摘要
本文采用平均密度(X),聚块性指标(m/m)和有蚜株率(F)对小麦禾缢管蚜种群动态进行模糊聚类分析。找出了其种群消长的4个时期:点片发生期,始盛期,猖獗期和衰退期;防治重点应在始盛期,即瓢虫卵期,以达到经济有效,充分保护利用天敌的目的。
We discovered four critical times to describe population fluctuation of
Rhopalosiphum padi by fuzzy cluster analysis of population dynamics, that is pest patch
emerging period,early peak period, surgence and decay period. It’s control should be intensive
during early peak period,synchronous to egg stage of coceinellids,so that economic tenefit can be
reach at maximum, and natural enemies can be protected without harm from insecticides.
出处
《植物保护》
CAS
CSCD
北大核心
1995年第2期5-7,共3页
Plant Protection
关键词
小麦
麦蚜
禾缢管蚜
种群动态
模糊聚类分析
wheat, Rhopalos phum padi, population dynamics, fuzzy cluster analysis.