Silver leaf disease

Silver leaf disease - Fruiting bodies of <em>Chondrostereum purpureum</em>
  • Latin name: Chondrostereum purpureum (Pers.:Fr) Pouzar.
  • French name: Plomb
  • Division: Basidiomycota
  • Class: Aphyllophorales
  • Synonym(s): Stereum purpereum Pers.: Fr.,
    Stereum rugosiusculum Berk. & M.A. Curtis
Description

Micro-habitat(s)

Trunk

Distribution

Canada

Damage, symptoms and biology

The annual fruiting body forms a circular crust, sometimes with multiple, semicircular caps. The fruiting body is greyish with purple to purplish brown spore-producing areas.

The economic impact of the disease is greater on ornamental and orchard trees than on trees in a forestry setting. Chondrostereum purpureum is largely a saprophyte but can be a weak parasite on living hardwoods. Toxins produced by the fungus affect leaves, and on some hosts kill branches or entire trees. This fungus is currently being considered as a candidate for use as a biocontrol agent for hardwood stump sprouts under power lines.

Other information

Other related fungi in the Stereaceae such as Amylostereum, Stereum, Columnocystis or Peniophora could be confused with old fruiting bodies of C. purpureum.

Canadian Forest Service Publications

Silver leaf disease

Information on host(s)

Main host(s)

Apples, balsam poplar, beeches, black cottonwood, black-gum, Blue-beech, dogwoods, hackberry, hickory, hophornbeam, horsechestnuts, lilac, london plane-tree, maple, mountain alder, mountain-ash, oaks, plum, red alder, serviceberries, trembling aspen, tulip-tree, white birch, willow

Secondary host(s)

Amabilis fir, grand fir, Rocky Mountain Douglas-fir, subalpine fir, western hemlock, western redcedar, white spruce

Photos
  • Silver leaf disease Fruiting bodies of Chondrostereum purpureum
  • Silver leaf disease Fruiting bodies of Chondrostereum purpureum
  • Silver leaf disease Stain associated with decay
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