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Armillaria Root Disease

The information accessed from this screen is based on the publication: Morrison, D. J. 1981. Armillaria Root Disease: A Guide to Disease Diagnosis, Development and Management in British Columbia. Pacific Forestry Centre, Victoria, B. C. Information Report BC-X-203. 15 pp.

Preface

Armillaria mellea (Vahl ex Fr.) Kummer [Armillariella mellea (Vahl ex Fr.) Karst.] causes a root disease of conifers and hardwoods province wide up to about the 56th parallel. Over this range, damage caused by the disease varies from minor mortality in young coastal plantations to mortality throughout the rotation, resulting in stand openings, in forests of the southern interior.

In British Columbia, there are several root disease fungi that cause similar symptoms and damage; however, each disease has specific management prescriptions. It is essential, therefore, that forest managers recognize the signs and symptoms that distinguish A. mellea from other root diseases, particularly Phellinus weirii (Murr.) Gilbertson (Wallis 1976).

This report, describing the biology, signs and symptoms, damage and distribution, and management options for A. mellea, is intended for foresters responsible for management of A. mellea-infested stands. Additional information and assistance with recognition of A. mellea, training of personnel or layout and monitoring of control projects may be obtained from Canadian Forest Service, Pacific Forestry Centre, 506 West Burnside Road, Victoria, B. C.

For more information, see the Armillaria Root Disease Forest Pest Leaflet in the Canadian Forest Service bookstore.