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加强病虫草害的防治是确保莲藕稳产高产的首要环节。一、病害防治莲藕主要病害为叶枯病和枯萎病。叶枯病:叶片(藕叶)一经感染,叶片边缘表面首先呈现黄色病斑,以后则变深褐色枯死,且向叶片中心蔓延,由叶肉扩展到叶脉,最后全叶枯死。而枯萎病发生时,地上藕叶则出现青枯,叶片边缘会向上卷曲,最后全叶枯萎;花蕾受害则枯
Strengthen the prevention and control of pests, weeds and weeds is the most important link to ensure stable and high yield of lotus root. First, disease prevention and control The main diseases of lotus root blight and blight. Leaf blight: Once the leaf (lotus leaf) is infected, the leaf edge surface first presents a yellow lesion, then becomes dark brown and dies, and spreads to the center of the leaf blade. It expands from the leaf to the leaf vein, and finally the whole leaf dies. Fusarium wilt occurs when the lotus root lotus is withered, the leaf edges curl up, and finally the whole leaf wilted; flower buds are dead