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Bigleaf maple (Acer macrophyllum) and red alder (Alnus rubra Bong.) are weeds in the Coast Forest Region of British Columbia, Canada, when they grow to the detriment of commercially valuable conifers. Research carried out at Pacific forestry Center, Forestry Canada, was directed toward biological control of bigleaf maple and red alder. The selection of candidate bioagents (mycoherbicides) was limited by the choice of native or indigenous microorganisms. Three potentially pathogenic endophytes have been found on bigleaf maple: Cryptodiaporthe hystrix, Diaporthe eres, and Glomerella enqulata. Six pathogenic species have been isolated from red alder: Diaportthe eres, Gnomonia setacea, Gnomoniella tubaeformis, Melanconis alni, Nectria sp., and Septoria alni. These species were discussed in respect to their frequency of occurrence as endophytes, their morphology, as well as their pathogenicity and were used to calculate the Latent Disease Potential (LDP) at each site.
Sieber, T.N., Sieber-Canavesi, F.; Dorworth, C.E.. 1990. Identification of Key Pathogens of Major Coastal Forest Weeds. British Columbia Ministry of Forests, Lands, Natural Resource Operations and Rural Development. FRDA Research Report. FRR113
Topic: FLNRORD Research Program
Keywords: Vegetation, Management
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