黄瓜黑腥病是影响黄瓜产量和品质的重要病害,大棚和温室黄瓜最易感病。叶片染病初期产生污绿色圆形斑点,几天后斑点破裂穿孔,孔的边缘不整齐并有黄色晕圈。瓜蔓和叶柄形成中间凹陷的疮痂状病斑,病斑上常生有黑色霉层。瓜条染病后,病部流出乳白色或淡黄色胶状物,后形成暗绿色凹 Black gourd is cucumber cucumber yield and quality of the important diseases, greenhouse and greenhouse cucumber susceptible to the most susceptible. The leaves developed a faintly green round spot in the early stages of the disease, and after a few days the spots burst and perforation, the edges of the holes were irregular and had a yellow halo. Melon and petiole form the middle of the depression of the scab-like spot, spot on the black moldy layer. Guajiang disease, the Department of outflow milky white or light yellow jelly, dark green after the formation of concave