问:代代花有哪些病害,怎样防治? 读者庄重熹答代代花主要病害有溃疡病和疮痂病。溃疡病是细菌性病害,传染媒介主要是风雨和昆虫。病菌在植株的病斑上越冬,四月开始繁殖,五至九月危害植株,一般在新枝上发病,夏梢发病最多。受害严重的叶 Q: What are the diseases on behalf of the generation of flowers, how to prevent? The solemn generation of flowers readers Xianyuhua main diseases are ulcer disease and scab. Canker disease is a bacterial disease, the vector is mainly wind and rain and insects. Pathogens in the plants overwinter on the lesion, April began breeding, from May to September endanger the plant, the general incidence of the new branches, summer shoots the most incidence. Seriously affected leaves