摘要
对四川盆地21世纪开始以来各年春季气温变化、小麦禾谷缢管蚜及其天敌发生情况进行了分析。结果表明,以2、3月为中心的春季气温时段性显著变暖,激活了以多种瓢虫为主的天敌,使其发生期提早、发生量增加、捕食时间加长,从而在最关键的穗期前、中期显著增强了天敌的控制力,最终导致小麦禾谷缢管蚜的发生呈现时段性衰减。
Occurrence of wheat Rhopalosiphum padi, its natural enemy and temperature change of every spring in Sichuan province have been analyzed since 2000, results indicated that spring temperature getting much warmer in Feb. and Mar. activated Rhopalosiphum padi＇s natural enemy, made it occurred earlier, population increased, and preying period lengthened, and improve its control efficiency, which resulted in periodical reduction of Rhopalosiphum padi.
出处
《中国植保导刊》
北大核心
2009年第5期9-11,共3页
China Plant Protection
关键词
春季气温
禾谷缢管蚜
衰减
spring temperature
Rhopalosiphum padi
reduction
