摘要
采用药膜法分别测定了10%甲维盐·茚虫威悬浮剂、12%甲维盐·虫螨腈悬浮剂、12%虫螨腈·虱螨脲悬浮剂、14%呋虫胺·螺虫乙酯悬浮剂、22%吡虫啉·螺虫乙酯悬浮剂和6%吡虫啉·高效氯氟氰菊酯悬浮剂6种复配杀虫剂对七星瓢虫Coccinella septempunctata Linnaeus幼虫急性毒性,并进行了初级风险评估。结果显示,6种药剂对七星瓢虫48 h的LR_(50)(半致死用量,Median lethal rate)分别为0.812、2.255、4.082、22.735、6.755和0.00467 g a.i/hm^(2)。在农田内暴露场景下,6种复配杀虫剂对七星瓢虫风险均不可接受;在农田外暴露场景下,仅有14%呋虫胺·螺虫乙酯悬浮剂和22%吡虫啉·螺虫乙酯悬浮剂对七星瓢虫风险可接受,其它均不可接受。结果表明在田间最大推荐用量下,6种药剂对七星瓢虫的初级风险评价均存在高风险。
The acute toxicity of six compound insecticides to the 2 rd instar larvae of Coccinella septempunctata was tested by the method of drug film in the laboratory.And the primary risk of six compound insecticides in and out of farmland was assessed respectively.The results showed that the median lethal rate(LR_(50))of 10%Emamectin benzoate·Indoxacarb SC,12%Emamectin benzoate·Chlorfenapyr SC,12%Chlorfenapyr·Lufenuron SC,14%Dinotefuran·Spirotetramat SC,22%Imidacloprid·Spirotetramat SC and 6%Imidacloprid·Lambda-Cyhalothrin SC were 0.812,2.255,4.082,22.735,6.755 and 0.00467 g a.i/hm^(2)at 48 h,respectively.The primary risk assessment results showed that the risk of six compound insecticides in farmland was unacceptable;the risk of 14%Dinotefuran·Spirotetramat SC and 22%Imidacloprid·Spirotetramat SC outside farmland was acceptable,and others was unacceptable.The results indicated that the six compound insecticides had a high risk for the primary risk assessment of C.septempunctata in the maximum recommended dosage of the farmland.
作者
陈吉祥
于伟丽
苏磊
白倩
魏成彩
陈乐乐
王广友
吴培
CHEN Ji-Xiang;YU Wei-Li;SU Lei;BAI Qian;WEI Cheng-Cai;CHEN Le-Le;WANG Guang-You;WU Pei(Shandong Academy of Pesticide Sciences,Key Laboratory of Chemical Pesticide of Shandong Province,Jinan 250000,China)
出处
《环境昆虫学报》
CSCD
北大核心
2021年第5期1265-1272,共8页
Journal of Environmental Entomology
基金
山东省农业科学院农业科技创新工程(CXGC2021A17)。
关键词
复配杀虫剂
七星瓢虫
毒力
风险评估
Compound insecticide
Coccinella septempunctata
toxicity
risk assessment
