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huan jing tiao jian dui le guo can liu dong tai ying xiang de chu bao
Author(s): 
Pages: 155-157
Year: Issue:  2
Journal: Acta Entomologica Sinica

Keyword:  残留动态外界环境条件浙江农业大学稀释液消失速率残效期放射性紫外线照射不同光照条件防治效果;
Abstract: <正> 乐果系一种高效低毒的内吸剂,目前广泛应用于防治蚜虫,红蜘蛛等害虫。但对这些发生期长,繁殖力强的害虫来说,药剂残效期的长短与实际防治效果有密切关系。一般报导乐果残效期较短,例如(1960)指出仅一周左右。不过也有报导在果树及棉花上,药效可维持2—3星期(Chilwell et al.,1960;Dauterman et al.,1960)。我们前一试验用P32乐果处理棉株叶部,也发现叶面的药剂消失很快,至第七天几乎全部消失殆尽,
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