EPPO Global Database

Arceuthobium tsugense(ARETS)

Distribution details in United States of America (Oregon)

Current pest situation evaluated by EPPO on the basis of information dated 2021: Present, no details
* Hawksworth FG, Wiens D (1996) Dwarf mistletoes: Biology, pathology, and systematics. USDA - Forest Service. Agriculture Handbook 709, 429 pp.
------- Arceuthobium tsugense subsp. tusgense and A. tsugense subsp. mertensianae.

* Mathiasen R, Daugherty C (2009) First report of mountain hemlock dwarf mistletoe (Arceuthobium tsugense subsp. mertensianae) on sugar pine (Pinus lambertiana) from Oregon. Plant Disease 93(3), p 321.
------- A. tsugense subsp. mertensianae (which commonly affects Tsuga mertensiana) found on Pinus lambertiana.

* Oblinger BW (2021) Susceptibility of sugar pine, Shasta red fir and Sierra lodgepole pine to mountain hemlock dwarf mistletoe (Arceuthobium tsugense subsp. mertensianae, Viscaceae) in south central Oregon. Forest Pathology, e12693. https://doi.org/10.1111/efp.12693
------- Southern Oregon, A. tsugense subsp. mertensianae commonly parasitizes Tsuga mertensiana. Also found on P. albicaulis, P. monticola and P. lambertiana (which should be considered as secondary host and not 'rare host). Abies magnifica var. shasta was found to be immune to A. tsugense subsp. mertensianae.
Situation in neighbouring countries
Country State Status
Canada Present, restricted distribution view...
Canada British Columbia Present, no details view...