查询词典 aphides

"In order to obtain the material," reads the report of the tests, potted rose bushes are brought into a room and placed in front of a closed window. If the plants are allowed to dry out, the aphides, previously wingless, change to winged insects.

他的实验报告中这样写到：我们将盆栽的玫瑰移至房内一闪关闭的窗前，如果玫瑰干枯，那寄生其中的蚜虫，为了获取养料，竟由一只无翅的昆虫变成了一只有翅的飞虫。

It had strong washing action on cereal aphides and predators above moderate rain, and the larger the rainfall, the greater the scour rate.

结论］中等以上雨量对麦蚜与捕食性天敌有较强的冲刷作用，雨量越大，冲刷率越大。

By comparison among different methods, it was found that arrest-board together with drug insufflation application was an effective method for prevent and cure aphides indoors.

使用捕虫板法、喷洒药物法和综合法对蚜虫进行防治，通过效果比较，发现综合法是培养室内拟南芥蚜虫防治的理想方法。

Rain wash test was respectively conduced in jointing stage, flowering stage, filling stage, the effects of rain wash on quantities of cereal aphides and predators.

在小麦的拔节期、抽穗扬花期、灌浆期分别进行雨水冲刷试验，研究不同级别的雨水冲刷对麦蚜与捕食性天敌数量的影响。

The sufficient conditions of robust stabilization of the system are obtained.The conclusion is significant in practice to forecast and control the red tide.Next,for a kind of spruce aphides and their predator international model,an adaptive fuzzy controller with biological characteristic is introduced in this paper.

其次研究了一类云杉蚜虫与其天敌相互作用模型，通过对捕食者和被捕食者同时施加控制，将生物特性引入模糊自适应控制。

Investigation on the occurrence of plant diseases and insect pests on Chaenomeles lagenariaKoidz in Chang-yang county, the main plant diseases and insect pests are fruits mothes and aphides and brown rotten disease.

通过对长阳地区资丘木瓜的病虫害发生情况进行调查，当地资丘木瓜上的主要病虫害为"两虫一病"，即食心虫、蚜虫和褐腐病。

The results showed that lambda-cyhalothrin 2.5% WP had a preferably good quick and persistent efficacy, its recommended usage 300-450 g/hm2 could kill more than 80% of the aphides and this efficacy could last for 10 days without safety problems to cruciferae vegetables.

试验结果表明：2.5%高效氯氟氰菊酯WP对防治十字花科蔬菜蚜虫有较好的速效性和持效性；推荐制剂用量为300~450 g/hm2，防效可在80%以上，持效期达10 d，且对作物安全。

According to the change of the enemy\'s quantity and the qualitative theory of the differential equation, we research the spruce aphides and its predator system. At the same time, we discussion the spruce aphid multiplication model when the natural enemy quantity is a certain value and the periodic oscillating model whose the quantity of the natural enemy changes along with the time. Obtains the stability condition of the balance point and the limit-cycle existing condition, the system presents the dissipative structure\'s character. Finally it explains that this theoretical analysis has certain practical significance regarding the preventing and controlling harmful insect.

第五章，松毛虫与其天敌的关系是食饵和捕食者的关系，根据天敌数量的变化，利用微分方程定性理论，研究松毛虫与天敌系统，讨论天敌数量为一定时的松毛虫增殖模型和天敌数量随时间变化的周期振荡模型，得到正平衡点全局稳定性和极限环的存在条件，通过计算机模拟，说明周期振荡的捕食模型能够呈现典型的时间耗散结构特征，对于防治害虫有一定的实际意义。

Investigation on the occurrence of plant diseases and insect pests on Chaenomeles lagenariaKoidz in Chang-yang county, the main plant diseases and insect pests are fruits mothes and aphides and brown rotten disease.

通过对长阳地区资丘木瓜的病虫害发生情况进行调查，当地资丘木瓜上的主要病虫害为&两虫一病&，即食心虫、蚜虫和褐腐病。

When these parameters surpass a certain value, the system cannot appear the limitcycle. Through the various parameters\' changing, it demonstrates the forming process of the dissipative structure. Thus it show the dissipative structure\'s characteristic of the trophodynamics predation model and point out the ecological significance of the various parameters in the model.On the fourth chapter, the spruce aphides and its predator model is a predator model.

第四章，以两个捕食者作用于同一食饵的竞争关系模型为例，应用微分方程定性理论，对捕食模型中存在极限环的情况进行了讨论，用MATLAB在相平面上模拟出系统的极限环，此时该体系状态的发展呈现周期振荡趋势，从而揭示出营养动力学为基础的捕食模型耗散结构特征。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。