本试验从品种、苗床覆盖薄膜时间、连轮作条件、土壤消毒、药剂和系统处理等方面进行了苗期猝倒病流行因素和防治研究.结果表明:品种抗感差异明显;覆膜时间和连作年限与发病率成正相关;阐明了栽培措施和药剂处理相结合的综合防治措施.为防治猝倒病,提供了重要的实践经验. In this experiment, the epidemic factors and control measures of seedling damping-off disease were studied in terms of variety, seedling cover film time, continuous cropping condition, soil disinfection, medicament and system treatment. The results showed that the varieties had obvious anti-sense difference; The relationship between years and incidence was positively correlated, and comprehensive prevention and control measures were put forward, which combined cultivation measures and medicament treatment, and provided important practical experiences for preventing and treating damping-off disease.