摘要
本文研究了第４代棉铃虫百株不同３龄幼虫量与春直播棉、麦套夏棉产量损失率的关系，分别组建了它们的相关式。测定了在不同棉花产量水平下的防治指标。分析提出推广这两种种植方式棉花的防治指标分别为百株３龄幼虫１０头和１２头。
The regression equations between the number of the third instar larvae of the 4thgeneration cotton bollworm. Heliothis armigera Hubner and the yield loss of springdirect-sown cotton and summer cotton interplanted with wheat were established.Based onthese equations. the control number of the pest on the two types of cotton were 10 and 12per 100 plants respectively.
出处
《山东农业大学学报（自然科学版）》
CSCD
1995年第4期435-437,共3页
Journal of Shandong Agricultural University：Natural Science Edition
基金
山东省科委下达的"棉铃虫大发生机制和防治对策研究"课题
关键词
棉花
第4代棉铃虫
防治
指标
棉铃虫
cotton
4th generation of Heliothis armigera Hubner
control index
