First Report of Powdery Mildew on Potato Caused by <i>Leveillula taurica</i> in North America

Fig. 4. Short-cylindrical to ovoid conidia of Erysiphe orontii (E), and cylindrical and lanceolate conidia of Leveillula taurica (L) viewed with brightfield microscopy.



Image from Plant Health Progress article:
First Report of Powdery Mildew on Potato Caused by Leveillula taurica in North America