番茄苗期病害发生与防治番茄苗期主要病害是“猝倒病”和“立枯病”两种。猝倒病的发生期早，在幼苗尚未出土时，胚茎和子叶即受危害而腐烂，幼苗发病时，茎基部先呈水渍状后变黄褐色，最后茎基缩呈线状。猝倒病发病速度快，往往叶子还未凋萎，而幼苗即已猝倒，成片倒苗。... Occurrence and control of tomato seedling diseases The main diseases of tomato seedling stage are “damping-off disease” and “damping-off disease”. Damp down occurs early, when the seedlings have not yet unearthed, the embryo stems and cotyledons that are harmed and decayed, the incidence of seedlings, the base of the first water-like brownish-yellow after the end of the stem-based contraction was linear. Damp down disease onset rate, often leaves have not wilted, and seedlings that have catapulted into a piece of inverted seedlings. ...