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春植豆角容易受蚜虫为害 ,使顶部生长点停止生长 ,叶片失绿黄化 ,导致新芽不长 ,花蕾不发 ,不能开花结荚 ,还会诱发病毒病 ,使植株萎缩畸形。具体防治方法 :在豆角长出２～３片真叶 ,顶芽开始向上生长时 ,注意检查叶片和顶端幼嫩茎叶 ,发现有少量蚜虫吸附在茎叶上时 ,就要喷药
Spring planting beans susceptible to aphids damage, so that the top of the growth point to stop growing, the leaves lost green, resulting in new shoots are not long, buds do not send, can not blossom pods, but also induced virus disease, so that plant shrinkage deformity. Specific methods of prevention and treatment: in the beans grow 2 to 3 true leaves, top buds began to grow upward, pay attention to check the leaves and the top of young stems and leaves, found a small amount of aphids adsorbed on the stems and leaves, it is necessary to spray