Marssonina leaf spot
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.
Drepanopeziza populorum is the sexual stage (teleomorph) of Marssonina populi.
Canadian Forest Service Publications
Information on host(s)
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