downy mildew


downy mildew

noun

Definition of DOWNY MILDEW

1
:  any of various parasitic lower fungi (family Peronosporaceae) that produce whitish masses of sporangiophores or conidiophores on the undersurface of the leaves of the host
2
:  a plant disease caused by a downy mildew

First Known Use of DOWNY MILDEW

1886

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