春西红柿黄瓜苗期主要病害的防治方法一、猝倒病又叫绵腐病、卡脖烂。幼苗刚出土到长出２片真叶前为易感病期。主要症状：一是种子出苗前烂种；二是幼苗出土后茎基部出现水浸状暗色病斑，逐渐扩大后至绕茎一周时就会导致茎部腐烂或干缩变细，叶片萎蔫，幼苗倒伏，植株死亡... Spring tomato cucumber seedling disease prevention and treatment methods First, the damping-off disease, also known as cotton rot, card neck rotten. Seedlings have just unearthed to grow 2 really leaves for the susceptible period. The main symptoms: First seed before emergence of rotten species; second seedling emerging stem base after the emergence of flooding-like dark spots, gradually expanded to around the stem will lead to stem rot or shrinkage thinner, leaf wilting, seedling Lodging, plant death ...