查询词典 Aphis

The evaluated model of dominant predatory enemies to Aphis gossypii was constructed considering the number, temporal and spatial niche, predatory capacity of dominant predatory enemies at the same time, and based on model the control effect of Propylaea japonica was maximum, arriving at 19.82%.

综合分析了捕食性天敌优势种群的数量、与棉蚜发生在时间上同步性和空间上同域性以及捕食量大小，建立了捕食性天敌优势种群对棉蚜控制作用模型，以龟纹瓢虫控制作用指数最大，达19.82%。

The effect of transgenx Bt cotton on non-target insects The kinds of the dominant species of pests in transgenic cotton field had obvious change, in which the H. armigera was no longer the main pest and the piercing-sucking pests such as Aphis gossypii, Tetranychus urticae, Thrips tabaci etc. rose the main pests. The kinds of the dominant species of predatory natural enemies seemed to be no variation, which was still Propylaea japonica Thunberg. Because of the effect of transgenic Bt cotton on H. armigera laevae-the development delay, the weight reduction, which affected the qualities of parasitic enemies, leading to the reduction of the weight of cocoon and the weight of adult, and the reduction of H.

转Bt基因棉对节肢动物群落整体结构及时序变化的影响 2001保铃棉与冀抗668的相似系数最高(0.8246)，冀抗668、保铃棉与常规防治的相似系数依次0.6459、0.5829，保铃棉和冀抗668与常规不防治的相似系数为0.5669、0.4485.2002 年与冀杭668的相似系数最高(0 。6887)，保铃棉和冀抗668与常规防治相似系数为0.4739、 0.3828，保铃棉和冀抗668与常规不防治的相似系数为0.3124、0.3999，此结果表明，两转Bt 基因棉田节肢动物群落的整体结构一致，相似性较大，与常规防治相比，相似系数有所降低，表明常规功治棉田中人为控制因素对节肢动物有一定影响；转Bt基因棉对节肢动物群落有一定影响，但并不显著。

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

野生动物服务项目是动物和植物健康检测服务的一部分。

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

野生动物服务项目是动植物健康检查服务的一部分。

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

野生动物服务计划是动植物健康检查服务计划的一部分。

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

野生动物服务机构是美国动植物检验署的一部分。

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的一部分。

APHIS offers some suggestions of ways to keep away predators.

该机构提供了一些驱逐掠食者的建议。

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

野生服务项目是动植物健康观察服务的一部分，该机构提供一些赶走掠食者的建议方式。

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

野生动物服务是动植物卫生检疫局的一部分。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。