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Disease Note. First Report of Butternut Canker in Ontario. C. N. Davis, Forestry Canada, Ontario Region, Box 490, Sault Ste. Marie, Ontario P6A 5M7, Canada. D. T. Myren, and E. J. Czerwinski. Forestry Canada, Ontario Region, Box 490, Sault Ste. Marie, Ontario P6A 5M7, Canada. Plant Dis. 76:972. Accepted for publication 20 April 1992. Copyright 1992 The American Phytopathological Society. DOI: 10.1094/PD-76-0972A. Sirococcus clavigignenti-juglandacearum Nair, Kostichka, & Kuntz,
the cause of butternut canker (1), was isolated from cankers on samples
of butternut (Juglans cinerea L.) collected in Ontario during the
summer of 1991 and submitted to the Great Lakes Forestry Centre
of Forestry Canada, Ontario Region, by a field technician with the
center's Forest Insect and Disease Survey unit. The technician reported
that cankers, decline, and mortality were common on butternut
throughout the southwestern region of the province. The collection
from which the fungus was isolated was made in Ipperwash Provincial
Park (lat. 45° II' N, long. 81°51' W), located on southern Lake Huron.
A culture of the fungus (SSMF 915-0882) has been retained in the
Ontario Region collection housed at the Great Lakes Forestry Centre
in Sault Ste. Marie. This is the first report of S. clavigignenti-juglandacearum
in Canada, although a collection was made recently
in Quebec (G. Laflamme, personal communication). |