棚室韭菜在生产过程中经常出现干尖、死株和茎叶腐烂等病害症状,但是相同症状的发病原因不一定相同,正确判断其发生原因并及时采取有效防治措施是栽培的关键。一、干尖1.土壤酸化引起。长期大量施入粪稀、饼肥和其他酸性肥 Leek in the greenhouse often appear in the production process dry tip, dead and stems and leaves and other symptoms of disease, but the same symptoms may not be the same cause of the disease, to determine its causes and timely and effective prevention and control measures are the key to cultivation. First, dry tip 1. Soil acidification caused. A large number of long-term application of manure, cake and other acidic fertilizer