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近两年,温室韭菜疫病有蔓延趋势,对韭菜冬茬生产造成很大威胁,应及时进行防治。该病菌属于弱寄生菌,主要靠流水传播为害。发病初期,叶尖出现一些针尖大小黄圆点,最后病斑连成片,严重时使 叶子枯黄干死,影响韭菜的产量和品质。其主要防治措施是: 1.小水勤浇 疫病靠水流传播,如大水漫灌,由于韭菜根部吸水能力差,很容易造成室内湿度过大,使疫病流行蔓延。此外,追肥时要注意追施
In the past two years, greenhouse leek epidemic has the tendency to spread, causing serious threat to the production of leek winter stubble and should be timely prevention and treatment. The bacteria belong to weak parasites, mainly spread by water damage. Early onset, there are some tip-tip yellow dots, the last film even into pieces, making the leaves dry in severe cases, affecting the yield and quality of leeks. The main control measures are: 1. Shuiqiu vaccination by the spread of water flow, such as flood irrigation, due to poor water absorption capacity of the roots of leeks, it is easy to cause excessive indoor humidity, epidemic spread. In addition, top-dressing should pay attention to chase