棉铃疫病(Phytophthora boehmeriae Sawada.)是上海郊区棉花烂铃的主要病害。通过对棉铃疫病菌的生物学特性和发生条件等研究,明确了土壤中病铃壳上的厚垣孢子是其主要越冬形态和来年疫病的侵染源。棉铃疫病发生的气候因子和棉株营养指标,可作为预测的依据。并对防治途径进行了探讨。敌菌丹、福美双、亚磷酸乙酯铝有较好的防治效果。 Phytophthora boehmeriae Sawada. Is a major disease of cotton bolls in the suburbs of Shanghai. Through the study of the biological characteristics and occurrence conditions of the disease, it is clear that Chlamydospores are the main source of overwintering and the source of infection in the coming year. The climatic factors of cotton bollworm disease and nutritional indicators of cotton plant can be used as the basis of prediction. The ways of prevention and cure were also discussed. Fusidan Dan, the United States double, ethyl aluminum phosphite have a better control effect.