芹菜斑枯病主要发生在叶子上,叶柄和茎部也可发病。一般先在老叶上发病,逐渐传到新叶上。病斑症状初生为淡黄色椭圆形或近圆形,逐渐变为灰褐色,边缘较深,表面散生许多小黑点,在病害初发阶 Celery blight occurs mainly in the leaves, petiole and stem can also be disease. Generally the first onset in the old leaves, and gradually spread to the new leaves. Symptoms of lesion primary pale yellow oval or nearly circular, gradually turned gray-brown, darker edge, surface scattered many small black spots in the initial stages of disease