傅建炜;史梦竹;李建宇;肖玉军;郑丽祯;郭建英;

• 1:福建省农业科学院植物保护研究所
• 2:中国农业科学院植物保护研究所植物病虫害生物学国家重点实验室
• 3:河北科技师范学院生命科技学院

摘要(Abstract)：

为探究除草剂在防治喜旱莲子草(Alternanthera philoxeroides)的过程中对其天敌昆虫的影响,采用不同浓度的2,4-D二甲胺盐浸叶处理的喜旱莲子草饲喂莲草直胸跳甲,连续饲喂7d后,考察了莲草直胸跳甲的繁殖、存活和发育情况。结果表明,2,4-D二甲胺盐可显著降低莲草直胸跳甲成虫的取食量,且抑制作用随药剂浓度升高和取食时间延长而显著增强;较高浓度(1.72～3.44g·L~(-1))的2,4-D二甲胺盐还会导致莲草直胸跳甲雌成虫存活率和产卵量的明显降低,卵孵化率、幼虫存活率和蛹羽化率也显著降低。可见,高浓度(1.72～3.44g·L~(-1))的2,4-D二甲胺盐对莲草直胸跳甲的生长发育和繁殖有显著不利影响,在防治喜旱莲子草时,应将2,4-D二甲胺盐的施用浓度控制在0.22～0.86g·L~(-1)内。

关键词(KeyWords)： 喜旱莲子草;莲草直胸跳甲;2,4-D二甲胺盐;取食量;存活率;产卵量

Abstract:

Keywords:

基金项目(Foundation): 国家“973”项目(2009CB119206);; 国家“十一五”科技支撑计划项目(2006BAD08A18);; 福建省农业科学院青年基金项目(2009QA-2)

作者(Author): 傅建炜;史梦竹;李建宇;肖玉军;郑丽祯;郭建英;

Email:

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