等级标准,氯溴虫腈属于易降解农药。以10%氯溴虫腈悬浮剂的有效成分施药剂量18 g a.i.·hm-2和27 g a.i.·hm-2各喷施3～4次,距最后一次施药14 d,氯溴虫腈在甘蓝和土壤中的最大残留量分别为0.290 mg·kg-1和0.141mg·kg-1,建议氯溴虫腈在甘蓝上的最大允许残留限量为1.0 mg·kg-1,安全间隔期为14 d。更多还原

【Abstract】 Brochlorfenapyr, test code:HNPC-A3061; chemical name:1-(2-chloroethoxy)methyl-4-brom-2-(4-chlorophenyl)-5-tirfluoromethylpyrrol-3-nitrile), is a novel pyrrole insecticide discovered by Hunan Research Institute of Chemical Industry, and is used to control pest insects on crops such as vegetables, rice and cotton. Field experiments were conducted to study the residues and dissipation dynamics of HNPC-A3061 in Chinese cabbages, and soils in Hunan, Hebei and Jiangsu for two years. The initial deposition of HNPC-A3061 on Chinese cabbages was 2.686 mg·kg-1, 1.715 mg·kg-1and 2.603 mg·kg-1in 2012, and 4.859 mg·kg-1, 2.665 mg·kg-1and 1.755 mg·kg-1in 2013 for Hunan, Hebei and Jiangsu, respectively. The half life of HNPC-A3061 on Chinese cabbages was 5.28 d, 5.14 d and 6.16 d in 2012, and 7.17 d, 6.42 d and 10.73 d in 2013 for Hunan, Hebei and Jiangsu, respectively. The initial amounts of HNPC-A3061 deposited on soils were 1.284 mg·kg-1, 0.451 mg·kg-1and 0.298 mg·kg-1in 2012, and 0.705 mg·kg-1, 0.691 mg·kg-1and 0.648 mg·kg-1in 2013 for Hunan, Hebei and Jiangsu, respectively. In soils, HNPC-A3061 had a half life of 13.05 d, 7.87 d and 11.12 d in 2012, and 2.75 d, 2.32 d and 5.94 d in 2013 for Hunan, Hebei and Jiangsu, respectively. Based on the classification of pesticide residues of China, HNPC-A3061 was a low toxic and non-persistent pesticide. When spaying 3～4 times with the recommended dosages of 18 g a.i.·hm-2and 27 g a.i.·hm-2, the final maximum residue levels(MRL)of HNPC-A3061 in Chinese cabbages and soils were 0.290 mg·kg-1and 0.141 mg·kg-1at 14 d after the last application, respectively. These values were lower than the standard of 1.0 mg·kg-1with pre-harvest interval of 14 d established by US EPA for the same class insecticide chlorfenapyr in Chinese cabbages.更多还原