论文部分内容阅读
苕子Vicia cracca L.是川西平原主要绿肥饲料作物。苕蛆Dasyneura Viciae(Kieffer)属双翅目,瘿蚊科,是川西苕子上的一大害虫,发生猖獗,以幼虫为害苕子心叶,被害叶形成饺子状的虫瘿。每一瘿内藏幼虫4—18头不等。羽状复叶被害后,扭结成一虫瘿团,颜色淡绿,使苕子生长停滞,由瘿最后于缩腐烂,对苕青和苕籽产量影响甚大。当严重发生时,其心叶被害率可达100％,而籽种产量由原亩产140斤降至30斤。
Vicia cracca L. is the main green manure crop in the western Sichuan Plain. Dasyneura Viciae (Kieffer) is a family of Diptera, Culicidae, which is a major pest on the prickly heat of Chuanxi. Its occurrence is rampant. There are 4-18 larvae within each larvae. Pinnate compound leaf victims, kinked into a wormwood group, light green color, so that the growth of the stamens stagnation, from the final collapse in the decay, on the chingqing and chia seed yield a great impact. When serious occurs, the damage rate of its heart leaves up to 100%, while the seed yield reduced from 140 kg per mu to 30 kg.