1991年黑龙江省小麦生长期雨日和雨量比历年同期较多,小麦的各种病害都有所抬头,同时还发现一种过去未见报道对小麦具严重威协的病害。 该病在小麦抽穗以后出现发病中心,并逐渐向四周扩展,成片。发病后颖壳变褐,穗芒不张开,穗颈变褐,籽粒干瘪,严重罹病的,千粒重仅十余克。我们对该病进行了初步调查,在我们的鉴定圃中,调查了568份材料,发病的有445份,发病率为78.34％:本院作物所小麦育种地及辐射育种地也都有此病发 In 1991, the rainy days and rainfalls of wheat growing season in Heilongjiang Province were more than those in the same period of last year. All kinds of diseases of wheat were on the rise. At the same time, there was also found a disease that had not been reported to have a serious threat to wheat in the past. The disease appears after the heading of wheat center of disease, and gradually expanded to the surrounding, into a film. After the onset of glume brown, spike does not open, panicle neck brown, dry grain, severe illness, thousand weight only ten grams. We conducted a preliminary survey of the disease. In our identification garden, 568 materials were investigated, of which 445 were morbidly associated with a morbidity of 78.34%. Our hospital also has the disease in both wheat breeding and radiation breeding hair