Downy mildew typically appears as greyish white downy patches on the undersides of leaves and dark patches on upper surfaces.
Typically downy mildew appear as greyish white downy patches on the undersides of leaves and dark patches on upper surfaces. Other symptoms of downy mildew are distorted growth and dead leaves and shrivelled leaves. Downy mildew causes blight in seedlings. Downy mildew can cause rapid loss of leaves and consequent stress to affected plants.
Common hosts for downy mildew include roses, brassicas, grape vines, hebes, lettuces, peas, and roses.
Powdery mildew has similar symptoms but the grey powdery patches will tend be on the upper surfaces of leaves.
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