Spruce-Labrador tea needle rust
Twig, Needle, Leaf
Damage, symptoms and biology
Severe defoliation of spruce occurs in localized areas, particularly when moist environmental conditions prevail, and can reduce the growth of infected trees.
A similar rust on spruce, small-spored spruce-Labrador tea rust, caused by Chrysomyxa ledi de Bary var. ledi, differs from C. ledicola in that its aeciospores are smaller (13.5 to 25 x 18 to 32 µm) and that uredinia form on the lower surface of Ledum leaves.
Canadian Forest Service Publications
Information on host(s)
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