Morphology of Erysiphe deutziicola on Deutzia parviflora. A Lobed hyphal appresorium B–D Conidiophores E–G Conidia H Lobed germ tube arising from the lateral of conidium I Germ tube showing longitubus pattern arising from a conidium in perihilar position J Slightly lobed germ tube arising from the perihilar position of a conidium K Chasmothecium L Appendage with sinuous-geniculate, branched and circinate apex M Peridium cells N Ascus with 5 ascospores O Ascus with six ascospores P Ascus with seven ascospores Q Ellipsoid ascus with eight ascospores R Clavate ascus with eight ascospores S Ellipsoid ascospore T Ovoid ascospore. Scale bars: 20 μm.