| 裴秀芹1, 2, 刘慧平1*, 赵飞2, 3, 张薇2, 马春森2*.低温预处理麦长管蚜对吡虫啉致死效应的影响[J].植物保护,2015,41(2):44-48. |
| 低温预处理麦长管蚜对吡虫啉致死效应的影响 |
| The influence of low temperature pretreatment on the lethal effect of imidacloprid to Sitobion miscanthi |
| 投稿时间：2014-02-25 修订日期：2014-04-15 |
| DOI： |
| 中文关键词: 吡虫啉 温度 麦长管蚜 死亡率 毒力 |
| 英文关键词:imidacloprid temperature Sitobion miscanthis mortality toxicity |
| 基金项目:国家自然科学基金(31170393, 31272035); 北京市自然科学基金(6132029) |
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| 中文摘要: |
| 为了明确低温预处理对吡虫啉致死效应的影响, 室内选择麦长管蚜作为研究对象, 采用滤纸接触法首先试验了5 ℃低温预处理是否对吡虫啉毒力有影响, 随后研究了5 ℃预处理时间(1、2、3、4 h)和5、10 ℃下预处理后用药的间隔时间(1、3、5 h)对吡虫啉致死效应的影响。结果表明, 5 ℃预处理2 h可显著降低吡虫啉的毒力, 这种负效应随着低温处理时间的增加而增强, 但随低温处理后用药间隔时间的增加而减弱, 不同低温对吡虫啉致死效应影响不显著。本研究结论为科学用药提供了理论依据。 |
| 英文摘要: |
| In order to clarify whether low temperature pretreatment affects lethal effect of pesticides, we exposed a species of cereal aphids (Sitobion miscanthis) under 5 ℃ for 2 hours and then tested the toxicity of imidacloprid to those pretreated aphids in laboratory with the method of contact filter paper. We further tested toxicity of imidacloprid after exposing aphids at 5 ℃ for different time periods i.e. 1, 2, 3 and 4 hours, respectively. At last, we tested mortality of aphids which treated with imidacloprid after exposing those aphids at 5 ℃ and 10 ℃ respectively for 2 hours, then at room temperature for different interval times (0 , 1 , 3 and 5 hours), respectively. Our results indicated that cold treatment at 5 ℃ could reduce the toxicity of imidacloprid significantly. The toxicity of imidacloprid was inhibited as aphids' cold exposure increased. However, the inhibition effect on toxicity of imidacloprid declined with interval time became longer. The effect of different low temperatures on the toxicity was not significant. |
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