Natural infection and colonization of pre-commercially cut stumps of Picea abies and Pinus sylvestris by Heterobasidion rot and its biocontrol fungus Phlebiopsis gigantea

Gaitnieks, T.; Zaļuma, Astra; Kenigsvalde, Kristīne; Brūna, Lauma; Kļaviņa, Dārta; Burņeviča, Natālija; Stenlid, Jan; Jankovský, L.; Vasaitis, Rimvydas

doi:10.1016/j.biocontrol.2020.104208

Cited by 8 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, this is not consistent with the results of studies conducted in the Alps reporting higher infection frequencies in Norway spruce stumps compared to pine stumps [18]. More infected Norway spruce stumps compared to pine stumps have also been found in mixed spruce-pine stands in Latvia [19], as well as in small diameter stumps after pre-commercial thinning [49,50]. The above inconsistencies could be related to the substrate that was analyzed-discs vs. stumps.…”

Section: Discussionmentioning

confidence: 57%

Inferences on the Susceptibility of Wood of Different Tree Species to Heterobasidion annosum Sensu Lato Primary Infections and on the Range of Pathogen Spores Dispersal

Brūna

Lione

Kenigsvalde

et al. 2021

Forests

Self Cite

View full text Add to dashboard Cite

Stumps play a pivotal role in the epidemiology of the fungal forest pathogens Heterobasidion spp. because they are the main courts of primary airborne infections. The aims of this study were (i) to determine the susceptibility of seven tree species (i.e., Larix sibirica, Picea abies, Picea sitchensis, Pinus contorta, Pinus strobus, Pinus sylvestris and Pseudotsuga menziesii) to primary infection by H. annosum and H. parviporum through comparative inoculation experiments of conidia on wood discs in controlled conditions; (ii) to compare the susceptibility of wood discs of the same tree species to natural airborne infections in two Latvian Norway spruce forest stands infested either by H. annosum or H. parviporum; (iii) to explore the rates of infection of wood discs at increasing distances from spore sources in these two forests to make inferences on the range of spores dispersal. Results obtained by spraying wood discs with conidial suspensions in controlled conditions are in agreement with those obtained by exposing wood discs to the natural airborne inoculum in the forests, as clearly supported by the significant correlation (r = 0.79; p < 0.05) between the two sets of data. Susceptibility was highest in Pinus species, followed by P. abies and P. sitchensis. Susceptibility was lowest for L. sibirica and P. menziesii. The area colonized by Heterobasidion spp. in the sapwood of wood discs was much greater than that colonized in the heartwood. A sharp decrease in the rate of infection of wood discs with distance from spore sources (i.e., fruiting bodies) was observed, further confirming the importance of local spore sources in the epidemiology of Heterobasidion spp. Taken together, these findings could help designing tactics to manage these fungal forest pathogens.

show abstract

Section: Discussionmentioning

confidence: 57%

Inferences on the Susceptibility of Wood of Different Tree Species to Heterobasidion annosum Sensu Lato Primary Infections and on the Range of Pathogen Spores Dispersal

Brūna

Lione

Kenigsvalde

et al. 2021

Forests

Self Cite

View full text Add to dashboard Cite

show abstract

“…Several studies have reported the infection of small diameter spruce stumps by Heterobasidion spores (Gunulf et al 2012;Gaitnieks et al 2018Gaitnieks et al , 2020. In addition, the planting of spruce in these areas was carried out after the complete destruction of the previous spruce stand by windfall.…”

Section: Discussionmentioning

confidence: 99%

Spread of Heterobasidion genotypes in Norway spruce stands on drained peat soil in Latvia

et al. 2022

Self Cite

View full text Add to dashboard Cite

According to several earlier studies, the prevalence of Heterobasidion in peat soils is generally lower compared to mineral soils. However, in some Norway spruce (Picea abies (L.) Karst.) stands on drained peat soils in Latvia, serious damage caused by Heterobasidion root rot has been observed. To determine the spread of Heterobasidion spp. on peat soil, we analyzed the structure of Heterobasidion genets in 20 study plots established in disease centres in 11 spruce-dominated peatland forest stands. A total of 381 standing spruce trees and 244 spruce stumps were examined for Heterobasidion infection. The fungus was isolated from 181 spruce trees (47.5%) and 43 stumps (17.6%). In total, 101 different Heterobasidion genotypes (genets) were identified (on average five genotypes per study plot). The average number of trees infected by a single Heterobasidion genotype was 2.2. Most of the genets (68.3%) had infected only one tree or stump while the rest of the genets (31.7%) had infected several trees and stumps. To the best of our knowledge, this is the first study to investigate the spread of Heterobasidion genotypes in peatland forest stands. To reduce losses caused by Heterobasidion root rot in spruce forests on drained peat soils, it is important to prevent primary spore infections as well as to avoid planting pure spruce stands with high density.

show abstract

“…Discs were examined for the presence of Heterobasidion spp. conidiophores [47], and the presence of P. gigantea was estimated by morphological inspection of the mycelia and presence of oidia (e.g., [17,18,30,48]). The area colonized by P. gigantea (either Rotstop ® , P. gigantea 422 or naturally infected by airborne P. gigantea spores (in the text referred to as wild P. gigantea)) and Heterobasidion spp.…”

Section: Sampling Heterobasidion Spp Infection Assessment and Identification Of P Giganteamentioning

confidence: 99%

Control of Heterobasidion in Norway Spruce Stands: The Impact of Stump Cover on Efficacy of Urea and Phlebiopsis gigantea and Implications for Forest Management

Zaļuma

Sherwood

Brūna

et al. 2021

Forests

View full text Add to dashboard Cite

This study investigated the efficacy of Rotstop®, a native Latvian Phlebiopsis gigantea strain and 35% urea solution in combination with a stump cover treatment to control against natural spore infection by Heterobasidion spp. upon precommercial thinning of Norway spruce in three stands growing on former agricultural lands. The major findings were that (i) infection rates of Heterobasidion spp. on stumps treated with the native P. gigantea strain, Rotstop® or urea are similar when stumps are uncovered, and (ii) stump cover promotes stump colonization by the Latvian P. gigantea strain and Rotstop®, leading to a significantly smaller relative area colonized by Heterobasidion spp., as well greater efficiency against Heterobasidion in comparison with urea. Covering of stumps appears beneficial for controlling Heterobasidion stump colonization and may be valuable to forest owners if used in small-scale operations, but it is impractical in automatized thinnings, where managers should consider using regular Rotstop® without covering the stumps.

show abstract

Natural infection and colonization of pre-commercially cut stumps of Picea abies and Pinus sylvestris by Heterobasidion rot and its biocontrol fungus Phlebiopsis gigantea

Cited by 8 publications

References 25 publications

Inferences on the Susceptibility of Wood of Different Tree Species to Heterobasidion annosum Sensu Lato Primary Infections and on the Range of Pathogen Spores Dispersal

Inferences on the Susceptibility of Wood of Different Tree Species to Heterobasidion annosum Sensu Lato Primary Infections and on the Range of Pathogen Spores Dispersal

Spread of Heterobasidion genotypes in Norway spruce stands on drained peat soil in Latvia

Control of Heterobasidion in Norway Spruce Stands: The Impact of Stump Cover on Efficacy of Urea and Phlebiopsis gigantea and Implications for Forest Management

Contact Info

Product

Resources

About