对幼虫的生物活性，均随虫龄的增加而下降，且集琦虫螨克的活性远比菜喜高。
The larvicidal activity of avermectin was significantly higher than that of spinosad, and both decreased with increase of the larval age.
瑞琦饰品（广州）公司是集设计，生产和经营为一体的珠宝首饰专业公司。
Yiwu Wnice Jewelry Co. , Ltd. is specialized in producing bracelet and bangle, earring, brooches, key chain and ring of manufacturer.
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