| 徐玉辉，董建豪，夏国益，毛根林，路 伟,,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,(): |
| 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 on the control of Spodoptera litura by toosendanin and azadirachtin |
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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 anti feeding activity |
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| 摘要点击次数: 4 |
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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，本实验采用叶片浸渍法测定茶皂素、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 on the antifeeding activity of the third-instar larvae of Spodoptera litura, this experiment used leaf immersion method to determine the antifeeding rate and synergistic ratio of tea saponin, toosendanin, azadirachtin, and tea saponin mixed with toosendanin and azadirachtin on the third-instar larvae of S. litura. Through pot efficacy trials, the antifeeding rate changes of the three single agents and mixed tea saponin + toosendanin, tea saponin + azadirachtin after smearing cabbage leaves were determined under different treatment times. The results showed that the antifeeding medium concentrations of tea saponin, toosendanin, and azadirachtin were 64.02 μg/mL, 29.90 μg/mL, and 3.98 μg/mL, respectively. The mixed tea saponin + toosendanin had synergistic effect at a ratio of 9, 1~3, 7, with a maximum synergistic ratio of 1.39 at a ratio of 5, 5, showing additive effect. The mixed tea saponin + azadirachtin had synergistic effect at a ratio of 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 and 1.21 times that of toosendanin; the highest antifeeding rate of tea saponin + azadirachtin (8, 2) was 2.47 times that of tea saponin. In summary, the results showed that the mixed tea saponin toosendanin and azadirachtin had synergistic effect on the control of S. litura by two plant-derived pesticides, which could provide scientific basis for the scientific prevention and control of Spodoptera litura and the development of environmentally friendly synergists. |
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