多杀霉素对草地贪夜蛾幼虫的室内毒力及田间防控效果  

Determination of indoor toxicity and field control effect of spinosad against Spodoptera frugiperda

作　　者：罗茜艳 尹艳琼[2] 吴成伟[3] 肖竣文 金灿 刘莹 李向永[2] 赵雪晴[2] 谌爱东[2] Luo Xiyan;Yin Yanqiong;Wuu Chengwei;Xiao Junwen;Jin Can;Liu Ying;Li Xiangyong;Zhao Xueqing;Chen Aidong(Resource Plant Research Institute,Yunnan University,Kunming 650504,China;Key Laboratory of Green Prevention and Control of Agricultural Transboundary Pests of Yunnan Province/Agricultural Environment and Resource Research Institute,Yunan Academy of Agricultural Sciences;Jiangsu Kesheng Group Co.,Ltd.)

机构地区：[1]云南大学资源植物研究院,云南昆明650504 [2]云南省农业科学院农业环境资源研究所/云南省农业跨境有害生物绿色防控重点实验室 [3]江苏克胜集团股份有限公司

出　　处：《植物检疫》2023年第3期39-43,共5页Plant Quarantine

基　　金：云南省重大科技专项(202102AE090003);云南省创新团队(202005AE160003);云南省重点基金(202201AS070067)。

摘　　要：为明确多杀霉素对草地贪夜蛾的作用效果,开展了室内毒力测定和田间药效评价,为多杀霉素用于草地贪夜蛾防治提供参考依据。室内毒力测定结果表明,多杀霉素对草地贪夜蛾有较高的毒性,对低龄幼虫的毒力高于高龄幼虫,2~5龄草地贪夜蛾LD_(50)分别为0.87、3.76、5.54、10.28 mg/L,加入20%多杀霉素增效剂未表现出对3龄幼虫的增效作用。田间试验结果表明,多杀霉素对草地贪夜蛾防效良好,20%多杀霉素悬浮剂5000倍液、8000倍液、12000倍液药后10 d的防效分别为91.98%、67.33%、54.43%。基于经济阈值的害虫防治简易判别规则分析经济效益表明,防治玉米苗期的草地贪夜蛾,以20%多杀霉素悬浮剂5000倍液为最佳选择。In order to clarify the effect of spinosad on Spodoptera frugiperda,the indoor toxicity test and field efficacy evaluation were carried out to provide a reference basis for the use of spinosad in the control of S.frugiperda.The results of indoor toxicity test showed that spinosad had high toxicity to S.frugiperda,and the toxicity to the lower instar larvae was higher than that of the older instar larvae.The LD50of the 2nd to 5th instar S.frugiperda was 0.87,3.76,5.54 and 10.28 mg/L,respectively.Adding a synergist to 20%spinosad SC did not show any synergistic effect on the 3rd instar larvae.The results of field experiment showed that spinosad had good control effect on S.frugiperda,the control effects of SC5000 times solution,8000 times solution and 12000 times solution 10 days after treatment were 91.98%,67.33%and 54.43%,respectively.The economic benefit was analyzed by the simple discriminant rule of pest control based on economic threshold.The results showed that 20%spinosad SC 5000 times solution was the best choice to controlling S.frugiperda at maize seedling stage.

关 键 词：多杀霉素 草地贪夜蛾 室内毒力测定 防治效果 经济效益评价 

分 类 号：S433[农业科学—农业昆虫与害虫防治]