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韭菜栽培方式现已由露地季节栽培转向保护地周年栽培,又从单作改向与几种作物间作套种,从而带来了许多新病害大发生。为搞好韭菜的病害防治工作,这里对其各种病害的症状与防治分别介绍如下:1.灰霉病该病危害叶片,开始产生白色至灰褐色斑点,由叶尖向基部发展,逐渐扩大成棱形或椭圆形。潮湿时,表面生有稀疏霉层。严重时,病斑连成片,
Leek cultivation has now been switched from the open season cultivation to the protection of the annual planting, but also from a single cropping intercropping with several crops, resulting in a large number of new diseases occurred. In order to improve the disease prevention and treatment of leeks, the symptoms and prevention of various diseases here are described as follows: 1. Botrytis cinerea The disease endangered leaves, began to produce white to brown spots, from the tip to the base of the development and gradually expand Into a prism or oval. When wet, the surface is sparse mildew layer. Seriously, the lesion into pieces,