辽宁朝阳地区高粱蚜田间消长规律及防治适期  

Field population dynamic and optimum control period of Melanaphis sacchari in Chaoyang region,Liaoning.

作　　者：李学军[1] 王淑贤[1] 郑国[1] 孙慧敏[1] 张广学[1,2] 

机构地区：[1]辽宁省高校生物系统进化与农业生态重点实验室沈阳师范大学 [2]中国科学院动物研究所北京100080

出　　处：《昆虫知识》2007年第1期53-57,共5页Entomological Knowledge

基　　金：农业部全国农作物病虫测报网朝阳区域站资助。

摘　　要：对辽宁省朝阳地区1989～2001年13年的高粱蚜Melanaphis sacchari（Zehntner）的系统调查资料分析结果表明，该地区高粱蚜为间歇性发生，发生频率为60％左右。在不施农药的自然情况下，田间发生表现6个阶段，消长规律明显。中等发生年一般峰期日平均百株蚜量5～15万头，严重年25～60万头。各年度田间百株蚜量与蚜虫天敌单位呈极显著相关，天敌紧密跟随蚜虫。防治适期为7月25日～8月5日，个别发生较早的年份可以提前2—3d。Analysis of systematic investigation of Melanaphis sacchari（Zehntner） field population in Chaoyang region of Liaoning Province from 1989 to 2001 shows that the occurrence of the aphid was intermittent, and the infestation frequency was about 60%. Under the conditions without utilizing pesticide, the occurrence of the aphid population shows six stages, with distinct growth and decline regulation. The mean population size is 50 000 - 150 000 per 100 shoots of sorghum in the peak period in moderate occurrence years, and it can reach to 250 000 - 600 000 on serious occurrence years. The aphid population size each year had a significant correlation with the number of natural enemies. Natural enemies followed the aphid closely. The optimum control period is from July 25 to August 5, which can be shifted to 2 or 3 days earlier in special years.

关 键 词：高粱蚜 发生阶段 消长规律 防治适期 

分 类 号：S435.14[农业科学—农业昆虫与害虫防治]