Evaluating the impact of Hymenoscyphus fraxineus in Trentino (Alps, Northern Italy): first investigations
The spread of Hymenoscyphus fraxineus has been causing great concern regarding the survival of European ash (Fraxinus excelsior) throughout Europe since the 1990s. The disease was first recorded in Trentino (southern Alps, Italy) in 2012 and has spread throughout the mountain landscape, where ash tr...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Italian Society of Silviculture and Forest Ecology (SISEF)
2017-12-01
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| Series: | iForest - Biogeosciences and Forestry |
| Subjects: | |
| Online Access: | https://iforest.sisef.org/contents/?id=ifor2486-010 |
| _version_ | 1819042684529016832 |
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| author | Giongo S Oliveira Longa CM Dal Maso E Montecchio L Maresi G |
| author_facet | Giongo S Oliveira Longa CM Dal Maso E Montecchio L Maresi G |
| author_sort | Giongo S |
| collection | DOAJ |
| description | The spread of Hymenoscyphus fraxineus has been causing great concern regarding the survival of European ash (Fraxinus excelsior) throughout Europe since the 1990s. The disease was first recorded in Trentino (southern Alps, Italy) in 2012 and has spread throughout the mountain landscape, where ash trees are scattered in small and isolated stands in different valleys. The status of the disease was checked by monitoring the damage to natural regeneration and adult trees in 90 sites spread over the whole region. The survey confirmed the complete colonization by the pathogen of the whole investigated area, with high levels of damage to both young and adult ash trees. Regeneration (both seedlings and saplings) was observed to be affected by the fungus in 88 plots out of 90. Out of 4486 examined young European ashes, 2261 (50.4%) were affected and 789 (17.6%) were already dead. Ten of the 384 assayed flowering ashes (Fraxinus ornus) showed symptoms on branches and apical stems, similar to those observed for European ash. Isolation and molecular analysis proved the presence of the fungus on both symptomatic European and flowering ashes. The examined 386 adult trees showed different levels of damage, sometimes reaching more than 75% of the crown. Some individual trees (42) growing close to severely damaged trees appeared fully healthy, which suggests the possible existence of some resistant/tolerant individuals in the examined populations. |
| first_indexed | 2024-12-21T09:44:48Z |
| format | Article |
| id | doaj.art-7e19ee5908b641feb094686802fa1233 |
| institution | Directory Open Access Journal |
| issn | 1971-7458 1971-7458 |
| language | English |
| last_indexed | 2024-12-21T09:44:48Z |
| publishDate | 2017-12-01 |
| publisher | Italian Society of Silviculture and Forest Ecology (SISEF) |
| record_format | Article |
| series | iForest - Biogeosciences and Forestry |
| spelling | doaj.art-7e19ee5908b641feb094686802fa12332022-12-21T19:08:22ZengItalian Society of Silviculture and Forest Ecology (SISEF)iForest - Biogeosciences and Forestry1971-74581971-74582017-12-0110187187810.3832/ifor2486-0102486Evaluating the impact of Hymenoscyphus fraxineus in Trentino (Alps, Northern Italy): first investigationsGiongo S0Oliveira Longa CM1Dal Maso E2Montecchio L3Maresi G4Fondazione Edmund Mach, Centre for Technology Transfer, v. E. Mach 1, 38010 San Michele all’Adige, TN (Italy)Fondazione Edmund Mach, Research and Innovation Centre, Department of Sustainable Agroecosystems and Bioresources, San Michele all’Adige, TN (Italy)University of Padova, Department of Land, Environment, Agriculture and Forestry, v.le dell’Università 16, 35020 Legnaro, PD (Italy)University of Padova, Department of Land, Environment, Agriculture and Forestry, v.le dell’Università 16, 35020 Legnaro, PD (Italy)Fondazione Edmund Mach, Centre for Technology Transfer, v. E. Mach 1, 38010 San Michele all’Adige, TN (Italy)The spread of Hymenoscyphus fraxineus has been causing great concern regarding the survival of European ash (Fraxinus excelsior) throughout Europe since the 1990s. The disease was first recorded in Trentino (southern Alps, Italy) in 2012 and has spread throughout the mountain landscape, where ash trees are scattered in small and isolated stands in different valleys. The status of the disease was checked by monitoring the damage to natural regeneration and adult trees in 90 sites spread over the whole region. The survey confirmed the complete colonization by the pathogen of the whole investigated area, with high levels of damage to both young and adult ash trees. Regeneration (both seedlings and saplings) was observed to be affected by the fungus in 88 plots out of 90. Out of 4486 examined young European ashes, 2261 (50.4%) were affected and 789 (17.6%) were already dead. Ten of the 384 assayed flowering ashes (Fraxinus ornus) showed symptoms on branches and apical stems, similar to those observed for European ash. Isolation and molecular analysis proved the presence of the fungus on both symptomatic European and flowering ashes. The examined 386 adult trees showed different levels of damage, sometimes reaching more than 75% of the crown. Some individual trees (42) growing close to severely damaged trees appeared fully healthy, which suggests the possible existence of some resistant/tolerant individuals in the examined populations.https://iforest.sisef.org/contents/?id=ifor2486-010Ash DiebackFraxinus excelsiorFraxinus ornusNatural RegenerationForest Management |
| spellingShingle | Giongo S Oliveira Longa CM Dal Maso E Montecchio L Maresi G Evaluating the impact of Hymenoscyphus fraxineus in Trentino (Alps, Northern Italy): first investigations iForest - Biogeosciences and Forestry Ash Dieback Fraxinus excelsior Fraxinus ornus Natural Regeneration Forest Management |
| title | Evaluating the impact of Hymenoscyphus fraxineus in Trentino (Alps, Northern Italy): first investigations |
| title_full | Evaluating the impact of Hymenoscyphus fraxineus in Trentino (Alps, Northern Italy): first investigations |
| title_fullStr | Evaluating the impact of Hymenoscyphus fraxineus in Trentino (Alps, Northern Italy): first investigations |
| title_full_unstemmed | Evaluating the impact of Hymenoscyphus fraxineus in Trentino (Alps, Northern Italy): first investigations |
| title_short | Evaluating the impact of Hymenoscyphus fraxineus in Trentino (Alps, Northern Italy): first investigations |
| title_sort | evaluating the impact of hymenoscyphus fraxineus in trentino alps northern italy first investigations |
| topic | Ash Dieback Fraxinus excelsior Fraxinus ornus Natural Regeneration Forest Management |
| url | https://iforest.sisef.org/contents/?id=ifor2486-010 |
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