Notes on powdery mildews of the genus Erysiphe from Azerbaijan

This study was performed to contribute towards an inventory of powdery mildews in Azerbaijan. Thirty-four powdery mildew samples on 18 host species were collected between 2014 and 2016 in different regions of Azerbaijan and examined by means of morphological and molecular methods. Consequently, 18 powdery mildew taxa have been identified. The morphological characteristics of these species are described and illustrated. Erysiphe arcuata, E. berberidis var. asiatica, E. corylacearum, E. quercicola, E. syringae-japonicae, and E. viciaeunijugae are new records of powdery mildews for Azerbaijan. In addition, Castanea sativa is a new host for E. quercicola, Lathyrus odorathus for E. viciae-unijugae, Berberis vulgaris for E. berberidis var. asiatica, and Carpinus orientalis for E. arcuata.