71. First record of the northern spruce bark beetle, Ips duplicatus (Sahlberg, 1836), in SloveniaAndreja Kavčič, Zina Devetak, Barbara Piškur, Eva Groznik, Maarten De Groot, 2023, original scientific article Abstract: The northern spruce bark beetle, Ips duplicatus (Sahlberg), has invaded Central Europe in the past century and continues to spread southwards and westwards. It has caused damage in some parts of Europe in recent decades and poses a serious threat to spruce forests across the continent. From 2018 to 2021, we conducted intensive monitoring to determine the status of I. duplicatus in Slovenia. We used different types of traps and pheromone lures that attract I. duplicatus beetles and took bark samples from bark beetle-infested trees. Of the 26 traps used during the four years of monitoring, I. duplicatus was found in 16 traps in the central part of Slovenia in 2020. Adult beetles were caught in traps containing both I. typographus and I. duplicatus lures. The identity of this species was confirmed using morphological keys and molecular methods. One to five I. duplicatus beetles were found per trap, totaling 25 specimens. However, we did not confirm any I. duplicatus in samples taken from trees in 2021. We conclude that I. duplicatus is present in Slovenia, but our results suggest that the species is only present locally and that the population is small. Keywords: biological invasions, forest pests, temperate forests, conifers, damage, forest pest monitoring, confirmation Published in DiRROS: 05.09.2023; Views: 342; Downloads: 159 Full text (3,04 MB) This document has many files! More... |
72. Poročilo o preskusu št.: LVG 2023-095 : vzorec št. 2023/00508Nikica Ogris, Špela Hočevar, Barbara Piškur, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Fusarium circinatum, borov smolasti rak, bor, Pinus Published in DiRROS: 04.09.2023; Views: 180; Downloads: 0 |
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74. Poročilo o preskusu št.: LVG 2023-082 : vzorec št. 2023/00483Nikica Ogris, Zina Devetak, Špela Hočevar, Barbara Piškur, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Fusarium circinatum, borov smolasti rak, Pinus, Diplodia pinea Published in DiRROS: 31.08.2023; Views: 214; Downloads: 0 |
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76. Poročilo o preskusu št.: LVG 2023-075 : vzorec št. 2023/00391Barbara Piškur, Špela Hočevar, Nikica Ogris, 2023, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Fusarium circinatum, borov smolasti rak, bor, Pinus Published in DiRROS: 16.08.2023; Views: 191; Downloads: 0 |
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78. Poročilo o preskusu št.: LVG 2023-071 : vzorec št. 2023/00139/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: 235; Downloads: 0 |
79. 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: 253; Downloads: 0 |
80. 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: 299; Downloads: 220 Full text (6,74 MB) This document has many files! More... |