Canadian Forest Service Publications
Fungal parasites of lodgepole pine dwarf mistletoe in British Columbia. 1999. Ramsfield, T.D.; Shamoun, S.F.; van der Kamp, B.J. Canadian Journal of Plant Pathology 21: 204.
Available from: Pacific Forestry Centre
Catalog ID: 5251
Available from the Journal's Web site. †
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Lodgepole pine dwarf mistletoe (Arceuthobium americanum) is a serious pest in British Columbia (BC) forests. In BC, the trend towards reduced cut-block sizes and partial cutting systems results in infection of the regenerating conifers by seed dispersal from infected adjacent and overstory trees. Biological control using native fungal parasites is currently being studied as an alternative method of control. During the summer of 1998, diseased dwarf mistletoe plants were collected from the interior of BC. Fungi reported to infect lodgepole pine dwarf mistletoe include Caliciopsis arceuthobii, Cylindrocarpon gillii, and Colletotrichum gloeosporioides, and all were found to infect A. americanum in BC. Colletotrichum gloeosporioides was distributed throughout the province and was isolated from infected shoots and berries. Studies will be focused on the effects of Colletotrichum gloeosporioides on the endophytic system, and shoot mortality and regeneration, as these determine dwarf mistletoe seed production over time.