Urea treatment reduced Heterobasidion annosum s.l. root rot in Picea abies after 15 years

Oliva, Jonàs; Samils, Nicklas; Johansson, Ulf; Bendz‐Hellgren, Malin; Stenlid, Jan

doi:10.1016/j.foreco.2008.01.063

Cited by 44 publications

(48 citation statements)

References 30 publications

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“…The simulation results were well in line with several field studies observing the increase of stand vulnerability to wind due to root rot (Whitney et al, 2002;Oliva et al, 2008;Suvanto et al, 2016). However, the significance of wind damaged trees to the potentiality of bark beetle outbreak was not observed as clearly as it is often in many field studies (e.g.…”

Section: Interaction Between Disturbance Agentssupporting

confidence: 86%

“…Komonen et al, 2011). Trees recently exposed to wind (in thinned stands or stands adjacent to clear-cut stands) which are not yet adapted to the new wind conditions are especially susceptible to wind damages (Laiho, 1987;Zubizarreta-Gerendiain et al, 2012;Suvanto et al, 2016) as well as are stands infected with root diseases, such as Heterobasidion root rot (Whitney et al, 2002;Oliva et al, 2008).…”

Section: Wind Stormsmentioning

confidence: 99%

“…Root rot, caused by fungal pathogens such as Heterobasidion sp. and Armillaria sp., decreases the mechanical strength of wood in the roots and stem and hence affects the resistive moments of the root soil plate and stem making the trees more vulnerable to uprooting and stem breakage (Bazzigher and Schmid, 1969;Gordon, 1973;Whitney et al, 2002;Oliva et al, 2008). Decay in the root system and especially in the large, anchoring roots decreases the mechanical strength of the root system decreasing the effective size of the root-soil plate (Fraser, 1962;Bergeron et al, 2009;Giordano et al, 2012).…”

Section: Wind Stormsmentioning

confidence: 99%

“…Although several tree-pulling experiments and stand level inventories have shown that root rot plays a major role in increasing tree and stand vulnerability to wind (Fraser, 1962;Whitney et al, 2002;Oliva et al, 2008;Giordano et al, 2012), there are still several gaps in the what is known about the mechanisms especially considering the effect of wood decay on root system strength.…”

Section: Major Advancements Of the Developed Modelsmentioning

confidence: 99%

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Integrating mechanistic disturbance models and stand dynamics of Norway spruce

Honkaniemi¹

2017

Diss. For.

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Disturbances, caused by abiotic and biotic agents, are discrete events in time disrupting the ecosystem and resulting in the reduction of plant biomass. They play a key role in forest ecosystems, but in the managed forests pose a risk to forest productivity. The projected climate change is expected to increase the risk of various disturbances in the boreal forests. In Europe, the major risks threatening the Norway spruce (Picea abies) dominated stands are caused by Heterobasidion root rot, wind storms, and European spruce bark beetle (Ips typographus). Heterobasidion root rot causes growth losses, mortality and decreases the timber quality. It also decreases the mechanical stability of the tree against wind load and increases the stand vulnerability for wind damages. Bark beetles benefit from the low resistance breeding material, i.e., wind damaged trees, when the population is low and can emerge as outbreaks in the right conditions. This thesis presents a simulation framework WINDROT to simulate the interactive dynamics of these disturbance agents. WINDROT consists of four simulation models, each responsible for either the dynamics of the host or one of the disturbance agents. A stand level decision support system, MOTTI, simulates the growth and dynamics of tree stands as affected by forest management, and provides inputs for mechanistic models Hmodel, HWIND and BBDYN simulating the dynamics and effects of disturbance agents. The model performance analyses in tree and stand scale showed that; i) the Heterobasidion dynamics are driven by primary and secondary infections on large stumps; ii) increasing intensity of Heterobasidion root rot damages increases the risk for wind damages; and iii) the increasing wind damages increased the subsequent bark beetle damages. The simulation framework can be used to analyze the sensitivity of different forest management regimes to the risks posed by these damages alone and in various combinations.

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Section: Interaction Between Disturbance Agentssupporting

confidence: 86%

Section: Wind Stormsmentioning

confidence: 99%

Section: Wind Stormsmentioning

confidence: 99%

Section: Major Advancements Of the Developed Modelsmentioning

confidence: 99%

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Integrating mechanistic disturbance models and stand dynamics of Norway spruce

Honkaniemi¹

2017

Diss. For.

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“…Sims et al [5] found that 17% of Scots pine and 12% of Norway spruce mortality in managed forests is directly caused by diseases, including root rots. For some wind-thrown trees, where wind-throw affected 10% of Scots pine and 26% of Norway spruce, the mortality may also indirectly be caused by root rot [6,7]. Root rot spreads in a stand by air-or soilborne propagules, creating clumps of infected trees.…”

Section: Introductionmentioning

confidence: 99%

Vitality Assessment of Visually Healthy Trees in Estonia

Allikmäe

Laarmann

Korjus

2017

Forests

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Root rots are considered the most important forest diseases in Estonia, causing serious concern in forest management. The majority of trees infected by forest pathogens lack easily-detectable visual symptoms, making it difficult to detect decay in a tree. We assessed the general health condition of visually healthy trees in intensively managed Norway spruce (Picea abies L. Karst.) and Scots pine (Pinus sylvestris L.) stands with resistography in order to identify trees infected by root rot. We found that 8.0% of Norway spruces and 1.6% of Scots pines had well-developed internal decay on the root collar regardless of having no external symptoms of root rot. Visually healthy trees growing on permanent forest land experienced more decay than trees growing on former agricultural land. The radial proportion of decay of damaged trees was 61% in Norway spruces and 35% in Scots pines. The results suggest that resistography can be used as a reliable method for tree vitality assessment.

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Forest Disease Affecting Pines in the Mediterranean Basin

Oliva

2021

Pines and Their Mixed Forest Ecosystems in the Mediterranean Basin

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Urea treatment reduced Heterobasidion annosum s.l. root rot in Picea abies after 15 years

Cited by 44 publications

References 30 publications

Integrating mechanistic disturbance models and stand dynamics of Norway spruce

Integrating mechanistic disturbance models and stand dynamics of Norway spruce

Vitality Assessment of Visually Healthy Trees in Estonia

Forest Disease Affecting Pines in the Mediterranean Basin

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