一、蚜虫类蚜虫多聚集在苜蓿的嫩茎、叶、幼芽和花各部位上,以刺吸口器吸取汁液,被害植株叶子卷缩,蕾和花变黄脱落,并影响生长发育、开花结实和牧草产量,发生严重时,田间植株成片枯死。苜蓿蚜虫害分布于新疆、甘肃、内蒙古、宁夏、山东、河南、广东、广西、福建、湖南、湖北和 First, aphids and more aphids gathered in the tender stems, leaves, buds and flowers of alfalfa various parts of the sucking mouth to suck the juice, the victim leaves curling, buds and flowers turn yellow, and affect the growth and development, flowering and fruiting And pasture production, when serious, field plants die into pieces. Alfalfa aphids distributed in Xinjiang, Gansu, Inner Mongolia, Ningxia, Shandong, Henan, Guangdong, Guangxi, Fujian, Hunan, Hubei and