安徽农业科学2011，Vol.39Issue(19)：11504-11505,2.
玉米田四代棉铃虫老熟幼虫空间分布型应用
Spatial Distribution Pattern Application of Fourth-Generation Mature Larvae of Cotton Bollworm (Helicoverpa armigera Hübner) in Maize Field
李贺年 1齐巧丽 1李德新 1姚克荣1
作者信息
- 1. 保定职业技术学院,河北,保定,071051
- 折叠
摘要
Abstract
[ Objective ] The paper was to study the spatial distribution pattern of fourth-generation mature larvae of cotton bollworm in maize field. [ Method] The plots with different occurrence densities of fourth-generation cotton bollworm were investigated during August to September in 2009. Six groups of sampling data were obtained, and seven indicators were used to determined its spatial distribution pattern. including aggregation index method, lwao method and Taylor method, etc. [ Result] Aggregation index test showed that in all plots, Moore I ＜ 0,Lloyod m*/m ＜ 1, Kuno Ca ＜0, diffusion coefficient C ＜ 1, diffusion index Iδ ＜ 1, negative binomial distribution K ＜0, indicating that mature larvae of cotton bollworm showed uniform distribution in summer maize. Iwao regression equation of fourth-generation mature larvae of cotton bollworm in summer maize was m * =0. 090 6 +0. 766 9m, r =0.986 3, indicating that the basic components of cotton bollworm distribution was single individual, and mature larvae of cotton bollworm in summer maize showed uniform distribution. The optimal sampling number of fourth-generation mature larvae of cotton bollwonn in maize under different population densities could be calculated using formula N1 =( 1. 090 6/m - 0. 233 1 )/D2. [ Conclusion ] The result provided basis for accurate evaluation of population quantities and variation law of cotton bollworm, as well as prediction and control of the pest.关键词
玉米/棉铃虫幼虫/空间分布型/抽样技术Key words
Maize/ Cotton bollworm/ Spatial distribution pattern/ Sampling technique分类
农业科技引用本文复制引用
李贺年,齐巧丽,李德新,姚克荣..玉米田四代棉铃虫老熟幼虫空间分布型应用[J].安徽农业科学,2011,39(19):11504-11505,2.
