随着城市郊区蔬菜生产的发展，冬季育苗由于气温偏低，光照不足，苗期病害也发生了明显的变化。苗期病害种类增加，发生期提前，危害程度加重。除常见的摔倒病、番茄早疫病、辣椒炭疽病、茄子揭纹病等苗期病害外，原不多发的辣椒疫病和黄瓜疫病已成为主要病害。因此，加强革床? With the development of vegetable production in suburban areas of the city, winter seedling emergence due to low temperatures, lack of light, seedling diseases have undergone significant changes. Seedling disease increased, the occurrence of an earlier stage, increasing the degree of harm. In addition to the common fall disease, tomato early blight, pepper anthrax, eggplant germ disease and other seedling diseases, the original peppers disease and cucumber disease has become the main disease. Therefore, to strengthen the leather bed?