Comparison of Gremmeniella ahietina historical damage to Scots pines
Fifteen Scots pine (Pinussylvestris L.) trees that were slightly, moderately, or severely damaged by Gremmeniellaabietina (Lagerb.) Morelet were felled in northern Finland to determine the disease history of the stand. The annual level of damage was determined by counting the scars and cankers on al...
| Published in: | Canadian Journal of Forest Research |
|---|---|
| Main Authors: | , |
| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
Canadian Science Publishing
1995
|
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1139/x95-163 http://www.nrcresearchpress.com/doi/pdf/10.1139/x95-163 |
| Summary: | Fifteen Scots pine (Pinussylvestris L.) trees that were slightly, moderately, or severely damaged by Gremmeniellaabietina (Lagerb.) Morelet were felled in northern Finland to determine the disease history of the stand. The annual level of damage was determined by counting the scars and cankers on all the first-order branches. Annual branch leader changes (dead shoots), branch mortality, and attacks caused by shoot beetles, Tomicus spp., were also determined. Most of the G. abietina damage occurred in the middle and late 1980s. However, the damage occurred at low levels in the stand as early as in the 1940s, demonstrating that the history of the disease followed the established pattern noticed earlier in eastern Lapland. For slightly damaged trees, most damage occurred in the mid-1980s, while for their severely damaged counterparts most damage occurred in the late 1980s. |
|---|