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OALib Journal期刊
ISSN: 2333-9721
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4种植物源杀虫剂对亚洲型舞毒蛾幼虫的毒性与拒食作用
DOI: 10.3969/j.issn.1000-2006.2013.04.015, PP. 80-84
Keywords: 亚洲型舞毒蛾,幼虫,植物源杀虫剂,毒性,拒食作用
Abstract:
为筛选出有效防治亚洲型舞毒蛾的最佳植物源杀虫剂,采用5%鱼藤酮、1%虫菊？苦参碱、5%桉油精、0.6%氧苦？内酯4种植物源杀虫剂,比较它们对舞毒蛾3龄幼虫胃毒和触杀处理后的毒性与拒食作用。结果表明:这4种植物源杀虫剂对舞毒蛾3龄幼虫均具有胃毒和触杀两种作用,其急性毒性总体表现为触杀处理大于胃毒处理,而在各自相对最高的浓度条件下,以0.6%氧苦？内酯的胃毒急性毒性为最大、5%桉油精次之;由于胃毒组的lc50均小于触杀组,因而胃毒处理的毒力更高;此外,0.6%氧苦？内酯和5%桉油精的胃毒和触杀毒力均远远高于其他两种药剂,并以前者为最高。对测定前后的饲料量进行比较后发现,4种药剂对舞毒蛾3龄幼虫均具有很好的拒食作用,尤其以5%桉油精5000倍液处理的拒食率高达99.31%。因此,0.6%氧苦？内酯和5%桉油精可作为防治亚洲型舞毒蛾的首选植物源杀虫剂推广应用。
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