Canadian Forest Service Publications
Pathogenicity tests of Valsa species occurring on conifers in Québec. 1971. Smerlis, E. Phytoprotection 52(1): 28-31.
Issued by: Laurentian Forestry Centre
Catalog ID: 15955
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Pathogenicity of five Valsa species occurring on conifers in Québec was investigated. Valsa friesii (Duby) Fckl. was pathogenic on balsam fir, eastern hemlock, European larch, tamarack, creeping and ground juniper, jack, lodgepole, red, Scots, and white pine, and black, Norway, red, and white spruce. Valsa pini (Alb. & Schw.) Fr. caused disease symptoms on the same tree species as V. friesii except European larch, tamarack, and the two species of junipers. Valsa abietis (Fr.) was pathogenic on eastern hemlock, European larch, tamarack, and black, Norway, red and white spruce. Inoculations with V. taxi Fckl. and V. thujae Pk. on several conifers were negative.