论文部分内容阅读
本文对外来入侵害虫扶桑绵粉蚧Phenacoccus solenopsisTinsley雌成虫在大花马齿苋(Portulaca grandiflora Hook)上的空间分布特征进行了研究。结果表明,在水平上的空间分布表现为聚集分布,个体间相互吸引,分布的基本成分为个体群;雌成虫密度m和平均拥挤度m*间的回归方程为:m*=12.4595+1.2649m;雌成虫在大花马齿苋枝条上、中层虫口数量均显著多于下层。确定了不同虫口密度及不同允许误差下的最适抽样数。
In this paper, the spatial distribution characteristics of Phenacoccus solenopsis Tinsley female adults on Portulaca grandiflora Hook were studied. The results showed that the spatial distribution in the horizontal distribution was aggregated and the individuals were attracted to each other. The basic components of the distribution were individual groups. The regression equation between female adult density m and average crowdedness m * was: m * = 12.4595 + 1.2649m Female adults in the Portulaca oleracea branches, the number of mid-level population were significantly more than the lower. Determine the different population density and different allowable error under the optimal sampling number.