Stem rot and wilt on <em>Euonymus</em>
In August 2008, stem rot and wilt symptoms of unknown origin were observed on Euonymus japonica. From the symptomatic stem base a fungus belonging to the genus Calonectria (anamorph: Cylindrocladium) was isolated (isolate JKI 2140). The isolate was morphologically very similar to Calonectria colhoun...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | deu |
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Julius Kühn-Institut
2015-10-01
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| Series: | Journal für Kulturpflanzen |
| Subjects: | |
| Online Access: | https://ojs.openagrar.de/index.php/Kulturpflanzenjournal/article/view/12612 |
| _version_ | 1818906192325378048 |
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| author | Ulrike Brielmaier-Liebetanz Sabine Werres Stefan Wagner Roswitha Ulrich |
| author_facet | Ulrike Brielmaier-Liebetanz Sabine Werres Stefan Wagner Roswitha Ulrich |
| author_sort | Ulrike Brielmaier-Liebetanz |
| collection | DOAJ |
| description | In August 2008, stem rot and wilt symptoms of unknown origin were observed on Euonymus japonica. From the symptomatic stem base a fungus belonging to the genus Calonectria (anamorph: Cylindrocladium) was isolated (isolate JKI 2140). The isolate was morphologically very similar to Calonectria colhounii as well as to Ca. fujianensis and Ca. pseudocolhounii, except for the larger conidia. Sequence analysis of genes (ITS, BT, TEF-1α, HIS3) showed high similarity to Ca. colhounii, Ca. eucalypti, Ca. fujianensis and Ca. pseudocolhounii. The taxonomic status of the fungal isolate from E. japonica is not yet clear. It belongs to the complex Ca. colhounii but a definitive allocation to or separation from a known Calonectria species is not possible on the basis of a single isolate. The fungus is provisionally named Calonectria colhounii compl.
The pathogenicity of the fungus was tested on E. japonica and E. fortunei. The disease symptoms originally observed on field plants of E. japonica were reproduced and the fungus was re-isolated. Thus the pathogenicity of isolate JKI 2140 on both Euonymus species is proved. Since the first occurrence of this infestation there were no further notifications of stem canker and wilt on Euonymus spp. in Germany. Therefore the importance of this pathogen on Euonymus is considered to be low.
DOI: 10.5073/JfK.2015.10.01, https://doi.org/10.5073/JfK.2015.10.01 |
| first_indexed | 2024-12-19T21:35:19Z |
| format | Article |
| id | doaj.art-88e32bb9d66e4e799f40125b0fab0837 |
| institution | Directory Open Access Journal |
| issn | 1867-0911 1867-0938 |
| language | deu |
| last_indexed | 2024-12-19T21:35:19Z |
| publishDate | 2015-10-01 |
| publisher | Julius Kühn-Institut |
| record_format | Article |
| series | Journal für Kulturpflanzen |
| spelling | doaj.art-88e32bb9d66e4e799f40125b0fab08372022-12-21T20:04:48ZdeuJulius Kühn-InstitutJournal für Kulturpflanzen1867-09111867-09382015-10-016710Stem rot and wilt on <em>Euonymus</em>Ulrike Brielmaier-Liebetanz0Sabine Werres1Stefan Wagner2Roswitha Ulrich3Julius Kühn-Institut – Federal Research Centre for Cultivated Plants, Institute for Plant Protection in Horticulture and ForestsJulius Kühn-Institut – Federal Research Centre for Cultivated Plants, Institute for Plant Protection in Horticulture and ForestsJulius Kühn-Institut – Federal Research Centre for Cultivated Plants, Institute for Plant Protection in Horticulture and ForestsDistrict Government of Giessen, Dez.51.4 Plant protection service HesseIn August 2008, stem rot and wilt symptoms of unknown origin were observed on Euonymus japonica. From the symptomatic stem base a fungus belonging to the genus Calonectria (anamorph: Cylindrocladium) was isolated (isolate JKI 2140). The isolate was morphologically very similar to Calonectria colhounii as well as to Ca. fujianensis and Ca. pseudocolhounii, except for the larger conidia. Sequence analysis of genes (ITS, BT, TEF-1α, HIS3) showed high similarity to Ca. colhounii, Ca. eucalypti, Ca. fujianensis and Ca. pseudocolhounii. The taxonomic status of the fungal isolate from E. japonica is not yet clear. It belongs to the complex Ca. colhounii but a definitive allocation to or separation from a known Calonectria species is not possible on the basis of a single isolate. The fungus is provisionally named Calonectria colhounii compl. The pathogenicity of the fungus was tested on E. japonica and E. fortunei. The disease symptoms originally observed on field plants of E. japonica were reproduced and the fungus was re-isolated. Thus the pathogenicity of isolate JKI 2140 on both Euonymus species is proved. Since the first occurrence of this infestation there were no further notifications of stem canker and wilt on Euonymus spp. in Germany. Therefore the importance of this pathogen on Euonymus is considered to be low. DOI: 10.5073/JfK.2015.10.01, https://doi.org/10.5073/JfK.2015.10.01https://ojs.openagrar.de/index.php/Kulturpflanzenjournal/article/view/12612CalonectriaCylindrocladiumEuonymusornamental shrubsymptomsmorphology |
| spellingShingle | Ulrike Brielmaier-Liebetanz Sabine Werres Stefan Wagner Roswitha Ulrich Stem rot and wilt on <em>Euonymus</em> Journal für Kulturpflanzen Calonectria Cylindrocladium Euonymus ornamental shrub symptoms morphology |
| title | Stem rot and wilt on <em>Euonymus</em> |
| title_full | Stem rot and wilt on <em>Euonymus</em> |
| title_fullStr | Stem rot and wilt on <em>Euonymus</em> |
| title_full_unstemmed | Stem rot and wilt on <em>Euonymus</em> |
| title_short | Stem rot and wilt on <em>Euonymus</em> |
| title_sort | stem rot and wilt on em euonymus em |
| topic | Calonectria Cylindrocladium Euonymus ornamental shrub symptoms morphology |
| url | https://ojs.openagrar.de/index.php/Kulturpflanzenjournal/article/view/12612 |
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