First Report of Powdery Mildew of <i>Magnolia</i> caused by <i>Microsphaera magnifica</i> (<i>Erysiphe magnifica</i>) in the Pacific Northwest

Fig. 1. Symptoms of powdery mildew on Magnolia liliifolia.



Image from Plant Health Progress article:
First Report of Powdery Mildew of Magnolia caused by Microsphaera magnifica (Erysiphe magnifica) in the Pacific Northwest