茴香薄翅野螟虫口密度与油菜产量损失关系及其防治指标的研究  

The relationship between the population density of Evergestis extimalis rape yield loss and control index

作　　者：来有鹏[1] 张登峰[1] 咸文荣[1] 

机构地区：[1]青海省农林科学院植物保护研究所,西宁810016

出　　处：《应用昆虫学报》2012年第2期526-528,共3页Chinese Journal of Applied Entomology

基　　金：青海省重点科技攻关项目(2007-N-113)

摘　　要：在网室内人工接茴香薄翅野螟Evergestis extimalis Scopoli卵,研究结果表明,随着幼虫数量的增加,油菜产量损失增加;与对照相比,当接卵数为216、399、858、1665和3279粒时,产量损失分别达3.13%,2.08%,12.5%,25.10%和43.33%。各网室实际接虫数(x)与其相应的小区油菜产量(y)的关系为:y=-0.0007x+4.8129,表明虫口密度与油菜产量为负相关。在青海省油菜种植区内每平米幼虫或卵数超过10头或粒时,应即时防治。Rape yield loss increased with the number of Evergestis extimalis Scopoli eggs experimentally placed on plants in a net room.Egg numbers of 216,399,858,1 665 and 3 279 per plant,resulted in loss rates of 3.13%,2.08%,12.5%,25.10% and 43.33%,respectively,compared to the control.The relationship between egg number and rape yield was y =-0.0007x ＋4.8129,which indicates a negative relationship.E.extimalis should be controlled when the density of larvae or eggs reaches 10 individuals/m2 in Qinghai planting fields.

关 键 词：茴香薄翅野螟 虫口密度 油菜产量损失 防治指标 

分 类 号：S435.654[农业科学—农业昆虫与害虫防治]