Powdery mildew


Powdery mildew. The mildew has germinated on the underside of an apple tree leaf. Enhanced scanning electron micrograph (SEM) of spores of a powdery mildew fungus (Mycotypha africana). Powdery mildew is a common plant disease caused by a numerous fungi. The name "powdery" mildew refers to the appearance of an infected plant. When infected, the leaves that look as if they have been dusted with powder. Magnification: w=140.0 micrometers.

Credit: SCIMAT / Science Source

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