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研究表明,大袋蛾袋囊中的活幼虫空间分布型呈聚集分布。在夏末、秋冬季,当允许误差D=0.2时,不同虫口密度下X的抽样数为n=(167.5700)/X+10.2525;在冬季当D=0.05时,且不同活体老熟幼虫虫口密度为X,理论抽样数为n=(246.6000)/X+209.9200。大袋蛾袋囊及越冬活幼虫在东、西、南、北各方位的分布,以南方聚集度最大,种群数量最大,大袋蛾在各轮枝上垂直分布经F测验,各轮枝间差异不显著。
Studies have shown that the spatial distribution of live larvae in the moth bag is aggregated. In the late summer, autumn and winter, when the allowable error D = 0.2, the sampling number of X under different population density was n = (167.5700) /X +10.2525; when D = 0.05 in winter, the population density of mature larvae Is X, the theoretical number of samples is n = (246.6000) /X +209.9200. Larvae and overwintering live larvae in east, west, south and north of each distribution, the largest concentration in the south, the largest population, large moths on each branch of the vertical distribution by F test, the difference between the rotation Significant.