摘要
本文根据山楂叶螨成螨空间格局的信息,分析比较了其在苹果树上、中、下三层树冠两种序贯抽样估计成螨密度的预定截止线公式和两种用于指导防治的序贯抽样模型,结果表明:在估计成螨密度时,Green序贯抽样的预定截止线较容易达到;在指导防治时,用Iwao模型更容易作出决策。
The sequential sampling technique of the adults of the hawthorn spider mite, depending onthe spatial patterns of the pest in apple trees, was studied in this paper. Based on the Iwao's m-m regression method and Taylor's power law, 2 sequential sampling truncated design formulaswhich are used to estimate the density of the adults and 2 sequential sampling models which areused to direct the control of pest were proposed. Comparing results showed that the truncateddesign of Green's can be attained easily for estimating the density of the adults; the decision canbe made easily by using Iwao's model for directing the control of hawthorn spider mite.
出处
《安徽农业大学学报》
CAS
CSCD
1993年第2期162-168,共7页
Journal of Anhui Agricultural University
关键词
山楂叶螨
序贯抽样
防治
Hawthorn spider mite
Sequential sampling
Risk decision
