First Report of Powdery Mildew of <i>Mahonia aquifolium</i> (Pursh.) Nutt. Caused by <i>Erysiphe</i> (<i>Microsphaera</i>) <i>berberidis</i> (DC.) Lév in Canada

Fig. 3. Powdery mildew infection of Mahonia aquifolium on berries.



Image from Plant Health Progress article:
First Report of Powdery Mildew of Mahonia aquifolium (Pursh.) Nutt. Caused by Erysiphe (Microsphaera) berberidis (DC.) Lév in Canada