| 摘要: |
| 普通大蓟马Megalurothrips usitatus 是冬季海南豇豆Vigna unguiculata 的主要害虫，每年均对豇豆生产造成严重危害。为了挖掘防治蓟马的药剂，以普通大蓟马2 龄若虫和成虫为靶标，采用药膜法测试三叶鱼藤Derris trifoliate 提取物对靶标害虫的触杀活性。结果表明，三叶鱼藤乙酸乙酯相对普通大蓟马2 龄若虫和成虫显示较好的触杀活性，与对照药剂鱼藤酮无显著性差异；乙酸乙酯相24 h 对蓟马2 龄若虫的触杀活性为92.22%，EC50 值为1.158 mg/mL。由此表明三叶鱼藤乙酸乙酯相有较好的活性，为蓟马防治和三叶鱼藤利用提供了新途径。 |
| 关键词: 三叶鱼藤 鱼藤酮 普通大蓟马 触杀活性 |
| DOI： |
| 分类号: |
| 基金项目:海南省重点研发计划项目（ZDYF2019056） |
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| Preliminary Study on Insecticidal Activity of Derris trifoliate Extract against Megalurothrips usitatus |
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Huang Danmin, Shi Danni, Li dunxi, Tian Mi, Guo Xia
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Hainan Academy of Forestry，Haikou, Hainan 571100, China
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| Abstract: |
| Megalurothrips usitatus is the main pest of Vigna unguiculata in winter in hainan and causes serious damage every year. In order to finding the control agents for Megalurothrips usitatus, in this paper, the contact activities of Derris trifoliate extracts were tested against 2-instar nymphs and adults of Megalurothrips usitatus using film method. The results showed that the ethyl acetate extract of Derris trifoliate exhibited excellent contact activity against the 2-instar nymphs and adults, and there was no significant difference with the control rotenone. The contact activity of ethyl acetate extract against the 2-instar nymph was 92.22% and the EC50 value was 1.158 mg/mL at 24 h. Thus, this study indicated that the ethyl acetate phase of D. trifoliate had better activity and provided a new way for the control of thrips and utilization of D. trifoliate. |
| Key words: Derris trifoliate rotenone Megalurothrips usitatus contact activity |
