Sap passes right through the aphides'bodies, only getting a little thicker and sweeter.

When growing vegetables, one must guard against cabbage aphids.

菜农在种植蔬菜时一定要注意防治菜蚜.

Chrysopidae and Hemerobiidae ; larvae feed on insect pests such as aphids.

两种薄纱状翅膀的昆虫之一(蛹与褐 蛉 )其幼虫吃诸如蚜虫等的害虫.

The young beetle larvae can eat hundreds of aphids.

而幼龄瓢虫则可吃掉数百只蚜虫.

Fungal pathogens are important natural biological control agents of aphids.

病原真菌是蚜虫的重要自然控制因子.

Viruses are transmitted by VECTORS such as aphids and nematodes.

病毒的传播由传染媒介执行,例如蚜虫和线虫.

Alternation of sexual and parthenogenic generations , as in some aphids.

有性生殖和无性生殖的交替.

Certain aphids seem to prefer waxy leaves, whereas other species are repelled by them.

有些蚜虫,看来喜欢有蜡质的叶片, 而这种叶片对另一些蚜虫却有拒避作用.

Phloem elements and adjacent tissues are the principal feeding sites for most aphids.

韧皮部及其邻近组织是大多数蚜虫的主要取食部位.

However, reproduction rates of some insects such as aphids are influenced by nutrition.

然而, 一些昆虫的繁殖率,如蚜虫等是受营养影响的.

Clusters of tiny insects called aphids were to be found on the underside of the leaves.

结果在树叶背面找到成串的叫作蚜虫小虫子.

A field may be smothered with aphids.

一块田的植株可以被蚜虫盖满.

Wind has little influence on sedentary aphids.

风对不动的蚜虫很少有影响.

She pinched the aphids off the rose.

她从玫瑰(花)上抓走蚜虫.

Heavy rain or hail may dislodge many aphids from the plants.

大雨和冰雹可从植株上击落很多蚜虫.

The larvae prey upon small aphids.

这种幼虫以小蚜虫为食。

It has obvious effect to wheat or vegetable aphis, and no harm to and beneficial insect.

本杀虫剂对小麦蚜虫和蔬菜蚜虫防效显著, 对天敌和人畜无害.

If is APHIS offers some suggestions aways to keep away predators . A project.

蚜虫也有一些方法能赶走食肉动物.

The Aphis gossypii Glover is one of the main pests of cotton, cucurbits and other crops.

棉蚜是一种重要的农业害虫,能危害棉花 、 瓜类及多种观赏植物,并能传播植物病毒病,给农业生产带来重大损失.

The Wildlife Services program is part of the Animal and Plant Health Inspection Service, or APHIS.

“野生动植物服务”项目是动植物卫生检疫服务机构(APHIS)的一部分.

Aces APHIS offers some suggestions of ways to keep away predators.

APHIS提供一些远离食肉动物的方法的建议.