| 摘要: |
| 以粘虫为试虫，采用载毒叶碟法，根据不同症状指标研究了苦皮藤素Ⅳ和V的互作毒力。结果表明，苦皮藤素Ⅳ与V混用(体积比)比例在3：1～1：3时，苦皮藤素Ⅳ对苦皮藤素V的毒杀作用具有增效作用，苦皮藤素V对苦皮藤素Ⅳ的麻醉作用无明显影响。在此基础上，提出了当研究在症状学指标上有显著差异的杀虫剂间的相互作用时，应用“互作比值”的概念。 |
| 关键词: 植物杀虫剂 苦皮藤素 互作比值 |
| DOI： |
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| 基金项目:国家自然科学基金倾斜项目(39970505)；国家自然科学基金重点项目(30130130) |
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| Toxicity interaction of Celangulin Ⅳ and Ⅴ from Celastrus angulatus against Armyworm(Mythimna separata)Larvae. |
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| Abstract: |
| Celangulin Ⅳ and celangulin Ⅴ isolated from the root bark of the plant Celastrus angulatus are the major active ingredients of this botanical insecticide.The toxicity interaction of the different ratio mixture of celangulin Ⅳ and Ⅴ has been examined by means of the leaf disk method against armyworm (Mythimna separata) larvae.The bioassay results showed that the insecticidal efficacy of celangulin Ⅴ against armyworm larvae was synergied by celangulin Ⅳ,but celangulin Ⅴ has no synergistic effects on the narcotic efficacy of celangulin Ⅳ when the mixed rati（V/V）of celangulin Ⅳ and Ⅴis from 3∶1 to 1∶3.On the basis of the results,"interaction ratio" which might be used to evaluate the toxicity interaction of the mixture of several insecticides with different symptom guideline was put forward. |
| Key words: botanical insecticide celangulin interaction ratio |
