Marssonina leaf spot
- Latin name: Marssonina populi (Lib.) Magnus
- French name: Tache marssoninéenne
- Division: Deuteromycotina
- Class: Coelomycetes
- Synonym(s): Drepanopeziza populorum (Demaz.) Höhn.,
Gloeosporium populi (Lib.) Mont. & Desmaz.
Description
Micro-habitat(s)
Leaf
Distribution
Canada
Damage, symptoms and biology
Diffuse orange-brown spots, 2-5 mm diameter, coalesce into vein-limited blotches.
Small spots scattered on the host are of little consequence, but a serious infection can cause severe, premature defoliation. Repeated defoliation causes weakening and dieback of poplars.
Other information
Drepanopeziza populorum is the sexual stage (teleomorph) of Marssonina populi.
Canadian Forest Service Publications
Information on host(s)
Main host(s)
Black cottonwood, largetooth aspen, plains cottonwood, poplars / aspens / cottonwoods, trembling aspen
Photos
Leaf spot symptoms on hybrid poplar caused by Marssonina populi Brenda Callan
Fruiting bodies of Marssonina castagnei, a causal agent of Marssonina leaf spot, on the lower surface on a European white poplar leaf.
Marssonina castagnei, a causal agent of Marssonina leaf spot, on the surface of a European white poplar leaf.