Schweinitzii root and butt disease (Phaeolus schweinitzii) in Southern Plant Diagnostic Network

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June 27, 2002

Andrej Kunca, National Forest Centre - Slovakia, Bugwood.org

June 27, 2002

Phaeolus schweinitzii (Velvet top fungus) causes a brown cubical rot in the upper roots and lower bole of many conifer species.

Joseph OBrien, USDA Forest Service, Bugwood.org

Phaeolus schweinitzii (Velvet top fungus) causes a brown cubical rot in the upper roots and lower bole of many conifer species.

Schweinitzii root and butt disease (<em>Phaeolus schweinitzii</em>) fruiting bodies

Robert L. Anderson, USDA Forest Service, Bugwood.org

Schweinitzii root and butt disease (Phaeolus schweinitzii) fruiting bodies

windthrown tree

Robert L. Anderson, USDA Forest Service, Bugwood.org

windthrown tree

Conk of the velvet top fungus the cause of Schweinitzii Root Rot.

Susan K. Hagle, USDA Forest Service, Bugwood.org

Conk of the velvet top fungus the cause of Schweinitzii Root Rot.

Brown cubical decay in the butt end of the first log is the most common indication.

Susan K. Hagle, USDA Forest Service, Bugwood.org

Brown cubical decay in the butt end of the first log is the most common indication.

Small diameter roots sometimes have a dark red resinous heart when infected.

Susan K. Hagle, USDA Forest Service, Bugwood.org

Small diameter roots sometimes have a dark red resinous heart when infected.

Roots of windthrown trees with schweinitzii root rot commonly are stubbed and have gall-like swellings.

Susan K. Hagle, USDA Forest Service, Bugwood.org

Roots of windthrown trees with schweinitzii root rot commonly are stubbed and have gall-like swellings.

Schweinitzii root and butt disease (<em>Phaeolus schweinitzii</em>) fruiting bodies on Monterey pine (<em>Pinus radiata</em>)

USDA Forest Service - Forest Health Protection Intermountain Region - Ogden, UT , USDA Forest Service, Bugwood.org

Schweinitzii root and butt disease (Phaeolus schweinitzii) fruiting bodies on Monterey pine (Pinus radiata)

root swelling/lesion

USDA Forest Service - Northern and Intermountain Region , USDA Forest Service, Bugwood.org

root swelling/lesion

Brown decay in center of approx. 4 cm diameter root. Very common and slow-acting disease of conifers.

Susan K. Hagle, USDA Forest Service, Bugwood.org

Brown decay in center of approx. 4 cm diameter root. Very common and slow-acting disease of conifers.

Basidiocarp of velvet top fungus <em>(Phaeolus schweinitzii</em>) from a conifer tree.

William Jacobi, Colorado State University, Bugwood.org

Basidiocarp of velvet top fungus (Phaeolus schweinitzii) from a conifer tree.