grape mildew

noun

Definition of grape mildew

1 : a powdery mildew caused by an ascomycetous fungus (Uncinula necator)
2 : a downy mildew caused by a phycomycetous fungus (Plasmopara viticola)

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Learn More About grape mildew

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Cite this Entry

“Grape mildew.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/grape%20mildew. Accessed 28 Nov. 2021.

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