辽宁农业科学Issue(4)：80-82,3.DOI:10.3969/j.issn.1002-1728.2017.04.020
辽宁省稻水象甲种群动态分析
Population Fluctuation and Its Causes of Rice Water Weevil,Lissorhoptrus oryzophilus in Liaoning Province
李志强 1田春晖 1于凤泉 1赵旭 1孙富余1
作者信息
- 1. 辽宁省农业科学院植物保护研究所,辽宁 沈阳 110161
- 折叠
摘要
Abstract
This paper mainly analyzed the occurrence of rice water weevil,Lissorhoptrus oryzophilus on popula-tion density in two decades combined with the survey data. Only several years were requried from the detecta-ble level to economic injury level (EIL)in the field,and ten years were needed to reach the highest popula-tion density;subsequently,most area fall to the EIL,but partial heavy area declined to an extremely low lev-el. Base on the fluctation theory of insect,the principal reason of the population density decline among heavy area is under a high stress of chemical control year after year,the constraint factors such as the amount of nat-ural enemy regulate the rice water weevil and they both reach an ecological balance;In most cases,the meet with high temperature and low humidity during adult overwintering period is adverse for the survival rate;smooth and steady fluctation in a low density status is chosen by local biological characters in some other area. In brief,we forecast that the rice water weevil of Liaoning Province could outbreak again in the years to come, if still under a status of sustained loose and comfortable chemical control.关键词
稻水象甲/种群波动/防治压力Key words
Rice water weevil/Lissorhoptrus oryzophis/Population fluctuation/Pressure control分类
农业科技引用本文复制引用
李志强,田春晖,于凤泉,赵旭,孙富余..辽宁省稻水象甲种群动态分析[J].辽宁农业科学,2017,(4):80-82,3.
