一、大蒜叶枯病 大蒜叶枯病发生于叶片和花梗上。叶片发病多由叶尖开始扩展蔓延,病斑初期为花白色小圆点,扩大后呈不规则形状或椭圆形,灰白色或灰褐色,病部生黑色霉状物,严重时病叶枯死。如花梗受害,容易从病部折断,最后在病部散生出许多黑色小点粒。 First, garlic leaf blight Garlic leaf blight occurred in the leaves and pedicels. Leaf blade onset began to spread more spread from the tip of the lesion early flower small dots, expanded irregularly shaped or oval, gray or gray-brown, sick parts of black mildew, sick leaves died in severe cases. If the pedicle damage, easy to break from the disease, and finally scattered in the sick area many black dots.