And it's bad for one species to be responsible for aphid control with no backup.
而且，只有一个物种负责蚜虫控制而没有替换物种也很不妙。
Seven-spotted ladybugs are native to Europe but were brought to North America in the mid-1900s to control aphid populations.
七星瓢虫原产欧洲但为了控制蚜虫的数量于1900年期间被引入到北美。
The interference index of population control, IIPC was used to evaluate the control effect of Avermectins, Yasimie and Yasimiejin on peach-aphid.
应用干扰作用控制指数法评价了阿维菌素、蚜虱灭、蚜虱蓟净等杀虫剂对桃蚜种群控制的作用。
The antifeed activity, toxicity and control effects of urinary wash mixture with different proportion of urea and washing powder on mustard aphid were studied in this paper.
对不同配比的尿洗合剂对菜蚜的拒食活性、触杀毒力和控制效果进行了研究。
Harmonia axyridis is protected and used in the produce of fruit trees, which can control aphid effectively and also assure edible safe of the fruit.
在果业生产中，就地取材保护利用异色瓢虫，不仅可以有效控制果园蚜虫，而且能够保证人们安全食用果品。
This paper deals with a detailed review on the species, biology, ecology and their effect on biological control of aphid hyperparasitoids.
对蚜虫重寄生蜂的种类、生物学特性、生态学特性及蚜虫重寄生蜂对生物防治的影响进行了较详细的综述。
The results of field trial showed that 4 pesticides gave good control effect against wheat aphid, Macrosiphum avenae(F.
田间试验结果表明，四种杀虫剂对小麦蚜虫均有较好的防效。
Acetamiprid 3% EC provided excellent control of cucumber aphid in field experiments.
田间药效试验表明，3%啶虫脒乳油防治黄瓜蚜虫具有较好的防治效果。
The field efficiency test of the insecticide showed that 10% Pi-Mie WP solution was safe to crops and could effectively control cotton aphid.
田间药效试验结果表明，用10%吡·灭WP防治棉蚜有良好的防治效果。
The results will be useful to guide the control of the soybean aphid in fields and provide basic knowledge on mass production, storage and utilization of L. fabarum in future.
本研究结果可以对大田大豆蚜的防治提供指导， 也为今后大量生产、贮藏、利用豆柄瘤蚜茧蜂提供一定的理论基础。
So far, there are little better methods other than application of chemical pesticides for the control of the aphid.
目前对它的防治主要依靠化学农药，其他防治方法应用很少，从而带来了一系列的负面影响。
The integrate management including properly using insecticide, agricultural control and biological control is used to control the insecticide resistance of cotton aphid.
对棉蚜的抗药性治理主要采用合理用药，结合农业和生物防治等措施进行综合治理。
Aphid is one kind of destructive pest in agricultural production. For a long time, the prevention and control of aphids has been mainly depended on chemical pesticide.
蚜虫是一种严重危害农业生产的害虫，长期以来，对蚜虫的防治主要依靠化学农药。
Aphid is one kind of destructive pest in agricultural production. For a long time, the prevention and control of aphids has been mainly depended on chemical pesticide.
蚜虫是一种严重危害农业生产的害虫，长期以来，对蚜虫的防治主要依靠化学农药。
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