BC’s forests have already faced two simultaneous, globally significant, epidemics linked to climate change; the Dothistroma needle blight epidemic in NW BC and massive mountain pine beetle throughout Interior. Building on these experiences, we compiled our best estimates of how believe other forest health agents may behave as change continues influence forests. We drawn literature from around world but focused situation BC. made management recommendations based what seen so far expect...

summary The ability of 28 monokaryons and 78 reconstituted dikaryons Pisolithus arhizus (Scop, pers Pers.) Rauchert [Syn.: tinctorius (Pers.) Coker & Couch] to form ectomycorrhizas on Pinus pinaster (Ait.) Sol. banksiana (Lamb.) was studied using the growth pouch method. mycorrhiza promote P. differed both between within monkaryons dikaryons. Some failed ectomycorrhizas. Monokaryons formed fewer than heterokaryotic state necessary for full expression ectomycorrhiza‐forming ability....

SUMMARY The cell free culture media of 16 ectomycorrhizal fungi were tested for their ability to inhibit the growth 23 phytopathogens and one fungus. Extracellular metabolites seven (44%) fungi, Amanita citrina, Laccaria bicolor, Iaccata, Pisolithus tinctorius, Suillns brevipes, Trircholomo flavovirens Tricholoma pessundatum , inhibited up 20 24 (83%) tested. Two P. tinctorius T. inhibitory fungus, Sphaerosporella brunnea. A microscopic examination at colony margin confronted phytopathogenic...

Eleven specimens of basidiospores Pisolithus arhizus various provenances were assayed for their ability to germinate. Three incubation amendments tested basidiospore germination induction value. Two made in combination, using different seedlings on differently amended media. An additional assay was two activator compounds. Basidiospores specimens, one from South Africa and Australia germinated some the combination plates No occurred with compounds (1-nonanol abietic acid).Intrastrain...

Two antifungal compounds isolated from the liquid culture medium of Pisolithus arhizus were identified as p-hydroxybenzoylformic acid and (R)-(-)-p-hydroxymandelic given trivial names pisolithin A B, respectively. The efficacy to inhibit germination conidia Truncatella hartigii was compared with that commercially available structural analogues, a comparable range effectiveness for 50% inhibition (GI50) recorded. synthetic (R)-mandelic acid, benzoylformic racemic p-hydroxymandelic had GI50...

SUMMARY The morphology and development of ectomycorrhizas formed by Pezisa whitei (Gilkey) Trappe, Labyrvnthomyces sp. (Ascomycetes) Laccaria ohiensis (Mont.) Singer (Basidiomycete) on a range hosts including Pultenaea obovata Benth., Gompholobium latifolium Sm. (shrubs) Poranthera microphylla Brongn., Angianthus tomentosus Wendl., Waitssia citrina (Benth.) Steetz Stvlidium gratninifolium Sw. ex Willd. (herbs) have been studied in gnotobiotic system soil mix low available phosphate....

The ectomycorrhizal fungus Pisolithus tinctorius secreted a metabolite that lysed hypha and conidia inhibited the germination of in range phytopathogenic fungi. optimum incubation period for production by P. liquid culture was 42–56 days. Dilutions filtrate with fresh medium caused gradient inhibitory effects. For hyphal lysis minimum ratio to complete growth inhibition 5:1 Rhizoctonia praticola Truncatella hartigii 3:1 Sphaerosporella brunnea. At higher dilutions, hyphae formed were short...

Abstract: Studies were conducted under laboratory conditions to document the potential of Beauveria bassiana conidia applications for controlling white pine weevil, Pissodes strobi (Peck). A screening test including six B. isolates allowed us demonstrate that CFL (Centre de Foresterie des Laurentides) and IP‐CPB (Île Perrault‐charançon du pin blanc) most virulent among ones tested, with percentages mortality after 3 weeks 73% 85.5%, respectively. These two basiana applied either onto soil or...

Western redcedar ( Thuja plicata Donn ex D. Don) seedlings from a population study with family structure were planted at four sites across coastal British Columbia. All the time of planting infected cedar leaf blight (CLB) Didymascella thujina (E.J. Durand) Maire). CLB severity and tree heights measured various ages 2 to 12 years. There significant site differences in hypermaritime showing most submaritime least. Population disease evident Columbia coastal, low-elevation populations...

Homokaryon-homokaryon and heterokaryon-homokaryon interactions of sibling strains the ectomycorrhizal fungus Pisolithus arhizus were investigated. Pairings between sexually compatible homokaryons gave rise, almost always, to heterokaryotic mycelium in both progenitors, but some cases was present only one progenitors. This unidirectional movement nuclei speed nuclear followed six representative pairings complete heterokaryotization occurred rapidly, within 4 days, progenitor pairing. In...

Abstract The widely occurring fungal genus Lecanicillium Zare & W. Gams (formerly Verticillium ) includes species that are pathogenic to insects. We collected 27 isolates from soil and dead adult Pissodes strobi (Peck) in British Columbia, Canada, assessed their virulence against this host. Eighteen were identified as L. longisporum (Petch) six muscarium Gams, while three could not be the level. assayed a subset of these (14 , 3 1 sp.) well component commercial products Mycotal® (...

Two fungicides, propiconazole (Topas®) and mancozeb (Dithane®), were evaluated for their efficacy to control the foliar disease, Keithia leaf blight (Didymascella thujina) of western redcedar (Thuja plicata), in three container-seedling nurseries British Columbia, 1995. At each nursery, five fungicide a treatment applied. Each was applied one-year-old container-grown seedlings at two nurseries, two-year-old third nursery. The four rates (0.05, 0.075, 0.125 0.250 kg ai 1000L −1 ha ) every...

Although reports of Colletotrichum gloeosporioides (Penz.) Penz. & Sacc. in occurring as a hyperparasite western hemlock dwarf mistletoe (Arceuthobium tsugense (Rosend.) G.N. Jones subsp. tsugense) have been previously published (1), there are no collection or herbarium records to support this finding (B. Geils, personal communication). Given ambiguity, report is the first record C. on A. based voucher collections deposited at Pacific Forestry Centre (DAVFP #25277). Western parasitic plant...

Sooty bark disease is an invasive causing significant mortality of sycamore maple (Acer pseudoplatanus L.) in Europe, where it emerging due to increasing drought and heat events. The causal agent, Cryptostroma corticale (Ellis & Everh.) P. H. Greg. S. Waller, a fungus endemic the Great Lake region eastern Canada, does not appear cause within its natural host range (e.g. sugar maple, Acer saccharum Marshall). was reported on additional species Washington State beginning 2017. In summer 2022,...

The wood properties of western redcedar (Thuja plicata) (WRC) are revered in traditional practices by Pacific Coast First Nations and valued for speciality commercial purposes. In the near future, WRC harvesting will shift to second growth from old-growth, however, its cultural significance persist, superior physical chemical mean that it remain high demand. Investigating understanding adaptations species environmental pathogen stress face changing climates can assure a sustainable supply...

Abstract The entomopathogenic fungal genus Lecanicillium Gams and Zare includes species that are highly pathogenic to many genera of insects. Three species, longisporum (Petch) W. Gams, L. muscarium pissodis Kope Leal, were found be entomopathogens adult white pine weevils, Pissodes strobi (Peck), in coastal British Columbia. Morphological characteristics used identify these but variation conidial shape size made it difficult classify some the isolates into correct . To confirm identity we...