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。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。