摘要
通过频次分布χ２检验和９种分布型指数的测定，白杨透翅蛾幼虫的空间分布型为一般负二项分布，空间分布的基本成分是疏松的个体群，个体群的分布为聚集型。当ｔ＝１，Ｄ＝０．２５时的理论抽样数为：ｎ＝２０．８０６４／Ｘ＋１０．９０４，在防治指标为０．１０头／株时，最大抽样数为２２０株。序贯抽样的累积虫量界限为：Ｔｏ（Ｎ）＝：０．１０Ｎ±０．３６９５Ｎ。该幼虫的田间简单随机抽样以平行线法为最佳。
With X2- test of freqency distribution and indices test of 9 distribution models, thespace distribution model of Paranthrene tabaniformis larvea was negative binomial one. Thefundamental element of space distribution was the crowd of individuals. The distribution ofthe crowd of individuals was crowding style. When t equaled l and D 0.25, the thcoreticalsampling number was n= 20.8064 / x+ 1 0.3904.When the control target was designed as 0.10larva per tree,the maximum sampling number was 220 trees,and the limit of accumulatedlarva for sequential sampling was T0 (N)= 0.10N ± 0. 3695N . Method of paralled line wasthe best simple random sampling one in fields for the larvae.
关键词
白杨透翅蛾
空间分布型
杨树
Paranthrene tabaniformis Rott, space distribution modcl
indcx of distributionmodel
sequential sampling
