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摘要 世界重大迁飞害虫草地贪夜蛾已在中国中南部地区发生为害，对中国农作物生产构成了严重威胁。目前，生产上主要依赖化学农药控制其种群发展，这很可能导致草地贪夜蛾产生抗药性并对农业生态系统造成负面影响。为了减少化学农药的用量，我们在室内测试了10种常用抗生素、微生物和植物源生物农药对草地贪夜蛾的防治效果。结果表明，各种生物农药对草地贪夜蛾的杀卵活性均低于25%，但对幼虫有不同程度的控制作用。用药5 d后，抗生素类杀虫剂25 g/L多杀霉素ME、10%多杀霉素WG和1.5%阿维菌素UL对2龄幼虫的校正防效分别为82.67%、76.00%和54.67%;微生物杀虫剂80亿孢子/g球孢白僵菌OF和8 000 IU/μL苏云金杆菌SC对2龄幼虫的校正死亡率为60%～71.62%;植物源生物农药0.3%苦参碱AS、0.3%印楝素EC和6%鱼藤酮ME对2龄幼虫防效较差，校正死亡率均低于42%。结果表明，多杀霉素、阿维菌素、苏云金芽孢杆菌与球孢白僵菌可用于防治田间草地贪夜蛾。
关键词 草地贪夜蛾; 生物农药; 防治效果
中图分类号： S 435.132
文献标识码： BDOI： 10.16688/j.zwbh.2019240
Abstract The fall armyworm， Spodoptera frugiperda （J. E. Smith， 1797） is an important migratory pest for crop production worldwide. It has been recently recorded in southern and central China in early May 2019 and produced a great threat to crop production. Nowadays， chemical insecticides are widely used to manage its population development， which would lead to insecticides resistance of pest insects and adverse effect on agricultural ecosystem. To reduce the use of chemical insecticides， the experiment was carried out to assess the efficacy of 10 commonly used biopesticides e.g. antibiotic， microbial and botanical extracts to control S. frugiperda. Our results showed that all examined biopesticides did not inhibit the hatch of eggs well， while their control efficacies on larvae were quite different. The antibiotic biopesticides spinosad 25 g/L ME， spinosad 10% WG and abamectin 1.5% UL， caused a high mortality of 82.67%， 76.00% and 54.67%， respectively， to the 2nd instar larvae， while the microbial biopesticides Beauveria bassiana 8 billion spores/g OF and Bacillus thuringiensis 8 000 IU/μL SC caused a mortality of 60%-71.62%. However， the botanical biopesticides matrine 0.3% AS， azadirachtin 0.3% EC and rotenone 6% ME caused a much lower mortalities （
关键词 草地贪夜蛾; 生物农药; 防治效果
中图分类号： S 435.132
文献标识码： BDOI： 10.16688/j.zwbh.2019240
Abstract The fall armyworm， Spodoptera frugiperda （J. E. Smith， 1797） is an important migratory pest for crop production worldwide. It has been recently recorded in southern and central China in early May 2019 and produced a great threat to crop production. Nowadays， chemical insecticides are widely used to manage its population development， which would lead to insecticides resistance of pest insects and adverse effect on agricultural ecosystem. To reduce the use of chemical insecticides， the experiment was carried out to assess the efficacy of 10 commonly used biopesticides e.g. antibiotic， microbial and botanical extracts to control S. frugiperda. Our results showed that all examined biopesticides did not inhibit the hatch of eggs well， while their control efficacies on larvae were quite different. The antibiotic biopesticides spinosad 25 g/L ME， spinosad 10% WG and abamectin 1.5% UL， caused a high mortality of 82.67%， 76.00% and 54.67%， respectively， to the 2nd instar larvae， while the microbial biopesticides Beauveria bassiana 8 billion spores/g OF and Bacillus thuringiensis 8 000 IU/μL SC caused a mortality of 60%-71.62%. However， the botanical biopesticides matrine 0.3% AS， azadirachtin 0.3% EC and rotenone 6% ME caused a much lower mortalities （