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根据贵州不同地区7个果园的49组调查资料，以枝和叶为单位统计，采用聚集度指标判别法，对黑刺粉虱种群在柑桔树上的空间格局进行了初步探讨。结果表明，黑刺粉虱种群在任何密度下均表现为聚集型，聚集原因可能是环境因素对成虫产卵的影响或由成虫本身的产卵习性所决定。文中还用Taylor式中的参数a，b确定理论抽样数及序贯抽样。
According to the survey data of 49 groups of 7 orchards in different regions of Guizhou Province, the spatial pattern of the blackfly population on citrus trees was preliminarily studied by the statistics of branches and leaves and by the method of aggregation index. The results showed that B. tabaci populations showed aggregation at any density, and the aggregation may be due to the effect of environmental factors on adult eggs or the adults’ own spawning habits. The paper also uses Taylor’s parameters a, b to determine the theoretical number of samples and sequential sampling.