论文部分内容阅读
1 为害大豆蚜虫具有趋嫩的习性。以成虫和若虫在大豆植株的生长点、顶叶嫩叶及嫩茎上刺吸汁液,严重时布满茎叶,幼叶也被为害,造成叶片卷缩,发黄,植株矮小,根系发育不良,分枝及结荚的数量减少,百粒重下降,产量降低,甚至整株死亡。一般田块减产
1 damage soybean aphids with tender habits. In adults and nymphs in the growth of soybean plants, the top leaves and tender stems sucking juice, severe accumulation of stems and leaves, young leaves are also damaged, causing the leaves curling, yellowing, short plants, root dysplasia , The number of branches and pods decreased, the weight of grains dropped, the yield decreased, and even the whole plant died. General field production cuts