| 徐玉辉，董建豪，夏国益，毛根林，路伟,2025,茶皂素混配川楝素和印楝素对斜纹夜蛾拒食活性的增效作用[J].环境昆虫学报,(5):1670-1678 |
| 茶皂素混配川楝素和印楝素对斜纹夜蛾拒食活性的增效作用 |
| Synergistic effect of tea saponin combined with toosendanin and azadirachtin on the antifeeding activity against Spodoptera litura |
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| DOI： |
| 中文关键词: 茶皂素 印楝素 川楝素 斜纹夜蛾 拒食活性 |
| 英文关键词:Tea saponins azadirachtin toosendanin Spodoptera litura antifeeding activity |
| 基金项目:国家自然科学基金青年基金（32102225）；新疆维吾尔自治区重点研发专项（2022B02033-1）；新疆维吾尔自治区“天山英才”三农骨干人才计划（2023SNGGGCC032）；新疆农业大学大学生创新创业项目（dxscx2023002） |
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| 中文摘要: |
| 为了研究茶皂素混配川楝素和印楝素2种植物源杀虫剂对斜纹夜蛾Spodoptera litura拒食活性的增效作用，本试验采用叶片浸渍法测定了茶皂素、川楝素、印楝素以及茶皂素+川楝素和茶皂素+印楝素混配对斜纹夜蛾3龄幼虫的拒食率以及增效比。通过盆栽药效试验测定3种单剂及混配的茶皂素+川楝素、茶皂素+印楝素涂抹菜心叶片后，不同处理时间下斜纹夜蛾的拒食率变化。结果表明：茶皂素、川楝素、印楝素的拒食中浓度分别为64.02 μg/mL、29.90 μg/mL、3.98 μg/mL。茶皂素+川楝素在9∶1~3∶7的配比具有增效作用，配比为5∶5时为最大增效比1.39，表现为相加作用；茶皂素+印楝素配比在9∶1~1∶9均具有增效作用，配比为8∶2时增效比最大为1.87，表现为增效作用。茶皂素+川楝素（5∶5）的最高拒食率是茶皂素的2.05倍，川楝素的1.21倍；茶皂素+印楝素（8∶2）的最高拒食率是茶皂素的2.47倍。综上结果表明：茶皂素混配川楝素和印楝素后对两种植物源农药防治斜纹夜蛾具有增效作用，可为科学防控斜纹夜蛾、开发环境友好型增效剂提供科学依据。 |
| 英文摘要: |
| In order to study the synergistic effect of tea saponin mixed with toosendanin and azadirachtin (two plant-derived insecticides) on the antifeeding activity against Spodoptera litura, this experiment used leaf immersion method to determine the antifeeding rate and synergistic ratio of tea saponin, toosendanin, azadirachtin, and their combinations (tea saponin + toosendanin and tea saponin + azadirachtin) against third-instar larvae of S. litura. Through pot efficacy trials, the antifeeding rate changes of S. litura were determined under different treatment times after smearing the three single agents and the combinations (tea saponin + toosendanin, tea saponin + azadirachtin) to Chinese cabbage leaves. The results showed that the medium antifeeding concentrations of tea saponin, toosendanin, and azadirachtin were 64.02 μg/mL, 29.90 μg/mL, and 3.98 μg/mL, respectively. The combination of tea saponin and toosendanin exhibited synergistic effect at ratios ranging from 9∶1~3∶7, with a maximum synergistic ratio of 1.39 at a ratio of 5∶5, showing additive effect. The combination of tea saponin and azadirachtin showed synergistic effect at ratios ranging from 9∶1~1∶9, with a maximum synergistic ratio of 1.87 at a ratio of 8∶2, showing synergistic effect. The highest antifeeding rate of tea saponin + toosendanin (5∶5) was 2.05 times that of tea saponin alone and 1.21 times that of toosendanin alone; the highest antifeeding rate of tea saponin + azadirachtin (8∶2) was 2.47 times that of tea saponin alone. In summary, the results showed that tea saponin mixed with toosendanin and azadirachtin had synergistic effect on the control of S. litura by the two plant-derived pesticides, providing scientific basis for the scientific prevention and control of S. litura and the development of environmentally friendly synergists. |
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