Willow scab

Willow scab
Sal willow leaves with willow scab
Systematics
Subdivision : Real ascent mushrooms (Pezizomycotina) Class : Leotiomycetes Order : Wrinkled scabs (Rhytismatales) Family : Wrinkled scab relatives (Rhytismataceae) Genre : Scab fungi ( Rhytisma ) Type : Willow scab
Scientific name
Rhytisma salicinum
( Pers. ) Fr.

The willow scab ( Rhytisma salicinum ) is a hose fungus from the Rhytismataceae family. It causes tar spot disease on willows - analogous to the maple scab on maples .

features

Macroscopic features

Pattern of infestation of the willow scab ( Rhytisma salicinum ) in the conidial stage

The fruit body is about 2 to 5 mm wide and has a wrinkled surface. It consists of round, black and yellow-tinged stroma , which initially develop inside the leaves and bulge them up. In spring, straw-colored fruit slices mark the places where the leaves will later tear.

Microscopic features

The colorless and slightly curved ascospores are 60–90 micrometers long and 1.5–3 micrometers wide. The cylindrical conidospores are 5 to 6 micrometers in length.

ecology

The willow scab attacks various types of willow, especially sal willow , ear willow and basket willow . In the Alps above the tree line , the species also inhabits the reticulated willow and blunt-leaved willow .

swell

literature

Martin Beazor Ellis, Janett Pamela Ellis: Microfungi on Land Plants. At ID Handbook . 2nd revised edition. Richmond Publishing 1997, ISBN 978-085546-246-8 .

Individual evidence

1. ↑ Ewald Gerhardt: Mushrooms . BLV Buchverlag, Munich 2006. Page 552. ISBN 978-3-8354-0053-5 .

Web links

Commons : Rhytisma salicinum  - album with pictures, videos and audio files