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应用聚集度指标和回归分析,对杏园吐伦球坚蚧Rhodococcus turanicus Arch.空间分布型进行研究,结果表明:在中度受害杏园,吐伦球坚蚧越冬若虫和初孵若虫呈聚集分布,聚集度随虫口密度增大而减小;聚集原因与吐伦球坚蚧本身的生活习性有关;确定了不同种群密度下、不同允许误差下的最适抽样数。通过对不同方位虫口密度进行数据分析,结果表明,吐伦球坚蚧若虫在杏树各方位的聚集是随机的,各方位对整体抽样均无代表性。
The spatial distribution patterns of Rhodococcus turanicus Arch in the apricot orchard were studied using the clustering index and regression analysis. The results showed that the overwintering nymphs and newly hatched nymphs in the moderately harvested apricot orchard, , The aggregation degree decreases with the increase of population density; the reason of aggregation is related to the living habit of Tuon ball Chinensis itself; and the optimal sampling number under different population densities and different allowable errors is determined. Through the data analysis of the population density of different orientations, the results showed that the aggregates of Aphelencho nymphaea nymphs in the apricot trees were random, and all directions were not representative of the overall sampling.