121. Poročilo o preskusu št.: LVG 2022-127 : vzorec št. 2022/00490Nikica Ogris, Zina Devetak, Maša Zagorac, Barbara Piškur, 2022, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Geosmithia morbida, bolezen tisočerih rakov, navadni oreh, Juglans regia
Published in DiRROS: 23.09.2022; Views: 440; Downloads: 0 |
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123. Poročilo o preskusu št.: LVG 2022-121 : vzorec št. 2022/00500/V1Nikica Ogris, Andreja Kavčič, Zina Devetak, Maša Zagorac, Barbara Piškur, 2022, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Geosmithia morbida, bolezen tisočerih rakov, Zeuzera pyrina, modro sitce
Published in DiRROS: 21.09.2022; Views: 409; Downloads: 0 |
124. Poročilo o preskusu št.: LVG 2022-120 : vzorec št. 2022/00403Barbara Piškur, Špela Jagodic, Maša Zagorac, Nikica Ogris, 2022, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, veliki pajesen, Ailanthus altissima, nekroza, izcedek, smola
Published in DiRROS: 21.09.2022; Views: 423; Downloads: 0 |
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126. First report of Diplodia fraxini and Diplodia subglobosa causing canker and dieback of Fraxinus excelsior in SloveniaBenedetto Teodoro Linaldeddu, Carlo Bregant, Lucio Montecchio, Ana Brglez, Barbara Piškur, Nikica Ogris, 2022, short scientific article Abstract: Over the last decades the vitality and productivity of European ash trees in Slovenia has been seriously impacted by the onset of canker and dieback disease symptoms on young and old trees, primarily identified as ash dieback caused by Hymenoscyphus fraxineus. Given the limited information available about the aetiology of this emerging disease, a study was carried out to isolate, identify and characterize the fungal species involved in the observed ash symptoms. Field surveys were conducted in five forest sites where 50 symptomatic branch samples were collected. All samples were inspected and used for fungal isolation. Based on morphology, colony appearance and DNA sequence data of the internal transcribed spacer region (ITS), 125 fungal colonies belonging to five species were isolated and identified. Only a few symptomatic ash samples yielded colonies of H. fraxineus, whereas Botryosphaeriaceae species were isolated with a high frequency, with Diplodia fraxini as the dominant species. A pathogenicity test proved that all isolated species were pathogenic on European ash, causing bark lesions and wood discoloration. All Botryosphaeriaceae species isolated in this study are reported for the first time on European ash in Slovenia.
Keywords: emerging disease, invasive species, Botryosphaeriaceae, pathogenicity
Published in DiRROS: 15.09.2022; Views: 457; Downloads: 190
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129. Where to search: the use of opportunistic data for the detection of an invasive forest pestMaarten De Groot, Nikica Ogris, Mark van der Meij, Michael J.O. Pocock, 2022, original scientific article Abstract: Early detection is important for the management of invasive alien species. In the last decade citizen science has become an important source of such data. Here, we used opportunistic records from the “LIFE ARTEMIS” citizen science project, in which people submitted records from places where they observed tree pests, to understand the distribution of a rapidly-spreading forest pest: the oak lace bug (Corythucha arcuata) in Slovenia. These citizen science records were not distributed randomly. We constructed a species distribution model for C. arcuata that accounted for the biased distribution of citizen science by using the records of other tree pests and diseases from the same project as pseudo-absences (so-called constrained pseudo-absences), and compared this to a model with pseudo-absences selected randomly from across Slovenia. We found that the constrained pseudo-absence model showed that C. arcuata was more likely to be found in east, in places with more oak trees and at lower elevations, and also closer to highways and railways, indicating introduction and dispersal by accidental human transport. The outputs from the model with random pseudo-absences were broadly similar, although estimates from this model tended to be higher and less precise, and some factors that were significant (proximity to minor roads and human settlements) were artefacts of recorder bias, showing the importance of taking the distribution of recording into account wherever possible. The finding that C. arcuata is more likely to be found near highways allows us to design advice for where future citizen science should be directed for efficient early detection.
Keywords: Oak lace bug, ecological modelling, citizen science, invasive alien species, early detection, Corythucha arcuata
Published in DiRROS: 08.09.2022; Views: 495; Downloads: 249
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130. Poročilo o preskusu št.: LVG 2022-088 : vzorec št. 2022/00444Nikica Ogris, Zina Devetak, Špela Jagodic, Barbara Piškur, 2022, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, bor, borov smolasti rak, Fusarium circinatum
Published in DiRROS: 02.09.2022; Views: 383; Downloads: 0 |
