新农药氯溴虫腈在甘蓝和土壤中的残留及持久性  被引量:1

Residues and Persistence of Novel Insecticide HNPC-A3061 in Chinese Cabbages and Soils

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作  者:阳承虎 欧晓明[1,3,4] 刘红玉[1,2] 梁骥[3,4] 付启明[3,4] 任竞[3,4] 聂思桥[3,4] 

机构地区:[1]湖南大学环境科学与工程学院,长沙410082 [2]环境生物与控制教育部重点实验室(湖南大学),长沙410082 [3]湖南化工研究院国家农药创制工程技术研究中心,长沙410007 [4]农用化学品湖南省重点实验室,长沙410007

出  处:《农业环境科学学报》2014年第5期875-881,共7页Journal of Agro-Environment Science

基  金:十二五国家科技支撑计划课题(2011BAE06B01)

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。Broehlorfenapyr, test code : HNPC-A3061; chemical name: 1-(2-chloroethoxy )methyl-4-brom -2- (4-chlorophenyl)-5-tifflu- oromethylpyrrol-3-nitrile ), is a novel pyrrole insecticide discovered by Hunan Research Institute of Chemical Industry, and is used to con- trol 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-1 and 2.603 mg· kg-1 in 2012, and 4.859 mg· kg-1, 2.665 mg· kg-1 and 1.755 mg. kg-1 in 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-1 and 0.298 mg·kg-1 in 2012, and 0.705 mg·kg-1, 0.691 mg·kg-1 and 0.648 mg·kg-1 in 2013 for Hunan, Hebei and Jiangsu, respectively. In soils, HNPC-A306I 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-2 and 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-1 and 0.141 mg·kg-1 at 14 d after the last application, respectively. These values were lower than the standard of 1.0 mg· kg-1 with pre-harvest interval of 14 d established by US EPA for the same class insecticide chlorfenapyr in Chinese cabbages.

关 键 词:氯溴虫腈 甘蓝 土壤 消解动态 最终残留 

分 类 号:TQ450.2[化学工程—农药化工]

 

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