小麦黄矮病是我区小麦生产的重要病害,主要分布于渭北旱原、高原,尤以合阳乳罗山、大荔铁链山、澄县刺沟、蒲城紫金原、尧山,富平梅家坪等山原阳坡地带发病严重,且时间早。1960. 70、73、78、80年曾五次大流行,危害成灾,损失严重。近年就以下问题作了调查。一、黄矮病与麦蚜消长的关系我们曾在温室用饲毒后的二又蚜接在无病麦苗上(一苗一虫)作试验,结果接虫的发病 Wheat yellow dwarf disease is an important disease of wheat production in our district, mainly distributed in the Weibei drylands, plateau, especially in the Heyang Lushan Mountain, Dailieshan Mountain, Cheng County Cigu, Pucheng Zijin, Yaoshan, Fuping, such as the homeland Pingyang Yang slope strip serious illness, and time is early. 1960. There were five pandemics in 1970, 73, 78 and 80, endangering the disaster and causing serious losses. In recent years, the following questions were investigated. First, the relationship between yellow dwarf disease and the growth and decline of wheat aphid We used in the greenhouse with the two aphids after feeding on the disease-free wheat seedlings (a seedling a worm) for the test results pick the incidence of