First Report of Powdery Mildew on <i>Caragana arborescens</i> and <i>Caragana grandiflora</i> in Alaska caused by <i>Microsphaera</i> (<i>Erysiphe</i>) <i>palczewskii</i>

Fig. 1. Appressorium (arrow) on leaf surface of M. palczewskii.



Image from Plant Health Progress article:
First Report of Powdery Mildew on Caragana arborescens and Caragana grandiflora in Alaska caused by Microsphaera (Erysiphe) palczewskii