First Report of Powdery Mildew on <i>Corylus avellana</i> caused by <i>Phyllactinia guttata</i> in Washington State

Fig. 2. Penicillate cell produced by P. guttata viewed with brightfield microscopy.



Image from Plant Health Progress article:
First Report of Powdery Mildew on Corylus avellana caused by Phyllactinia guttata in Washington State