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大豆科学  2015 

苍耳提取物对大豆蚜及其天敌瓢虫的影响

DOI: 10.11861/j.issn.1000-9841.2015.05.0906, PP. 906-909

Keywords: 大豆蚜,苍耳,毒杀活性,异色瓢虫

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Abstract:

为明确苍耳杀蚜活性物质的空间分布状态及其对天敌瓢虫的影响,以苍耳根、茎、叶和种子为材料,利用甲醇为有机溶剂,提取杀蚜活性物质,测定苍耳不同器官部位提取物对大豆蚜的生物活性以及对天敌瓢虫的杀伤作用。结果表明:苍耳不同部位的提取物对大豆蚜均有一定的毒杀活性,毒杀活性大小依次为叶>茎>种子>根,其中叶提取物的72h校正死亡率高达87.07%;苍耳叶提取物浓度在75mg.mL-1以下对瓢虫杀伤力较小,可以安全应用;叶和茎提取物处理盆栽中的大豆蚜5d后,对大豆蚜的校正防效可达80%以上。

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