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Studies on the biological activity of Avermectins against vegetable leafminer Liriomyza sativae Blanchard (Diptera: Agromyzidae)
Author(s): 
Pages: 28-34
Year: Issue:  1
Journal: ACTA ENTOMOLOGICA SINICA

Keyword:  美洲斑潜蝇Avermectins揭阳霉素;
Abstract: Avermectin类农药对美洲斑潜蝇Liriomyza sativae Blanchard生物活性的室内研究结果表明:揭阳霉素对美洲斑潜蝇1、2、3龄幼虫的LC50分别是1.54×10-4 g/L、3.73×10-4 g/L、1.99×10-3g/L;害极灭对上述幼虫的LC50分别是1.48×10-4 g/L、3.68×10-4 g/L和1.97×10-3g/L.美洲斑潜蝇幼虫对Avermectin类农药以1龄最敏感,其中揭阳霉素对3龄幼虫的LC50是1龄的12.9倍.揭阳霉素对雌成虫24 h、48 h的LC50分别是3.12×10-3 g/L和2.08×10-3g/L,其对美洲斑潜蝇取食、产卵拒避持效期分别是4~8天和10天.使用浓度0.005g/L揭阳霉素处理6天、8天和10天后接虫,幼虫的存活率分别是0、16.13%和28.07%.田间使用浓度0.005g/L的揭阳霉素和0.0045g/L的害极灭分别处理,6天后的校正虫口减退率分别为91.0%和90.9%,两者差异不显著,而使用浓度0.0067g/L揭阳霉素处理,6天后校正虫口减退率为93.6%.
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