| 印楝素对草地贪夜蛾的毒力测定及田间防效 |
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| 引用本文： | 林素坤,刘凯鸿,王瑞飞,刘本菊,张悦,吴吉英子,程东美,徐汉虹,张志祥.印楝素对草地贪夜蛾的毒力测定及田间防效[J].华南农业大学学报,2020,41(1):22-27. |
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| 作者姓名： | 林素坤 刘凯鸿 王瑞飞 刘本菊 张悦 吴吉英子 程东美 徐汉虹 张志祥 |
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| 作者单位： | 天然农药与化学生物学教育部重点实验室/华南农业大学农学院,广东广州510642;仲恺农业工程学院农业与生物学院,广东广州510225 |
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| 基金项目： | 广东省现代农业产业技术体系创新团队建设项目（2019KJ122） |
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| 摘 要： | 【目的】评价印楝素对草地贪夜蛾Spodoptera frugiperda的毒力与防效,为草地贪夜蛾的防治提供技术参考。【方法】采用浸叶法与喷雾法测定了印楝素对草地贪夜蛾的室内毒力和田间防治效果。【结果】在室内条件下,0.3%(φ)印楝素乳油处理草地贪夜蛾7 d后,2龄和3龄幼虫的LC50值分别为0.59和0.46 mg/L;40%(w)印楝素干粉处理草地贪夜蛾7 d后,2龄和3龄幼虫的LC_(50)值分别为0.93和0.79 mg/L。0.3%印楝素乳油处理草地贪夜蛾3 d后,2龄和3龄幼虫的AFC50值分别为0.30和0.12 mg/L;40%印楝素干粉处理草地贪夜蛾3 d后,2龄和3龄幼虫的AFC50值分别为0.53和0.30 mg/L。0.3%印楝素乳油稀释500倍喷雾处理后1、3和7 d对草地贪夜蛾的防效分别达到了24.83%、50.34%和75.50%。【结论】印楝素对草地贪夜蛾具有较好的毒杀活性与拒食活性,7 d后的防治效果较好;印楝素对草地贪夜蛾的防治具有广阔的应用前景。
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| 关 键 词： | 印楝素 草地贪夜蛾 幼虫 室内毒力 田间防效 |
| 收稿时间： | 2019/8/8 0:00:00 |
Indoor toxicity of azadirachtin to Spodoptera frugiperda and its control effect in field |
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| LIN Sukun,LIU Kaihong,WANG Ruifei,LIU Benju,ZHANG Yue,WU Jiyingzi,CHENG Dongmei,XU Hanhong and ZHANG Zhixiang.Indoor toxicity of azadirachtin to Spodoptera frugiperda and its control effect in field[J].Journal of South China Agricultural University,2020,41(1):22-27. |
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| Authors: | LIN Sukun LIU Kaihong WANG Ruifei LIU Benju ZHANG Yue WU Jiyingzi CHENG Dongmei XU Hanhong and ZHANG Zhixiang |
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| Institution: | Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education/College of Agriculture, South China Agricultural University, Guangzhou 510642, China,College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China,Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education/College of Agriculture, South China Agricultural University, Guangzhou 510642, China,Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education/College of Agriculture, South China Agricultural University, Guangzhou 510642, China,Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education/College of Agriculture, South China Agricultural University, Guangzhou 510642, China,Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education/College of Agriculture, South China Agricultural University, Guangzhou 510642, China,College of Agriculture and Biology, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China,Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education/College of Agriculture, South China Agricultural University, Guangzhou 510642, China and Key Laboratory of Natural Pesticide and Chemical Biology, Ministry of Education/College of Agriculture, South China Agricultural University, Guangzhou 510642, China |
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| Abstract: | Objective To evaluate the toxicity and control effect of azadirachtin to Spodoptera frugiperda and provide a technical reference for prevention and control of Spodoptera frugiperda.Method The toxicity and field control effect of azadirachtin on Spodoptera frugiperda were determined by soaking leaf method and spraying method.Result Under indoor condition, the LC50 values of 2nd and 3rd instar larvae were 0.59 and 0.46 mg/L respectively, when treated with 0.3% azadirachtin EC after seven days; At seven days after treated with 40% azadirachtin dry powder, the LC50 values of 2nd and 3rd instar larvae were 0.93 and 0.79 mg/L respectively; At three days after treated with 0.3% azadirachtin EC, the AFC50 values of 2nd and 3rd instar larvae were 0.30 and 0.12 mg/L respectively; At three days after treated with 40% azadirachtin dry powder, the AFC50 values of 2nd and 3rd instar larvae were 0.53 and 0.30 mg/L respectively. When 0.3% azadirachtin EC was diluted 500 times and sprayed on corn, the control effects on S. frugiperda reached 24.83%, 50.34% and 75.50% after 1, 3 and 7 days respectively.Conclusion Azadirachtin has good toxicity and antifeedant activity, and the control effect on S. frugiperda is better at seven days after treatment. Azadirachtin has a broad application prospect in controlling S. frugiperda. |
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| Keywords: | azadirachtin Spodoptera frugiperda larva indoor toxicity field efficacy |
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