A critical revision of the powdery mildew fungi (Erysiphaceae, Ascomycota) of Ukraine: Erysiphe sect. Microsphaera

The article continues a series of critical reviews the species composition powdery mildew fungi (Erysiphaceae, Helotiales, Ascomycota) Ukraine and their distribution within country. This deals with section Microsphaera genus Erysiphe. These are distinguished by fruiting bodies that have non-mycelioid appendages dichotomously branched apices. A list 36 recorded in regions is provided, as well key for identification. most common frequently occurring many E. alphitoides, astragali, berberidis, divaricata, ehrenbergii, euonymi, ornata var. europaea, palczewskii, syringae-japonicae, trifoliorum. Other species, such baeumleri, elevata, euonymicola, friesii, grossulariae, hyperici, hypophylla, ornata, penicillata, pseudoacaciae, robiniae, syringae, tortilis, vanbruntiana, viburni, were less often. Erysiphe azaleae, begoniicola, corylacearum, deutziae, gorlenkoi, guarinonii, magnifica, magnusii, platani, rayssiae, russellii, symphoricarpi known only from some localities. number invasive mostly relatively recently, last hundred years. Of them, vanbruntiana become Ukraine. platani can massively develop certain or recently registered corylacearum apparently becoming widespread Carpathians, ravenelii at present occur Kyiv. Some few localities; however, Kyiv magnolias commonly infected magnifica. At same time, North American syringae has disappeared since East Asian fungus syringae-japonicae started to spread on lilac. indigenous robiniae also ceased Caragana arborescens, being completely replaced palczewskii.