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324. Poročilo o preskusu št.: LVG 2020-194 : opis vzorca: Acer pseudoplatanus, les, lubje, sekanci : namen testiranja: sum na: kompleksna bolezenNikica Ogris, Barbara Piškur, Zina Devetak, Tašja Cvelbar, Špela Jagodic, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize Published in DiRROS: 19.10.2020; Views: 804; Downloads: 0 |
325. Poročilo o preskusu št.: LVG 2020-193 : opis vzorca: Acer pseudoplatanus, les, lubje, sekanci : namen testiranja: sum na: endofitiNikica Ogris, Barbara Piškur, Maarten De Groot, Tašja Cvelbar, Zina Devetak, Špela Jagodic, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize Published in DiRROS: 19.10.2020; Views: 908; Downloads: 0 |
326. In vitro interactions between Eutypella parasitica and some frequently isolated fungi from the wood of the dead branches of young Sycamore Maple (Acer pseudoplatanus)Ana Brglez, Barbara Piškur, Nikica Ogris, 2020, original scientific article Abstract: The ten most frequently isolated fungi from the wood of the dead branches of Acer pseudoplatanus L. were tested in dual cultures to evaluate their in vitro antagonistic activity against Eutypella parasitica R.W. Davidson and R.C. Lorenz, the causative agent of a destructive disease of maples in Europe and North America. The tested fungi, treated also as challenge isolates, were Diaporthe sp., Eutypa sp., Eu. maura, E. parasitica, Fusarium avenaceum, Neocucurbitaria acerina, Neonectria sp., Peniophora incarnata, Petrakia irregularis, and Phomopsis pustulata. The antagonistic ability of each challenge isolate was evaluated by calculating an index of antagonism (AI) based on the interaction type in the dual cultures. The results of competition between the fungal isolates were quantified after re-isolations from the interaction zone (s). The dual cultures revealed two main types of competitive interactions: Deadlock, consisting of mutual inhibition after mycelial contact or at a distance, and replacement, reflecting in the inhibition of E. parasitica, followed by partial overgrowth by the replacing fungus. Statistical analysis showed significant differences in average AI and s of challenge isolates between different dual culture assays. Based on the results of the antagonism index, Eutypa sp., Eu. maura, Neonectria sp., and P. incarnata had the highest inhibitory effect on E. parasitica growth and were recognized as the most promising candidates for further biocontrol studies of E. parasitica. The mycelium of E. parasitica at the interaction zones remained mostly viable, except in dual cultures with Eutypa sp., F. avenaceum, and Neonectria sp., where re-isolations did not yield any colony of the E. parasitica isolate. Based on the results, we assume that E. parasitica is a weak competitor, which invests less energy in direct mycelial competition. We discuss the potential of the observed antagonists as a possible biocontrol of Eutypella canker of maple. Nevertheless, additional experiments should be performed for a solid conclusion about competitive ability of E. parasitica and usefulness of antagonists as biocontrol. Keywords: Eutypella parasitica, dual culture, hyphal interaction, deadlock, replacement, competition, antagonism, inhibition, re-isolation, biocontrol Published in DiRROS: 19.10.2020; Views: 1335; Downloads: 873
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327. Poročilo o preskusu št.: LVG 2020-191 : opis vzorca: 11459927: Juglans regia, veja (z listi ali brez) ali poganjki, 11459934: Juglans regia, veja (z listi ali brez) ali poganjki, 11459873: Juglans regia, veja (z listi ali brez) ali poganjki, 11459880: Juglans regia, veja (z listi ali brez) ali poganjki, 11459903: Juglans regia, veja (z listi ali brez) ali poganjki, 11459897: Juglans regia, veja (z listi ali brez) ali poganjki : namen testiranja: 11459927: sum na: Geosmithia morbida, 11459934: sum na: Geosmithia morbida, 11459873: sum na: Geosmithia morbida, 11459880: sum na: Geosmithia morbida, 11459903: sum na: Geosmithia morbida, 11459897: sum na: Geosmithia morbidaNikica Ogris, Barbara Piškur, Andreja Kavčič, Špela Jagodic, Zina Devetak, Tašja Cvelbar, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize Published in DiRROS: 08.10.2020; Views: 959; Downloads: 0 |
328. Poročilo o preskusu št.: LVG 2020-189 : opis vzorca: 11582946: Pinus sylvestris, cela rastlina, 11582953: Pinus sylvestris, veja (z listi ali brez) ali poganjki : namen testiranja: 11582946: sum na: Gibberella circinata, 11582953: sum na: Gibberella circinataNikica Ogris, Barbara Piškur, Zina Devetak, Tašja Cvelbar, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize Published in DiRROS: 08.10.2020; Views: 851; Downloads: 0 |
329. Poročilo o preskusu št.: LVG 2020-188 : opis vzorca: Pinus sylvestris, les, lubje, sekanci : namen testiranja: sum na: Fusarium circinatumNikica Ogris, Barbara Piškur, Špela Jagodic, Zina Devetak, Tašja Cvelbar, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize Published in DiRROS: 08.10.2020; Views: 895; Downloads: 0 |
330. Poročilo o preskusu št.: LVG 2020-187 : opis vzorca: 10134696: Pinus sylvestris, veja (z listi ali brez) ali poganjki, 10134689: Pinus sylvestris, veja (z listi ali brez) ali poganjki : namen testiranja: 10134696: sum na: Fusarium circinatum, 10134689: sum na: Fusarium circinatumNikica Ogris, Barbara Piškur, Špela Jagodic, Zina Devetak, Tašja Cvelbar, 2020, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize Published in DiRROS: 08.10.2020; Views: 801; Downloads: 0 |