1　立枯病　辣椒苗期的主要病害之一 ,小苗和大苗均能发病 ,但一般多发生在育苗的中后期。发病时病苗茎基部产生椭圆形暗褐色病斑 ,早期病苗白天萎蔫 ,夜间恢复 ,随后病斑逐渐凹陷 ,并扩大绕茎一周 ,有的木质部暴露在外 ,最后病灶收缩 ,植株死亡。属真菌病害 ,以菌丝体或菌核残 A blight pepper seedling one of the major diseases, seedlings and seedlings can disease, but generally occur in the mid-late nursery. Sick at the onset of the base of the disease stems produce oval dark brown lesions, the early seedling wilting during the day and night recovery, and then lesion gradually hollowed out and expanded around the stem a week, some xylem exposure, and finally the lesion shrinks, plant death. A fungal disease to mycelium or sclerotia