Uncinula macrospora is a plant pathogen that causes a powdery mildew disease of certain North American trees. Its hosts include various elms (Ulmus spp.), hackberries (Celtis spp.), and American hop hornbeam Ostrya virginiana.
Uncinula macrospora is a plant pathogen that causes a powdery mildew disease of certain North American trees. Its hosts include various elms (Ulmus spp.), hackberries (Celtis spp.), and American hop hornbeam Ostrya virginiana.