If you have either, you're paying to keep the soybean aphid away from the crop that feeds cattle and pigs.
如果你有二者之一，你要为防止大豆蚜虫侵害饲养牛和猪的作物而买单。
So can the movement of aphids when, having depleted the young leaves on one food plant, their offspring then fly onward to a different host plant, with no one aphid ever returning to where it started.
蚜虫的运动也是如此，当吃完一株食用植物的幼叶，它们的后代会飞到另一株宿主植物上，没有蚜虫会再回到最初的地方。
Now 70-80% do. The aphid that causes potato blight now appears a month earlier than it used to, so it feeds on the plant at a more vulnerable point in its life.
现在70- 80%的蚜虫都有了这种耐药性，蚜虫导致的马铃薯晚疫病，现在出现比以往提前一个月来，所以蚜虫在植株的脆弱期就开始啃噬植株。
"And the big thing that made a difference in the ability to find that out was the genome sequence of the aphid was completed recently," she says.
“最近完成的蚜虫基因组序列计划是一件大事情，它让我们的研究能力获得极大提高，”她说。
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。
Rothamsted Research, home to the Broadbalk experiment, has been tracking aphid infestations for 50 years.
洛桑研究院的Broadbalk实验，五十年来一直在跟踪蚜虫的侵扰。
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。
These varieties are a reminder of the battle against phylloxera, a small, root-munching aphid that did incalculable damage to the wine business in the last 35 years of the 19th century.
19世纪最后35个年头里，葡萄虫——一种体型微小、喜食树根的蚜虫——肆虐，葡萄酒厂为此损失惨重。
The effect of symbiont on growth and reproduction of the black bean aphid, Aphis craccivora KochObtaining aposymbiotic aphids is key to study the relationship between the aphid and Buchnera.
共生菌在黑豆蚜生长和繁殖中的作用研究蚜虫与细菌的共生关系，首先要获得脱共生蚜虫。
The results presented in the paper make it possible to select the proper materials in aphid-resistant breeding and genetic study of soybean.
研究结果对大豆抗蚜育种及遗传研究中抗源材料的应用提供了保障。
There is adequate variability in plants to breed for resistance to certain aphid vectors.
植物有充分的变异性可用于培育对一些蚜虫介体的抗性。
He used aphid fecundity data to elucidate the theoretical effects of antibiosis on insect population dynamics.
他利用蚜虫繁殖力资料说明了抗生作用对虫口动态的理论效应。
All these laid down a soild foundation for researches on aphid metabolism, identification of insecticide, the physiological and biochemical resistance mechanism of crops to aphid.
这为进一步深入研究蚜虫生理代谢、测定杀虫剂效果和探讨作物抗蚜生理生化机理等奠定了实验技术基础。
The aphid possess positive taxis to golden and negative taxis to silver grey.
蚜虫对金黄色具有正趋性，对银灰色具有负趋性。
Since aphid population may become resistant to organophosphorus compounds, avoid excessive spraying.
因为蚜虫类对有机磷化物能产生抗性，所以要避免过多的喷洒。
The garden of the dominant species in the aphid species, the number of great changes have taken place, and these changes in landscape and plant in Wuhan is closely related to the restructuring.
其园林蚜虫的优势种群在种类、数量上都发生了很大变化，而且这些变化与武汉地区园林植物结构的调整密切相关。
Matrine had broad-spectrum killing pesticide activity to acaridae, Pieris rapae L. and aphid.
苦参碱具有广谱杀虫活性，对叶螨、菜青虫、蚜虫均具有活性。
Nutritive condition is the key factor to influence population and differentiation of the aphid.
营养条件是影响桃瘤头蚜田间数量及分化的关键因素。
The acetamiprid pesticide is mainly applied to rice fulgorid, aleurocanthus spiniferus and aphid on the paddy rice, fruit trees and vegetables.
该发明主要应用水稻、果树及 蔬菜上的稻飞虱、黑刺粉虱及蚜虫。
Proposals on further research to plant killing aphid are put forward.
并对杀蚜植物进一步研究应注意的问题提出了建议。
The mutation from DAG to DTG resulted in low transmission efficiency, even loss of the transmission ability by aphid.
结合前面的序列比对得出结论，DAG基序突变为DTG能使病毒的蚜传活性大大降低，甚至丧失。
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 aphid is now laying waste to the wheat and barley fields.
蚜虫正在毁掉一片片的小麦和大麦田地。
To the major natural enemies of apple like the Chrysopa, the aphid fly eats, the ladybug, the ichneumon wasp, the trapping and killing capacity is 208, 38 and 36 and 99 respectively.
对苹果园主要天敌如草蛉类、食蚜蝇类、瓢虫类和姬蜂类的诱集量分别为208头、38头、36头和99头。
This paper is the research about the biological properties of Paecilomyces cateniannulatus the quality to cause the Cabbage caterpillar and aphid infected and the mechanism of the infection.
本文通过对环链拟青霉生物学特性、环链拟青霉对菜青虫、蚜虫致病性及固体培养料筛选的研究。
Satisfactory results were obtained in a rearing room using radish seedling as plant host to propagate peach aphid for mass rearing a.
在繁蜂室内用萝卜苗饲养桃蚜繁殖烟蚜茧蜂取得满意的结果。
The results of the study could be applied in the identification and breeding of cotton resistance to aphid.
本文结果可应用于棉花抗蚜性鉴定及其育种上。
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 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。
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