| 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 |
| |
| 引用本文： | 来有鹏,张登峰,咸文荣.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[J].昆虫知识,2012,49(2):526-528. |
| |
| 作者姓名： | 来有鹏 张登峰 咸文荣 |
| |
| 作者单位： | 青海省农林科学院植物保护研究所 西宁810016 |
| |
| 基金项目： | 青海省重点科技攻关项目 |
| |
| 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。
|
| 关 键 词： | 茴香薄翅野螟 虫口密度 油菜产量损失 防治指标 |
The relationship between the population density of Evergestis extimalis rape yield loss and control index |
| |
| LAI You-Peng
,
ZHANG Deng-Feng
,
XIAN Wen-Rong.The relationship between the population density of Evergestis extimalis rape yield loss and control index[J].Entomological Knowledge,2012,49(2):526-528. |
| |
| Authors: | LAI You-Peng ZHANG Deng-Feng XIAN Wen-Rong |
| |
| Institution: | LAI You-Peng ZHANG Deng-Feng XIAN Wen-Rong (Institute of Plant Protection,Qinghai Academy of Agricultral and Forestry Science,Xinig 810016,China) |
| |
| Abstract: | 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. |
| |
| Keywords: | Evergestis extimalis population density rape yield loss control index |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
