Canadian Journal of Plant Pathology (2021) 43, 472-479

Nicolas Feau, Tod D. Ramsfield, Colin L. Myrholm, Bradley Tomm, Herb F. Cerezke, Andy Benowicz, Erica Samis, Ashley Romano, Angela L. Dale, Arnaud Capron, Renate Heinzelmann and Richard C. Hamelin (2021)
DNA-barcoding identification of Dothistroma septosporum on Pinus contorta var. latifolia, P. banksiana and their hybrid in northern Alberta, Canada
Canadian Journal of Plant Pathology 43 (3), 472-479
Abstract: The ascomycete fungi Dothistroma septosporum (Dorogin) M. Morelet and D. pini Hulbary are both responsible for Dothistroma needle blight disease (DNB) on pines. Using a DNA-barcoding approach, we confirmed that the DNB infection of lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.), jack pine (P. banksiana Lamb.) and their hybrid in four research sites in northern Alberta (Canada) was caused by D. septosporum, confirming that the range of D. septosporum extends east of the Rocky Mountains into Alberta. Analysis of mating-type (MAT) genes showed the presence of both mating types in each of the pine plantations, indicating that the pathogen has the potential to complete its lifecycle in this region. Controlled inoculation confirmed that the two native pines found in this area (P. contorta var. latifolia and P. banksiana) and their hybrid are susceptible to D. septosporum, suggesting that continuous monitoring of the disease needs to be carried out to prevent any future outbreak in natural stands.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Richard C. Hamelin

Research topic(s) for pests/diseases/weeds:
identification/taxonomy
surveys/sampling/distribution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Dothistroma septosporum	Pine (Pinus)	Canada (west)