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323. Poročilo o preskusu št.: LVG 2021-015 : opis vzorca: LVG2021/00014: Ulmus, les, lubje, sekanci, LVG2021/00015/V1: Pinus nigra, veja (z listi ali brez) ali poganjki, LVG2021/00016/V2: Pinus sylvestris, veja (z listi ali brez) ali poganjki, LVG2021/00017/V3: Pinus sylvestris, veja (z listi ali brez) ali poganjki, LVG2021/00018/V4: Pinus sylvestris, veja (z listi ali brez) ali poganjki, LVG2021/00022/mdg: Pinus sylvestris, žuželka, LVG2021/00019: Pseudotsuga menziesii, veja (z listi ali brez) ali poganjki : namen testiranja: LVG2021/00014: sum na: Scolytus, LVG2021/00015/V1: sum na: Dothistroma, LVG2021/00016/V2: sum na: Diplodia pinea, LVG2021/00017/V3: sum na: Diplodia pinea, LVG2021/00018/V4: sum na: Dothistroma, LVG2021/00022/mdg: sum na: Fitofagna žuželka, LVG2021/00019: sum na: GlivaNikica Ogris, Tašja Cvelbar, Zina Devetak, Maarten De Groot, Barbara Piškur, 2021, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize
Published in DiRROS: 15.04.2021; Views: 748; Downloads: 225
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324. Drought stress can induce the pathogenicity of Cryptostroma corticale, the causal agent of sooty bark disease of sycamore mapleNikica Ogris, Ana Brglez, Barbara Piškur, 2021, original scientific article Abstract: Reports of sooty bark disease of maples caused by the fungus Cryptostroma corticale have recently been emerging from across Europe. The aims of our study were to describe the first report of sooty bark disease in Slovenia, to determine the pathogenicity of C. corticale, to confirm the optimum temperature for the growth of the fungus, and to determine the mass loss of Acer pseudoplatanus wood inoculated by C. corticale. We confirmed the presence of C. corticale on A. pseudoplatanus via morphological and molecular analysis. The optimal growth of C. corticale was measured in vitro on potato dextrose agar and was determined to occur at 25 °C. Pathogenicity tests were performed on 30 saplings of A. pseudoplatanus under two treatments, humid and drought stress, and the fungus was pathogenic in both treatments. The mean length of bark lesions and wood discoloration of the drought-stressed saplings was significantly greater than that in the humid treatment. Re-isolations of C. corticale were successful from all inoculated saplings, and thus Koch%s postulates were confirmed. The mass loss of A. pseudoplatanus wood was determined by mini-block test in a period of 10 weeks and was observed as minimal. Based on the results, we conclude that C. corticale is a weak and opportunistic pathogen that most likely expresses itself intensively under hot and dry conditions.
Keywords: pathogenicity, drought stress, optimal growth, climate change, mass loss, mini-block test, wood rot, opportunistic pathogen, saprophyte, endophyte
Published in DiRROS: 23.03.2021; Views: 1163; Downloads: 877
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326. Poročilo o preskusu št.: LVG 2021-001 : opis vzorca: Acer pseudoplatanus, les, lubje, sekanci : namen testiranja: sum na: glivaBarbara Piškur, Tašja Cvelbar, Zina Devetak, Špela Jagodic, Nikica Ogris, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, gorski javor, Acer pseudoplatanus, kompleksna bolezen, Fusarium, Neocucurbitaria acerina, Neonectria
Published in DiRROS: 05.03.2021; Views: 1058; Downloads: 0 |
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329. Worldwide genetic structure elucidates the Eurasian origin and invasion pathways of Dothistroma septosporum, causal agent of Dothistroma needle blightMartin S. Mullett, Rein Drenkhan, Kalev Adamson, Piotr Boroń, Anna Lenart-Boroń, Irene Barnes, Michal Tomšovský, Zuzana Jánošíková, Katarína Adamčíková, Emília Ondrušková, Barbara Piškur, Tine Hauptman, 2021, original scientific article Abstract: Dothistroma septosporum, the primary causal agent of Dothistroma needle blight, is one of the most significant foliar pathogens of pine worldwide. Its wide host and environmental ranges have led to its global success as a pathogen and severe economic damage to pine forests in many regions. This comprehensive global population study elucidated the historical migration pathways of the pathogen to reveal the Eurasian origin of the fungus. When over 3800 isolates were examined, three major population clusters were revealed: North America, Western Europe, and Eastern Europe, with distinct subclusters in the highly diverse Eastern European cluster. Modeling of historical scenarios using approximate Bayesian computation revealed the North American cluster was derived from an ancestral population in Eurasia. The Northeastern European subcluster was shown to be ancestral to all other European clusters and subclusters. The Turkish subcluster diverged first, followed by the Central European subcluster, then the Western European cluster, which has subsequently spread to much of the Southern Hemisphere. All clusters and subclusters contained both mating-types of the fungus, indicating the potential for sexual reproduction, although asexual reproduction remained the primary mode of reproduction. The study strongly suggests the native range of D. septosporum to be in Eastern Europe (i.e., the Baltic and Western Russia) and Western Asia.
Keywords: Mycosphaerella pini, biogeography, ABC, DNB, global spread, introduction pathways, invasive pathogen, global spread
Published in DiRROS: 09.02.2021; Views: 1267; Downloads: 794
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330. Poročilo o preskusu št.: LVG 2020-371 : opis vzorca:Pinus, les, lubje, sekanci : namen testiranja: sum na: Fusarium circinatumNikica Ogris, Barbara Piškur, Andreja Kavčič, Tašja Cvelbar, Špela Jagodic, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize
Published in DiRROS: 11.12.2020; Views: 878; Downloads: 0 |
