韭菜白绢病在保护地韭菜生产中为多发生。种植密度大、通风透光不好发病重。土壤黏重、偏酸,多年重茬,田间病残体多,氮肥施用太多,生长过嫩,肥力不足,耕作粗放,杂草丛生的田块,植株抗性降低,发病重。种子或种根带菌、肥料未充分腐熟、有机肥带菌或肥料中混有本科作物病残体的易发病。地势低洼积水、排水不良、土壤潮湿易发病。高温、高湿、多雨、日照不足易发病。大棚栽培的,往往为了保温 Chive sclerotinia in the protection of leek production occurs frequently. Planting density, poor ventilation and light incidence. Soil sticky, acid, multi-year cropping, field sickness and more nitrogen fertilizer too much, over-fertilization, fertility, extensive farming, overgrown fields, plant resistance decreased, the incidence of heavy. Seed or root-borne bacteria, fertilizer is not fully decomposed, organic fertilizer or fertilizer mixed with undergraduate crop disease prone to disease. Low lying water, poor drainage, soil moisture prone to disease. High temperature, high humidity, rainy, less prone to sunshine. Greenhouse cultivation, often in order to keep warm