Powdery mildews on lilac in western North America include Phyllactinia syringae, sp. nov

Two powdery mildews, Erysiphe syringae and the previously undescribed Phyllactinia syringae, sp. nov., occur on lilac in western North America. Phyllactinia syringae is found on common lilac, whereas E. syringae is found on Chinese lilac and, occasionally, common lilac. Infection by P. syringae is e...

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Bibliographic Details
Published in:Mycologia 2017-05, Vol.109 (3), p.485-494
Main Authors: Larsen, Harold J., Braun, Uwe, Blomquist, Cheryl, Woods, Patrick, Mohan, S. Krishna
Format: Article
Language:English
Subjects:
Ascomycota - classification
Ascomycota - genetics
Ascomycota - isolation & purification
E. syringae-japonicae
Erysiphe syringae
morphology
North America
Phyllactinia fraxini
Plant Diseases - microbiology
PLANT PATHOGENS
S. × chinensis
Syringa - microbiology
Syringa vulgaris
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Summary:Two powdery mildews, Erysiphe syringae and the previously undescribed Phyllactinia syringae, sp. nov., occur on lilac in western North America. Phyllactinia syringae is found on common lilac, whereas E. syringae is found on Chinese lilac and, occasionally, common lilac. Infection by P. syringae is extremely unobtrusive until formation of a hypophyllous mycelial mat with chasmothecia in late fall. Infection by E. syringae in late summer is conspicuous, with its thick, superficial mycelial mat on the leaf upper surface detracting from the aesthetic appearance of the bush.
ISSN:0027-5514
1557-2536
DOI:10.1080/00275514.2017.1328220