单词sooty mold
na.: 【生】烟霉(菌)网络: 煤病;煤烟病;黑煤病
【生物学】烟霉(菌)
Here you see a typical cucumber leaf that turned actually from green to black because of a black fungus, sooty mold, which is covering it.
你可以看见典型的黄瓜叶子因为覆盖在上面的黑色真菌以及乌黑的霉菌让它从绿色变成了黑色。