Some observations on the longevity of Fomes annosus in conifer stumps.

Greig, B. J. W.; Pratt, J. E.

doi:10.1111/j.1439-0329.1976.tb00533.x

Cited by 37 publications

(26 citation statements)

References 4 publications

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“…Statistically significant values at the 95% level are indicated by (?) for clustering, and (•) indicates a pattern not significantly different from spatial randomness n is the number of trees analysed Oecologia (2010Oecologia ( ) 164:1107Oecologia ( -1119Oecologia ( 1113 Notably, pathogens that cause increased damage in trees predisposed by stress are often already present in their host before the stressful event (Greig and Pratt 1976;Franklin et al 1987;Manion 1991). The large size of some H. abietinum genets found in the study area suggests that they are more than 20 years old (Sánchez et al 2007).…”

Section: Discussionmentioning

confidence: 99%

Stand-structural effects on Heterobasidion abietinum-related mortality following drought events in Abies pinsapo

et al. 2010

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Climate change may affect tree-pathogen interactions. This possibility has important implications for drought-prone forests, where stand dynamics and disease pathogenicity are especially sensitive to climatic stress. In addition, stand structural attributes including density-dependent tree-to-tree competition may modulate the stands' resistance to drought events and pathogen outbreaks. To assess the effects of stand structure on root-rot-related mortality after severe droughts, we focused on Heterobasidion abietinum mortality in relict Spanish stands of Abies pinsapo, a drought-sensitive fir. We compared stand attributes and tree spatial patterns in three plots with H. abietinum root-rot disease and three plots without root-rot. Point-pattern analyses were used to investigate the scale and extent of mortality patterns and to test hypotheses related to the spread of the disease. Dendrochronology was used to date the year of death and to assess the association between droughts and growth decline. We applied a structural equation modelling approach to test if tree mortality occurs more rapidly than predicted by a simple distance model when trees are subjected to high tree-to-tree competition and following drought events. Contrary to expectations of drought mortality, the effect of precipitation on the year of death was strong and negative, indicating that a period of high precipitation induced an earlier tree death. Competition intensity, related to the size and density of neighbour trees, also induced an earlier tree death. The effect of distance to the disease focus was negligible except in combination with intensive competition. Our results indicate that infected trees have decreased ability to withstand drought stress, and demonstrate that tree-to-tree competition and fungal infection act as predisposing factors of forest decline and mortality.

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Section: Discussionmentioning

confidence: 99%

Stand-structural effects on Heterobasidion abietinum-related mortality following drought events in Abies pinsapo

et al. 2010

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“…Greig and Pratt (1976) showed that Heterobasidion is able to survive in stumps for decades. They found active pathogen's mycelium in 33-62-year-old Scots pine stumps, 30-46-year old larch and 30-year-old Douglas fir stumps, Norway and Sitka spruce.…”

Section: Resultsmentioning

confidence: 99%

Description of Heterobasidion annosum population occurring in Scots pine stands in Człopa Forest Districts II. Mycelium development in a dead wood

Cieślak¹,

Behnke‐Borowczyk²,

Raźny³

et al. 2015

Acta Sci.Pol. Silv.

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Abstract. The aim of this study was to test the ability of dead wood colonization of Heterobasidion annosum isolates with known aggressiveness to the Scots pine seedlings. The experiment was established in Scots pine stand localized in the Człopa Forest District. Roots of six-month-old stumps were inoculated with mycelium of 19 genotypes of H. annosum Genotypes colonized wood of Scots pine roots on distance from 8.10 cm to 43.27 cm. The genotypes that colonized wood on a shortest distance and the most extensively differed significantly from others. The analysis of the ability of wood colonization by mycelium of genotypes in relations to its origin showed that genotypes collected from stumps overgrew the roots slightly stronger (about 14.5%) than those collected from trees, but differences were not significant. There were no differences between genotypes isolated from pines and beaches, either. Population of H. annosum differed in genotypes features conditioning the rate of its development in the environment and disease dynamics. Differentiation of these features of pathogen populations caused an unequal infection and disease development rate in stands. It seems that the most aggressive isolates colonize the stand fastest through root system.

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“…Once H. irregulare is established in a pine stump, it can use grafts between infected and non-infected roots to further its spread within a plantation. Depending on pine species and geographical locations, H. annosum in Europe (Woodward et al 1998), which is very similar to H. irregulare, can survive in stumps for 10 to 46 yr (Redfern and Stenlid 1998), even up to 62 yr (Greig and Pratt 1976), thus making it a chronic infectious agent through several silvicultural treatments.…”

Section: Découvrir La Revuementioning

confidence: 99%

Efficacy of two Phlebiopsis gigantea formulations in preventing Heterobasidion irregulare colonization of red pine stumps in eastern Canada

Dumas

Laflamme

2013

phyto

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Heterobasidion irregulare is the scientific name for the North American fungal species that was previously known as H. annosum (P-type) and Fomes annosus. In eastern Canada, the pathogen is found mainly in red pine plantations in southern Ontario and Quebec, where it causes tree mortality. There is no registered control method currently available for this disease in Canada. Phlebiopsis gigantea is a saprophytic basidiomycete successfully used and registered as a biological control agent in several European countries. In order to register a control product in Canada, its efficacy must be demonstrated under field conditions. Trials were performed with two Canadian isolates of P. gigantea in four red pine plantations in Ontario. The mean diameters of treated stumps ranged from 29 to 35 cm. After 2 mo, all 238 stumps treated were free of disease, while 12% of the 120 untreated stumps were colonized by the pathogen. The two formulations without P. gigantea did not prevent the colonization of the stumps by either P. gigantea or H. irregulare. These results show that the two Canadian isolates of P. gigantea can prevent colonization of red pine stumps by H. irregulare and provide support for the registration of P. gigantea as a biocontrol agent in eastern Canada.

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Some observations on the longevity of Fomes annosus in conifer stumps.

Cited by 37 publications

References 4 publications

Stand-structural effects on Heterobasidion abietinum-related mortality following drought events in Abies pinsapo

Stand-structural effects on Heterobasidion abietinum-related mortality following drought events in Abies pinsapo

Description of Heterobasidion annosum population occurring in Scots pine stands in Człopa Forest Districts II. Mycelium development in a dead wood

Efficacy of two Phlebiopsis gigantea formulations in preventing Heterobasidion irregulare colonization of red pine stumps in eastern Canada

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