Synopsis of powdery mildews biota on forest trees and Shrubs of Ulyanovsk Region (Russia) and Düzce Province (Turkey)
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Specimens of powdery mildews fungi on trees and shrubs were collected in the period from 2010 to 2015 in forests of left-bank and right-bank parts of the Ulyanovsk Region (Russia) and during the period from 2012 to 2016 in the forests of the province of Duzce (Turkey). The powdery mildews were collected throughout research routes in the forests of both regions as herbarium materials and then were identified. The fungal specimens were examined by a microscope Leica DM-3000 (Leica Microsystems, Germany). 26 powdery mildew species of the genera Erysiphe, Microsphaera, Phyllactinia, Podosphaera and Sawadaea of the family Erysiphaceae of the order Erysiphales were found on trees and shrubs in the forests of the Ulyanovsk Region (Russia) and 29 species of powdery mildew species of the genera Erysiphe, Phyllactinia, Podosphaera and Sawadaea were found on trees and shrubs of the forests of Duzce province (Turkey). Comparative analysis of powdery mildews of the studied region shows that the species Erysiphe adunca, E. alphitoides, E. berberidis, E. euonymi, E. lonicerae, E. prunastri, E. ulmi, Phyllactinia alnicola, Ph. guttata, Podosphaera clandestina, P. leucotricha, P. pannosa, P. Tridactyla and Sawadaea bicornis (13 species) are common to the both regions. Jaccard similarity coefficient is 0.34. The annual development of powdery mildew fungi in the Duzce region begins about 1-1.5 months earlier, and chasmothecia formed 1-1.5 months later than in the Ulyanovsk region, which is due to the difference in environmental and climatic conditions. © 2017 Russian Academy of Sciences. All rights reserved.