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915. Pseudodidymella fagi in Slovenia : first report and expansion of host rangeNikica Ogris, Ana Brglez, Barbara Piškur, 2019, original scientific article Abstract: The fungus Pseudodidymella fagi is spreading in Europe and causing leaf blotch of European beech, Fagus sylvatica. Between 2008 and 2017, outbreaks of P. fagi were observed on European beech in Switzerland, Germany (also on F. orientalis), Austria, and Slovakia. In Slovenia, leaf blotch symptoms were first observed on F. sylvatica in 2018. P. fagi was identified as the causal agent of the observed symptoms in Slovenia by morphological examinations together with sequencing of the internal transcribed spacer (ITS) region of the rDNA. This study links the fungus to the expansion of the known distribution of the disease to Slovenia, and based on in vitro pathogenicity trials, also to a new potential host, Quercus petraea. The pathogenicity tests confirmed F. sylvatica and F. orientalis as hosts for P. fagi, but not Castanea sativa, where pathogenicity to F. orientalis was proved for first time in vitro. Although Koch%s postulates could not be proven for C. sativa, it seems to be partially susceptible in vitro because some of the inoculation points developed lesions. Additionally, damage to Carpinus betulus related to P. fagi near heavily infected beech trees was observed in vivo but was not tested in laboratory trials. Based on the results and our observations in the field, it is likely that P. fagi has a wider host range than previously thought and that we might be witnessing host switching. Keywords: Pycnopleiospora fagi, leaf blotch, pathogenicity test, inoculation test, Fagus orientalis, Fagus sylvatica, Quercus petraea, mycopappus-like propagule, Carpinus betulus, host switching Published in DiRROS: 23.08.2019; Views: 2695; Downloads: 1705 Full text (4,90 MB) This document has many files! More... |
916. Poročilo o preskusu št.: LVG 2019-079 : opis vzorca: Pinus, veja (z listi ali brez) ali poganjki : namen testiranja: sum na: Fusarium circinatumBarbara Piškur, Špela Jagodic, 2019, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, borov smolasti rak, Fusarium circinatum, Gibberella circinata, Pinus, bor Published in DiRROS: 19.08.2019; Views: 2031; Downloads: 115 This document has many files! More... |
917. Poročilo o preskusu št.: LVG 2019-078 : opis vzorca: LVG2019/00310/BP: Larix decidua, listi, LVG2019/00312/BP: Abies alba, listi, LVG2019/00311/BP: Pinus mugo, listi : namen testiranja: sum na: LVG2019/00310/BP: sum na: Meria laricis, LVG2019/00312/BP: sum na: Valsa abietis, LVG2019/00311/BP: sum na: Botrytis cinereaAna Brglez, Andreja Kavčič, Barbara Piškur, 2019, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, Meria laricis, Cyclaneusma, Leucaspis, rilčkarji, Valsa abietis Published in DiRROS: 19.08.2019; Views: 2545; Downloads: 175 This document has many files! More... |
918. Poročilo o preskusu št.: LVG 2019-074 : opis vzorca: Pinus sylvestris, veja (z listi ali brez) ali poganjki : namen testiranja: sum na: Fusarium circinatumBarbara Piškur, Zina Devetak, Špela Jagodic, 2019, expertise, arbitration decision Keywords: varstvo gozdov, borov smolasti rak, Fusarium circinatum, Gibberella circinata, rdeči bor, Pinus sylvestris, Diplodia pinea, sušica borovih poganjkov Published in DiRROS: 12.08.2019; Views: 2050; Downloads: 114 This document has many files! More... |
919. Poročilo o preskusu št.: LVG 2019-077 : opis vzorca: Pinus sylvestris, les, lubje, sekanci : namen testiranja: sum na: Fusarium circinatumBarbara Piškur, Špela Jagodic, Nikica Ogris, 2019, expertise, arbitration decision Keywords: varstvo gozdov, morfološke analize, borov smolasti rak, Fusarium circinatum, Gibberella circinata, Pinus sylvestris, rdeči bor Published in DiRROS: 12.08.2019; Views: 2023; Downloads: 119 This document has many files! More... |
920. Rdeči osip duglazije (Rhabdocline pseudotsugae)Ana Brglez, Nikica Ogris, Barbara Piškur, 2019, professional article Keywords: varstvo gozdov, karantenski organizmi, duglazija, Pseudotsuga menziesii, gliva, Rhabdocline pseudotsugae, rdeči osip duglazije Published in DiRROS: 08.08.2019; Views: 2617; Downloads: 782 Full text (166,78 KB) |