Canadian Forest Service Publications

Pathological effects of Chondrostereum purpureum in inoculated yellow birch and beech. 1991. Wall, R.E. Canadian Journal of Plant Pathology 13: 81-87.

Year: 1991

Issued by: Pacific Forestry Centre

Catalog ID: 3124

Language: English

Availability: Order paper copy (free)

Available from the Journal's Web site.
DOI: 10.1080/07060669109500969

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Yellow birch (Betula alleghaniensis) and beech (Fagus grandifolia) trees were inoculated with Chondrostereum purpureum during the growing seasons of 1983 to 1985, and resulting cankers were measured after 1, 2, and 3 years. After 1, 4, and 6 years, representative yellow birch trees were felled and dissected to examine discoloration and decay associated with the cankers. None of the inoculated trees died and no external symptoms other than elongate cankers and occasional basidiocarps were observed during the 6-year period. Although there was considerable variation among trees in canker size, the largest cankers tended to develop from inoculations made in mid summer, while the smallest resulted from inoculations made early in the growing season. Canker enlargement was not sufficient to cause tree girdling in any instance, but a few large, open cankers with associated decay developed. In dissected yellow birch trees, considerable staining of the xylem occurred longitudinally beyond the cankers. Chondrostereum purpureum was isolated from stained or decayed wood associated with all inoculations, including those in which the cankers had closed over. In a few instances, xylem staining extended into the roots, but C. purpureum was not recovered from stained or decayed root tissues. Based on these results, Chondrostereum purpureum is not considered a threat to hardwood trees in healthy forests but could contribute to decline of severely stressed trees.