The viscid dot appears on the front of blade, when it is moist, and change into black at the time of the dryness;
叶片病斑初为暗褐色小点，后扩大成黑褐色圆斑，潮湿时在叶片正面产生橘红色粘质小点，干燥时转变为黑色；
The viscid dot appears on the front of blade, when it is moist, and change into black at the time of the dryness;
叶片病斑初为暗褐色小点，后扩大成黑褐色圆斑，潮湿时在叶片正面产生橘红色粘质小点，干燥时转变为黑色；
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