| 张志祥1,3;程东美2;徐汉虹1,3.印楝素A和印楝素B生物活性比较[J].植物保护,2007,33(3):80-82. |
| 印楝素A和印楝素B生物活性比较 |
| A comparative study on the bioactivity of azadirachtin A and azadirachtin B |
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| DOI： |
| 中文关键词: 印楝素A 印楝素B 小菜蛾 斜纹夜蛾 棉铃虫 生物活性 |
| 英文关键词:azadirachtin A azadirachtin B Plutella xylostella Spodoptera litura Heliothis armigera bioactivity |
| 基金项目: |
| 张志祥1 3;程东美2;徐汉虹1 3 |
| 1.农药与化学生物学教育部重点实验室 广州 510642;2.仲恺农业技术学院植保系 广州 510225;3.华南农业大学昆虫毒理研究室 广州510642 |
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| 中文摘要: |
| 对印楝素A和印楝素B的生物活性进行了研究。在3μg/mL的剂量下处理后24 h,印楝素A和印楝素B对小菜蛾3龄幼虫的拒食率分别为85.3%和80.4%;在5μg/mL的剂量下处理后24 h,对棉铃虫3龄幼虫的拒食率分别为94.9%和80.2%。处理后72 h,印楝素A和印楝素B对斜纹夜蛾3龄幼虫的LC50分别为1.0μg/mL和3.3μg/mL。印楝素A和印楝素B在3μg/mL的剂量下处理后72 h,小菜蛾3龄幼虫的死亡率分别为90.42%和84.11%;在5μg/mL的剂量下处理后72 h,棉铃虫3龄幼虫的死亡率分别为99.1%和100.0%;在0.5μg/mL的剂量下处理后72 h,斜纹夜蛾4龄幼虫体重降低率分别为57.5%和72.73%;在0.8μg/mL的剂量下处理后72 h,棉铃虫3龄幼虫体重降低率分别为84.1%和80.9%。 |
| 英文摘要: |
| The bioactivity of azadirachtin A and azadirachtin B was studied in this paper.The antifeedant rates of azadirachtin A and azadirachtin B against the 3rd instar larvae of Plutella xylostella were 85.33% and 80.36%,treated at the concentration of 3 mg/mL for 24 hours,respectively,while those against the 3rd instar larvae of Heliothis armigera were 94.90% and 80.23%,treated at the concentration of 5 mg/mL for 24 hours,respectively.The LC50 of azadirachtin A and azadirachtin B against the 3rd instar larvae of Spodoptera litura were 1.03 mg/mL and 3.28 mg/mL,treated for 72 hours,respectively.The mortalities of the 3rd instar larvae of P.xylostella were 90.42% and 84.11%,respectively,when treated with azadirachtin A and azadirachtin B at the concentration of 3 mg/mL for 72 hours.The mortalities of the 3rd instar larvae of Heliothis armigera were 99.05% and 100.00%,respectively,when treated with azadirachtin A and azadirachtin B at the concentration of 5 mg/mL for 72 hours.The weight reduction rates of the 4th instar larvae of S.litura were 57.54% and 72.73%,respectively,when treated with azadirachtin A and azadirachtin B at the concentration of 0.5 μg/mL for 72 hours,while those of H.armigera were 84.09% and 80.86%,respectively,when treated with azadirachtin A and azadirachtin B at the concentration of 0.8 μg/mL for 72 hours. |
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