Sawadaea bicornis
| Sawadaea bicornis | |
|---|---|
| Sawadaea bicornis on Acer | |
| Scientific classification | |
| Kingdom: | Fungi |
| Division: | Ascomycota |
| Class: | Leotiomycetes |
| Order: | Helotiales |
| Family: | Erysiphaceae |
| Genus: | Sawadaea |
| Species: | S. bicornis
|
| Binomial name | |
| Sawadaea bicornis (Wallr.) Homma, 1937
| |
Sawadaea bicornis is a species of powdery mildew in the family Erysiphaceae. It is found across the world, where it affects maples (genus Acer).
Description
The fungus forms thin, white irregular patches on the leaves of its host. Sawadaea bicornis affects many species in the genus Acer, including Acer macrophyllum, A. campestre, A. pseudoplatanus, A. negundo, A. grandidentatum, A. tataricum, A. circinatum, A. saccharinum, and A. platanoides. Some of these species can also be affected by Sawadaea tulasnei so care should be taken to distinguish the two.[1]
Taxonomy
The fungus has two different formae. S. bicornis f. bicornis affects Acer campestre and A. planatoides. S. bicornis f. polyphaga is a more virulent form that has evolved to infect a much larger range of host species and is introduced across the world.[2]
References
- ^ Braun, Uwe; Cook, Roger T. A. (2012). Taxonomic manual of the Erysiphales (powdery mildews). CBS biodiversity series. Utrecht: CBS-KNAW fungal biodiversity centre. ISBN 978-90-70351-89-2.
- ^ Feng, J.; Guan, G.X.; Wu, X.L.; Liu, S.Y.; Song, J.G.; Bradshaw, M.; Götz, M.; Braun, U.; Takamatsu, S.; Heluta, V.; Jin, D.N.; Wang, S.B.; He, Y.H.; Zhang, Z.Y.; Liu, L. (2025). "Phylogeny and taxonomy of Acer powdery mildews, including genera Sawadaea and Takamatsuella (Erysiphaceae, Ascomycota)". Studies in Mycology. doi:10.3114/sim.2025.112.01. ISSN 0166-0616.