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Black stain root disease

By R. S. Hunt and D. J. Morrison

Introduction

Black stain root disease, character-ized by longitudinal dark stains in the root and butt wood of conifers, is caused by the native fungus [Leptographium wageneri (Kendr.) Wingf.]. This condition is debilitating to the tree and frequently results in mortality. Although the fungus was collected in British Columbia in 1961, it was not reported causing disease until 1976. Subsequently, it has been reported from many areas in south-ern British Columbia, on the coast, and in the interior.

For more information, see the Black stain root disease Forest Pest Leaflet in the Canadian Forest Service bookstore.