Early results from field trials using Hypholoma fasciculare to reduce Armillaria ostoyae root disease

Abstract

Armillaria ostoyae (Romagn.) Herink. causes serious damage to forest tree species worldwide. In this study, Hypholoma fasciculare (Huds. ex Fr.) Kummer was inoculated, after logging, into areas in south-central British Columbia that had been identified as having high levels of A. ostoyae. Hypholoma fasciculare was successfully established in a variety of different types of trials, as indicated by growth of H. fasciculare mycelium into roots of inoculated stumps and the presence of fruiting bodies on and around stumps. Three to five years after treatment, inoculated plots had biologically and statistically significantly lower levels of mortality attributable to A. ostoyae.Résumé : L'Armillaria ostoyae (Romagn.) Herink. cause de sérieux dommages chez plusieurs essences forestières, un peu partout au monde. L'auteur a inoculé l'Hypholoma fasciculare (Huds. ex Fr.) Kummer., après la récolte forestière, dans des régions du centre-sud de la Colombie-Brittanique où on observe de fortes densités de l'A. ostoyae. Le mycé-lium de l'H. fasciculare a été introduit avec succès suite à un ensemble de différents types d'essais, tel que révélé par la croissance de l'H. fasciculare dans les racines des souches inoculées et la présence de basidiomes sur et autour des souches. De 3 à 5 ans après le traitement, les parcelles inoculées montrent un degré significativement moindre de mortalité attribuable à l'A. ostoyae, au plan statistique aussi bien que biologique.Mots clés : Hypholoma fasciculare, armillaire, maîtrise biologique, débris ligneux.[Traduit par la Rédaction] Chapman et al. 969

Fungal community in chestnut orchards with different Hypholoma fasciculare aboveground abundance: potential implications for sustainable production

“…Field trials where H. fasciculare was introduced in areas predicted to have problematic levels of root disease have already been conducted, in order to control the causal agent Armillaria ostoyae (Chapman et al, 2004). In the present study, we have detected a positive correlation of H. fasciculare on the relative abundance of ECM fruitbodies (p<0.5; Figure 2B) that contrasts with the negative correlation found when using the metabarcoding analysis (p<0.01; Figure 2C).…”

“…Herink. (Chapman et al, 2004). Although some H. fasciculare antagonistic interactions could be indeed beneficial for chestnut tree sustainability, others could be detrimental for ectomycorrhizal association, as revealed by in vitro assays (Pereira et al, 2011).…”

Species of Hypholoma (Fr.) P. Kumm. (Strophariaceae, Agaricales) in Rio Grande do Sul State, Brazil

“…This species has also been investigated for its antioxidant (Badalyan 2003) and hypoglycemic (Badalyan & Serrano 1999) activities. As active wood and litter decomposers, they also play an important role in forest ecosystems, being currently used in bioconversion of cellulose, fabric and dye industrial residues (Hofrichter & Fritsche 1997;Steffen et al 2000), and also in biological control of phytopathogenic fungi (Badalyan et al 2002;Chapman et al 2004).…”

Survival and growth response of seedlings in root disease infected partial cuts in the Interior Cedar Hemlock zone of southeastern British Columbia

“…As Morrison et al (1991) points out, it may take longer than 5 years for the increased Armillaria inoculum load to make lethal root contact with the small seedlings, although in some other cases it has not (Chapman et al, 2004). Alternatively, disease levels may not have been reduced enough by pushover falling to significantly reduce seedling mortality in these treatments.…”