期刊论文

SPATIAL DISTRIBUTION PATTERN OF Heliothis assulta EGGS AND ITS APPLICATION IN THEDECISION OF CHEMICAL CONTROL

中文

湖南农业大学学报(自然科学版)

1007-1032

1992

S2

450-461

本校为第一机构

烟青虫卵是化学防治的主要对象.在研究浏阳烤烟栽培田内烟青虫主害代卵的消长过程和空间分布型的基础上,1)建立了百株卵量（y）与有卵株率（x）的幂函数关系;y=0.765x1.2072;2)利用分布型参数K值,Iwao回归式中的α,β值,Taylor幂法则中的a,b值以及森下正明的Iδ值建立了虫卵的理论抽样数模型;3)利用Wald M.（1943）,Kuno（1969）,Iwao（1975）和Willson（1983）提出的序贯抽样法.得到了烟青虫卵的6个不同序贯抽样模型,同时建立了Kuno-Iwao的复合序贯抽样法;4)通过调查卵在烟株上的垂直分布规律,明确了化学防治的靶标区域.以上均可为烟青虫的化学防治提供决策依据.

Eggs of tobaco budworm (Heliothis assulta Guene'e) are the target of chemical control for this pest. Based on the studies of the seasonal fluctuation and the spatial egg distribution patterns, we have obtained (1) the equation for eggs per hundred plants (y) related to the percentage of plants with eggs(x) is y=0.765x~(1·2072); (2) the distribution parameters-K, Twao's α, β, Taylor's a, b and Morisita's Iδ are applied to the models for optimization sampling of eggs to this pest; (3) six sequential sampling models of tobacco budworms have be...