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枯萎病的病菌可在土壤中存活5～6年,甚至达10年以上。该病菌可以通过带菌种子、土壤、肥科、灌溉水、昆虫、农具等传播到很远的地方。排水不良及雨后积水,使根系发育不良,植株生长势减弱,有利于病菌的侵入和繁殖,促使病害加重。酸性土壤(pH4.5～6),在生产中氮肥过量,磷钾肥不足,施用未充分腐熟的带菌有机肥,或土壤中含钙量高,黄守瓜及地下害虫为害重,均易诱发此病。
Fusarium wilt bacteria can survive in the soil 5-6 years, or even up to 10 years. The bacteria can be spread far and far through contaminated seeds, soils, fertile families, irrigation water, insects, farm tools and the like. Poor drainage and water after the rain, the root system dysplasia, plant growth potential weakened, conducive to the invasion and reproduction of bacteria, to promote disease. Acid soil (pH4.5 ~ 6), in the production of excessive nitrogen, phosphorus and potassium deficiency, the application of not fully decomposed with organic fertilizer, or high calcium content in soil, yellow Shougua and underground pests damage, are easy to induce the disease.