摘要： 实验和田间调查结果表明:麦长管蚜有苗型蚜和穗型蚜两种生态型.穗型蚜是适应高温而产生的生态型,有两种典型的体色——桔红色和绿色,在这二者之间有过渡色——黄绿色,且桔红色穗型蚜是由绿色穗型蚜产生黄绿色穗型蚜,再由黄绿色穗型蚜而产生的.苗型蚜的最适温区为15～20℃,而穗型蚜的最适温区为24～26℃.同时,穗型蚜也是麦长管蚜越夏的主要蚜型(占96%左右).

关键词: 麦长管蚜, 生态型, 体色, 温度

Abstract: The results of field investigation and experiment showed that the S. avenae had two kinds of ecotype,i.e.ear-type and seedling-type.The ear-type aphid is only an ecotype adapting high temperature, which has two kinds of typical body color: (1) orange-red, and (2) greenish, Meanwhile there is an intermediate colored one the yellowish-green. The orange-red aphids are produced from the yellowish-green aphids which are from the green ones. The range of optimal temperature is from 15-20℃ for seedling-type aphids, and from 24-26℃ for ear-type ones which are the major type of S. avenae for overwintering (account for 96%).

Key words: Sitobion avenae F., Ecotype, Body color, Temperature