aphids

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

有性生殖和无性生殖的交替.

互联网摘选

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.

词典精选例句

The young beetle larvae can eat hundreds of aphids.

而幼龄瓢虫则可吃掉数百只蚜虫.

互联网摘选

The natural enemies of maize aphids were studied in Shenyang from 1980 to 1991. The result showed that there were 13 species insects in Hexapoda, 2 species in Arachnoidea and 1 species in fungus.

1980～1991年研究表明，沈阳等地玉米田蚜虫天敌有昆虫纲13种，蜘蛛纲2种，真菌1种。

互联网摘选

Wind has little influence on sedentary aphids.

风对不动的蚜虫很少有影响.

词典精选例句

Prediction model of alate aphids migration peak period in Shandong tobacco growing region

山东烟区有翅蚜迁飞高峰期预测模型的建立及应用

互联网摘选

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.

词典精选例句

More impressive, aphids got their ability to make carotenoids through a major shortcut.

更令人印象深刻的是蚜虫是走捷径才能产生类胡萝卜素的.

互联网摘选

Aphids are transmitters of plant diseases.

蚜虫是植物疾病的传播者.

互联网摘选

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.

互联网摘选

She pinched the aphids off the rose.

她从玫瑰(花)上抓走蚜虫.

词典精选例句

As a large group of Hemiptera, aphids are distributed worldwide and most of them are pests.

蚜虫是半翅目中一类体型较小的昆虫,广布于世界各地,其中绝大部分是农林害虫.

互联网摘选

Bunchy top disease can spread from plant to ant it and is also spread by? aphids .

束顶病可以在植株之间传播,也能通过 蚜虫 传播.

互联网摘选

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.

互联网摘选

The tests on 2 % octadecyl trimethyl ammonium chloride showed good result against the cabbage aphids.

绿清灵即2%十八烷基三甲基氯化铵可溶性粉剂,对蔬菜蚜虫具有较好的防治效果.

互联网摘选

A field may be smothered with aphids.

一块田的植株可以被蚜虫盖满.

词典精选例句

The larvae prey upon small aphids.

这种幼虫以小蚜虫为食。

词典精选例句

Disease: Aphids, mealy bugs, powdery mildew, fungal leaf spot, stem and root rot if over watered.

病虫害: 蚜虫, 介壳虫, 白粉病, 真菌叶斑病, 如果超过浇水可患茎、根腐病.

网络文摘精选

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.

互联网摘选

In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.

一些昆虫种类，如蚜虫，出现无翅个体，被称为无翅型。

互联网摘选

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.

词典精选例句

This thesis is to study the insecticidal effect of PC to aphids and Plutella xylostlla.

本文研究蝉拟青霉对蚕豆蚜虫和小菜蛾的杀虫作用.

互联网摘选

A method for mass culture of wheat aphids was developed using wheat seedling as forage.

介绍利用水培麦苗大量饲养麦蚜的技术.

互联网摘选

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.

词典精选例句

Ladybugs, also called ladybird beetles, eat aphids-small, soft insects that look like tiny grains of rice.

小甲虫, 也称为瓢虫, 食蚜小, 软昆虫,看起来像小粒大米.

互联网摘选

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.

新概念英语第三册

Bunchy top disease can spread from plant to plant and it is also spread by aphids.

束顶病可以通过个体间传播,也可以通过蚜虫传播.

互联网摘选

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.

互联网摘选

Bunchy top disease can spread from plant to plant and is also spread by aphids.

束状植物的疾病可以从植物到植物的扩展,同时也通过蚜虫传染.

互联网摘选

A significant linear relationship was found between the trapped aphid number and aphid incidence in current shoots. Thus, prediction confidence intervals of aphids on traps combining with the occurrence peak of apterous aphids in fields were suggested to estimate aphid occurence.

同时田间新梢蚜虫发生率与黄板上蚜虫诱集量有显著的线性关系，可以利用黄板上蚜虫诱集量平均值的预测区间结合田间无翅蚜发生高峰来预测田间蚜虫的发生情况。

互联网摘选