芹菜叶斑病又称早疫病、斑点病,是保护地栽培中芹菜的主要病害。1症状植株上部分均可发病,主要为害叶片,也可为害叶柄和茎。病叶最初出现黄绿色水渍状斑点,逐渐变为褐色或暗褐色,病斑稍圆,边缘黄色,病斑大小4~10 mm;严重时叶柄和茎上病斑为水渍状圆斑或条斑,渐变为暗褐色,稍凹陷;高温多湿时,病斑表面生白色或紫色霉状物。发病严重 Celery leaf spot, also known as early blight, spot disease, is the main disease in cultivated celery. 1 symptoms can be part of the disease on the plant, the main damage to the leaves, pests and stems can also be harmful. The diseased leaves first appeared yellow-green water-like spots, gradually turned brown or dark brown, slightly rounded lesions, the edge of the yellow, the lesion size 4 ~ 10 mm; severe petiole and stem spots on the water stains or spots Streaks, gradient dark brown, slightly depressed; hot and humid, the lesion surface white or purple mildew. Seriously