Powdery Mildew Fungi of Dendroflora of Southern Uzbekistan (Surkhandarya Region)

The article presents data on Powdery mildew of trees and shrubs of the Surkhandarya region of Uzbekistan.11 species of Powdery mildew fungi were found on trees and shrubs of this region. They belong to 2 classes (Leotiomycetes, Lecanoromycetes), 2 orders (Erysiphales, Lecanorales), 2 family (Erysiphaceae, Heterodeaceae) and 5 genera (Microsphaera, Phyllactinia, Sphaerotheca, Trichocladia, Uncinula). Two species of Powdery mildew fungi, Sphaerotheca pannosa var. rosae Woron. on Rosa ecae Aitch. and Trichocladia coluteae f. coluteae Jacz. on Colutea orbiculata (Sumnev. ) Yakovlev, have been recorded on the territory of Uzbekistan for the first time, and new host plants of these parasite fungi were identified.