该病是细菌性病害,主要危害叶片、叶柄和幼瓜,整个生长时期均可为害。苗期感病子叶呈水浸状黄色凹陷斑点,叶片感病初期叶背为浅绿色水浸状斑,渐渐叶面变成浅褐色坏死病斑,干燥后病斑部位脆裂穿孔。要预防该病,首先要清除病株 The disease is a bacterial disease, the main hazards leaves, petioles and cucumbers, the entire growth period can be harmful. The senescence seedling leaves showed water-soaked yellow-concave spots. The early leaves of the leaves showed light green flooding spots, and gradually turned into light brown necrotic lesions. After drying, the spots of lesions were brittle and perforation. To prevent the disease, we must first clear the diseased plants