3种杀虫剂对草地贪夜蛾卵和幼虫的室内毒力评价  

Toxicities of three insecticides against eggs and larvaes of the fall armyworm,Spodoptera frugiperda

作　　者：宋琳琳 朱凤 孔维宝 张银贵 张蕾[1] 程云霞[1] 江幸福[1] SONG Linlin;ZHU Feng;KONG Weibao;ZHANG Yingui;ZHANG Lei;CHENG Yunxia;JIANG Xingfu(State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection,Chinese Academy of Agricultural Sciences,Beijing 100193,China;Jiangsu Plant Protection Plant Quarantine Station,Nanjing 210036,China;Jiangsu Bangsheng Biotechnology Co.,Ltd.,Huaian 223001,China;Plant Protection and Plant Inspection Station of Jiangyan District,Taizhou 225529,Jiangsu,China)

机构地区：[1]植物病虫害生物学国家重点实验室,中国农业科学院植物保护研究所,北京100193 [2]江苏省植物保护植物检疫站,南京210036 [3]江苏邦盛生物科技有限责任公司,淮安223001 [4]江苏省泰州市姜堰区植保植检站,姜堰225529

出　　处：《世界农药》2021年第8期41-45,共5页World Pesticide

基　　金：国家重点研发计划(2019YFD0300101);中国农业科学院草地贪夜蛾联合攻关重大科技任务(CAAS-ZDRW202007);国家绿肥产业技术体系(CARS-22);国家自然科学基金(32072420)。

摘　　要：为筛选出能有效控制草地贪夜蛾的杀虫剂,并为生产中合理使用杀虫剂提供指导。在室内采用浸卵法和浸叶法分别评价了目前生产上防治水稻害虫常用的2种复配杀虫剂和1种生物农药对草地贪夜蛾卵和幼虫的毒力。结果表明,10%甲维·甲虫肼SC质量浓度为1.33 mg/L时对草地贪夜蛾卵和幼虫均具有较好的毒杀效果,药后72 h平均卵校正孵化抑制率为(69.74±7.56)%,并随着浓度的增加而升高,其中药后24 h对2龄幼虫校正死亡率达100%;26%甲氧·茚虫威SC质量浓度为0.68 mg/L时药后72 h幼虫校正死亡率达100%,但对卵的孵化抑制率较低;10%多杀霉素SC质量浓度为0.33 mg/L时药后48 h校正卵孵化抑制率达(87.18±1.48)%,幼虫校正死亡率达(97.44±1.48)%,并随浓度的增加而升高。这说明10%甲维·甲虫肼SC和10%多杀霉素SC对卵孵化有较好的抑制作用,而3种杀虫剂对幼虫均有较好的杀虫活性,适用于生产实际中草地贪夜蛾的防治。In order to screen out the insecticides which can effectively control the fall armyworm,Spodoptera frugiperda,and provide guidance for rational use of insecticides in production,this paper evaluated the control effect of two compound insecticides and one biological insecticide on the eggs and larvae of S.frugiperda in the laboratory.The results showed that emamectin benzoate·methoxyfenozide 10%SC had a good control effect on both the eggs and larvaes when the mass concentration of the insecticide was 1.33 mg/L.The corrected average hatching inhibition rate was(69.74±7.56)%72 h after treatment and increased with the insecticide concentration increase.The corrected mortality rate of 2 instar larvae reached 100%24 h after treatment.The corrected larval mortality reached 100%72 h after treatment,but the corrected hatching inhibition rate was low,when methoxyfenozide·indoxacarb 26%SC was 0.68 mg/L.The corrected hatching rate and larval mortality were(87.18±1.48)%and(97.44±1.48)%respectively 48 h after treatment when spinosad 10%SC was 0.33 mg/L,and increased with the concentration increase.The three insecticides had obvious control effects on larvaes in which emamectin benzoate·methoxyfenozide 10%SC and spinosad 10%SC had significant inhibitory effects on egg hatching,providing a technical reference for pesticide management of the insect in the field.

关 键 词：草地贪夜蛾 杀虫剂 防治效果 

分 类 号：TQ450.2[化学工程—农药化工]