81. Poročilo o preskusu št.: LVG 2023-070 : vzorec št. 2023/00373/THTine Hauptman, Matija Kadunc, Špela Hočevar, Zina Devetak, Barbara Piškur, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Dothistroma, rjavenje borovih iglic, Lecanosticta acicola, rdeča pegavost borovih iglic, bori, Pinus
Published in DiRROS: 16.08.2023; Views: 255; Downloads: 0 |
82. Diversity of phytophthora species involved in new diseases of mountain vegetation in Europe with the description of phytophthora pseudogregata sp. nov.Carlo Bregant, Giovanni Rossetto, Letizia Meli, Nicolò Sasso, Lucio Montecchio, Ana Brglez, Barbara Piškur, Nikica Ogris, Lucia Maddau, Benedetto Teodoro Linaldeddu, 2023, original scientific article Abstract: New and emerging Phytophthora-related diseases in small trees, shrubs and herbaceous plants typical of subalpine vegetation have recently been observed in Italy and Slovenia. Diseased plants showed a complex symptomatology including foliar necrosis, fruit rot, shoot blight and branch bleeding cankers. Since little information is available about the aetiology of these aerial Phytophthora diseases, from 2019 to 2022, field surveys were conducted in 54 sites to define the occurrence, distribution and impact of the Phytophthora species on mountain vegetation. A total of 360 Phytophthora isolates were obtained from 397 samples collected from 33 herbaceous and woody host species. Based on phylogenetic analysis and morphometric data, 17 Phytophthora species were identified: P. pseudosyringae (201 isolates), P. plurivora (54), P. gonapodyides (21), P. ilicis (20), P. alpina (17), P. acerina (11), P. cactorum (7), P. pseudocryptogea (6), P. cambivora (5), P. idaei (4), P. psychrophila (3), P. bilorbang (2), P. chlamydospora (2), P. hedraiandra (1), P. kelmanii (1), P. rosacearum (1) and P. syringae (1). In addition, three isolates of a new putative Phytophthora species obtained from Alnus viridis, Juniperus communis and Rhododendron ferrugineum are described here as Phytophthora pseudogregata sp. nov. Overall, the results highlighted an unexpectedly high diversity of Phytophthora species in mountain areas, with many species able to cause aerial infections due to the production of caducous sporangia.
Keywords: alpine regions, emerging disease, oomycetes, foliar necrosis, ITS clade 6, phylogeny
Published in DiRROS: 01.08.2023; Views: 302; Downloads: 221
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84. Poročilo o preskusu št.: LVG 2023-069 : vzorec št. 2023/00372Nikica Ogris, Špela Hočevar, Zina Devetak, Barbara Piškur, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Geosmithia morbida, bolezen tisočerih rakov, Juglans
Published in DiRROS: 28.07.2023; Views: 242; Downloads: 0 |
85. Poročilo o preskusu št.: LVG 2023-068 : vzorec št. 2023/00364Nikica Ogris, Špela Hočevar, Zina Devetak, Barbara Piškur, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Geosmithia morbida, bolezen tisočerih rakov, Juglans
Published in DiRROS: 28.07.2023; Views: 254; Downloads: 0 |
86. Poročilo o preskusu št.: LVG 2023-066 : vzorec št. 2023/00355Nikica Ogris, Špela Hočevar, Zina Devetak, Barbara Piškur, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Fusarium circinatum, borov smolasti rak, Pinus
Published in DiRROS: 28.07.2023; Views: 245; Downloads: 0 |
87. Climate, host and geography shape insect and fungal communities of treesIva Franić, Eric Allan, Simone Prospero, Kalev Adamson, Fabio Attorre, Marie-Anne Auger-Rozenberg, Sylvie Augustin, Dimitrios N. Avtzis, Wim Baert, Marek Barta, Maarten De Groot, Barbara Piškur, 2023, original scientific article Abstract: Non-native pests, climate change, and their interactions are likely to alter relationships between trees and tree-associated organisms with consequences for forest health. To understand and predict such changes, factors structuring tree-associated communities need to be determined. Here, we analysed the data consisting of records of insects and fungi collected from dormant twigs from 155 tree species at 51 botanical gardens or arboreta in 32 countries. Generalized dissimilarity models revealed similar relative importance of studied climatic, host-related and geographic factors on differences in tree-associated communities. Mean annual temperature, phylogenetic distance between hosts and geographic distance between locations were the major drivers of dissimilarities. The increasing importance of high temperatures on differences in studied communities indicate that climate change could affect tree-associated organisms directly and indirectly through host range shifts. Insect and fungal communities were more similar between closely related vs. distant hosts suggesting that host range shifts may facilitate the emergence of new pests. Moreover, dissimilarities among tree-associated communities increased with geographic distance indicating that human-mediated transport may serve as a pathway of the introductions of new pests. The results of this study highlight the need to limit the establishment of tree pests and increase the resilience of forest ecosystems to changes in climate.
Keywords: mycology, insects, fungus, community of organisms, influence of the host, influence of climate, influence of geography
Published in DiRROS: 19.07.2023; Views: 330; Downloads: 190
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89. Poročilo o preskusu št.: LVG 2023-061 : vzorec št. 2023/00057Barbara Piškur, Maarten De Groot, Ana Brglez, Špela Hočevar, Špela Jagodic, Tine Hauptman, Nikica Ogris, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, glive
Published in DiRROS: 17.07.2023; Views: 256; Downloads: 80
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