麦水蝇是我县近年来才发生的一种新害虫,发生面积占播种面积的30%以上,被害株由1975年的24%上升为55%,危害严重的麦田高达80.4%,千粒重下降5.2—11.6%,受害麦田每亩损失产量26—121斤。为了摸清麦水蝇在我县的发生规律,从1975年至1979年,除了定期定田系统调查和饲养92组观察外,还结合进行了全县多点大田普查,现初步整理如下。 As a new pest occurred in our county in recent years, the occurrence of wheat-water flies was over 30% of the sown area. The number of infected plants increased from 24% in 1975 to 55%, that in the severely damaged wheat fields was as high as 80.4%, and the grain weight decreased by 5.2% -11.6%, damage wheat yield per mu yield 26-121 kg. In order to find out the occurrence of wheat-water flies in our county, from 1975 to 1979, in addition to the regular field system survey and feeding 92 groups observed, but also combined with the county more field census, are initially sorted as follows.