棉蚜

Cotton aphid is one of the most important insect pests of cotton in China.

棉蚜是棉花的重要害虫之一。

The temporal and spatial niche breadth value of Propylaea japonica was maximum, and the temporal niche overlap value of Theridion octomaculatum between dominant predatory enemies and Aphis gossypii was maximum and the spatial niche overlap of Pardosa T-insignita was maximum.

对淮北棉田节肢动物优势种群组成和时空生态位进行分析，结果表明：棉蚜、烟粉虱、棉叶螨、棉盲蝽、四点亮腹蛛、龟纹瓢虫、T-纹豹蛛、草间小黑蛛、八斑球腹蛛、华姬猎蝽、小花蝽和青翅隐翅虫为优势种群；时间和空间生态位宽度值都是以龟纹瓢虫最大，捕食性天敌优势种群与棉蚜时间生态位重叠值以八斑球腹蛛最大，空间生态位重叠值以T-纹豹蛛最大。

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 number of cotton aphid from April to October in 1990 was investigated, and then trend analysis and periodic analysis were made with lab's data.

于1990-04~10对大田棉蚜种群数量进行调查统计，对棉蚜种群数量的周期性及趋势性进行分析。

The spatial aggregations are various under large and small scales in different occurrence stage of cotton aphid.

在不同阶段不同尺度下棉蚜种群的空间格局表现出的聚集程度不同(1)始发期：大尺度下模型始发前期为块金模型，后期为指数模型，表明样本区域内棉蚜种群空间格局始发前期呈随机分布，而后期呈现聚集型分布。

The selective behaviour, fitness, cause formation and population differentation of the cotton aphid''s host biotype were studied on this project. The results showed that the cotton and cumbrits biotype aphid were existed in natural population in Nanjing .

本项目研究了南京地区棉蚜对寄主的选择与适应性、寄主专化型的成因、寄主专化型蚜在DNA水平上的多态性及棉蚜迁飞特性的种群分化、迁飞型种群的遗传响应与杂交遗传。

The regression period of cotton aphid: The spatial patterns of aphid population were confirmed to exponent, linear and nugget model under large scale along with the time sequence, respectively, results suggested that the spatial patterns were aggregated, medium intensity aggregation and random distribution, respectively, and the space continuity is decreasing.

3消退期：大尺度下按时间顺序，棉蚜的变异函数模型分别为指数型、线性及块金模型，表明空间格局分别表现为聚集型、中等强度和随机分布，棉蚜种群的空间自相关性及空间连续性在后期递减。

137 Crude protein also has effect on controlling the growth of cotton aphid, cotton bollworm, striped rice borer, and the crude protein deposited with 25 percent ammonium sulfate has the most significant effect on controlling cotton bollworm and cotton aphid.

88—137粗提蛋白质对棉蚜、棉铃虫、二化螟的生长发育也有一定抑制作用，其中用25％硫酸铵沉淀的粗提蛋白质抑制棉铃虫、棉蚜作用最明显。

Simian3 and Shiyuan321 as control. It showed that both GK12 and SGK321 had no significant impacts on natural control efficacy of the biological and non-biological death factors of cotton aphids. Except for the factor of natural death and others, predation was the key factor affecting population dynamics of cotton aphid. Rain ranked the second, parasitism by insects and pathogens had weak control efficacy.

与常规棉相比，单，双价抗虫棉对天敌捕食和寄生，病原物，风雨等生物和非生物因素对棉蚜种群的自然控制作用均未产生显著影响；各因素中，除自然死亡及未知因素死亡外，天敌捕食对棉蚜自然种群的控制作用最强，风雨的作用次之，天敌寄生和病原物的作用则较弱。

Results from the study of population spatial heterogeneity on cotton aphids and ladybirds in different directions show that both cotton aphids and ladybirds displayed similar the semi-variogram models in four directions, but the range of aphids and ladybirds model are different, it belongs to the geometric anisotropy.

对不同方向上棉蚜种群空间异质性研究表明：棉蚜、瓢虫在四个方向上的半变异函数拟合的模型相同，但空间依赖范围却不同，属几何性的各向异性。

This brought fixed cost, but it also is meant at the same time use a source to won't make you singlehanded assume a problem.

这带来了一定的成本，但它同时也意味着使用开源不会让你独力承担问题。

He gained a small fortune in real estate.

他在房地产上发了一笔小财。