Reports on Plant Diseases Cytospora Canker of Poplars and Willows

Cytospora canker of poplars-including aspens and cottonwoods-and willows is caused by the fungus Cytospora chrysosperma (perfect or teleomorph state Valsa sordida). Cytospora canker has been associated with the decline and/or death of many thousands of valuable ornamental trees in landscape, windbreak, and recreational areas as well as poplar (cottonwood) cuttings in storage and nursery propagation beds.

University of Illinois at Urbana-Champaign
Urbana, IL 61801

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