Canadian Forest Service Publications
Natural infection of two new hosts by hemlock dwarf mistletoe in British Columbia. 1978. Hunt, R.S.; Smith, R.B. Canadian Plant Disease Survey 58(2): 31-32.
Issued by: Pacific Forestry Centre
Catalog ID: 1890
Availability: PDF (request by e-mail)
The dwarf mistletoe, Arceughobium tsugense, exists as two pathotypes in British Columbia: one primarily infects western hemlock (Tsuga heterophylla), the other shore pine (Pinus contorta var. contorta). This is the first report of natural occurrence of either pathotypes on Douglas-fir (Pseudotsuga menziesii) and the first of the hemlock dwarf mistletoe pathotype on western white pine (Pinus montricola) north of Oregon.