First Report of Powdery Mildew of <i>Convolvulus arvensis </i>(Field Bindweed) Caused by <i>Erysiphe convolvuli</i> var. <i>convolvuli</i> in North America

Fig. 4. Conidium formed by E. convolvuli var. convolvuli exhibiting reticulate surface.



Image from Plant Health Progress article:
First Report of Powdery Mildew of Convolvulus arvensis (Field Bindweed) Caused by Erysiphe convolvuli var. convolvuli in North America