Survey Study Reveals High Prevalence of Heterobasidion Root Rot Infection in Scots Pine (Pinus sylvestris) Stands Established on Seemingly Low-Risk Sites
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Sites
2.2. Sample Collection and Identification of Infected Trees
2.3. Microscopy Analysis
2.4. Defoliation Assessment
2.5. Statistical Analysis
3. Results
3.1. The Prevalence of Heterobasidion Infection on Low-Risk Sites
3.2. Relation between Infection Frequency and Stand Characters (Site Index, Stand Age)
3.3. Relationship between Infection Frequency and Tree Characteristics (Tree Volume, Root Diameter, Crown Defoliation)
4. Discussion
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Stand Id | Site Name | Location | Stand Age (yr) | Site Index | Soil Type | Previous Tree Species | Number of Thinnings | Number of Uprooted Trees | Number of Infected Trees | Infection Frequency (%) |
---|---|---|---|---|---|---|---|---|---|---|
1 | Svenljunga | 57°28′42.0″ N 12°52′27.0″ E | 38 | T25 | Moraine | Scots pine + Norway spruce | 3 | 15 | 0 | 0 |
2 | Västervik | 57°38′15.3″ N 16°37′00.1″ E | 52 | T18 | Moraine | - * | - ** | 15 | 0 | 0 |
3 | Västervik | 57°37′24.2″ N 16°38′03.8″ E | 47 | T21 | Moraine | - * | - ** | 15 | 0 | 0 |
4 | Norrköping | 58°45′48.3″ N 16°15′22.4″ E | 42 | T29 | Silty clay | - * | 1 | 15 | 5 | 33.33 |
5 | Skövde | 58°26′53.2″ N 13°56′35.3″ E | 37 | T24 | Glacial sediments | Scots pine | 1 | 15 | 2 | 13.33 |
6 | Österbymo | 57°48′05.4″ N 15°19′48.4″ E | 62 | T25 | Moraine | Scots pine | 2 | 15 | 2 | 13.33 |
7 | Boxholm | 58°09′40.4″ N 15°04′27.3″ E | 45 | T27 | Moraine | Norway spruce | 1 | 15 | 3 | 20 |
8 | London Grytfall | 58°07′29.8″ N 15°18′09.8″ E | 58 | T26 | Moraine | Scots pine | 2 | 15 | 3 | 20 |
9 | Simonstorp | 58°48′51.4″ N 16°06′05.7″ E | 36 | T28 | Moraine | Scots pine | 1 | 15 | 5 | 33.33 |
total | 135 | 20 | 14.8 |
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Youssef, K.; Dambrauskaite, M.; Witzell, J.; Rönnberg, J. Survey Study Reveals High Prevalence of Heterobasidion Root Rot Infection in Scots Pine (Pinus sylvestris) Stands Established on Seemingly Low-Risk Sites. Forests 2023, 14, 1018. https://doi.org/10.3390/f14051018
Youssef K, Dambrauskaite M, Witzell J, Rönnberg J. Survey Study Reveals High Prevalence of Heterobasidion Root Rot Infection in Scots Pine (Pinus sylvestris) Stands Established on Seemingly Low-Risk Sites. Forests. 2023; 14(5):1018. https://doi.org/10.3390/f14051018
Chicago/Turabian StyleYoussef, Khaled, Milda Dambrauskaite, Johanna Witzell, and Jonas Rönnberg. 2023. "Survey Study Reveals High Prevalence of Heterobasidion Root Rot Infection in Scots Pine (Pinus sylvestris) Stands Established on Seemingly Low-Risk Sites" Forests 14, no. 5: 1018. https://doi.org/10.3390/f14051018
APA StyleYoussef, K., Dambrauskaite, M., Witzell, J., & Rönnberg, J. (2023). Survey Study Reveals High Prevalence of Heterobasidion Root Rot Infection in Scots Pine (Pinus sylvestris) Stands Established on Seemingly Low-Risk Sites. Forests, 14(5), 1018. https://doi.org/10.3390/f14051018