1. Obvladovanje hruševega ožiga (Erwinia amylovora (Burrill) Winslow et al.)Janja Lamovšek, Alenka Ferlež Rus, Jože Miklavc, Tanja Dreo, Primož Pajk, elaborat, predštudija, študija Povzetek: Prvi pojav hruševega ožiga pri nas je uradno zabeležen leta 2001. Prvi večji izbruh bolezni v Sloveniji je bil v letu 2003, ko se je hrušev ožig razširil po celotni Gorenjski in v okolici Maribora. Ob drugem večjem izbruhu, ki se je zgodil leta 2007, se je bolezen razširila tudi proti jugu in vzhodu države. Hrušev ožig se je ustalil na Gorenjskem, Koroškem, na območju Maribora in na Notranjskem. Kasneje sta bili iz varovanega (neokuženega) območja izločeni še občini Lendava ter Renče-Vogrsko (južno od avtoceste H4).
Ključne besede: hrušev ožig
Objavljeno v DiRROS: 03.09.2024; Ogledov: 886; Prenosov: 1084
 Celotno besedilo (3,92 MB)
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2. Phytoplasmas associated with declining of hazelnut (Corylus avellana) in SloveniaNataša Mehle, Nejc Jakoš, Miro Mešl, Jože Miklavc, Boštjan Matko, Mojca Rot, Alenka Ferlež Rus, Robert Brus, Marina Dermastia, 2019, izvirni znanstveni članek Povzetek: Hazelnut (Corylus avellana) is cultivated on 118 ha and ranks eighth in Slovenian fruit growing production, representing 2.8% of the total area of fruit plantations in the country. However, decline of some of the trees appeared in 2012 in two plantations located in eastern Slovenia. Together these orchards cover 5 ha, with around 1600 trees planted 12 to 15 years ago. By October 2018, ~12% of these trees had died, and an additional 12% showed decay symptoms. The dead and dying trees were scattered throughout both orchards, with no apparent pattern. The most affected cultivar was ‘Istrska dolgoplodna leska’. Using molecular diagnostic methods, we showed infection of symptomatic trees with three unrelated phytoplasmas: ‘Candidatus Phytoplasma fragariae’, of the 16SrXII-E phytoplasma subgroup, and phytoplasma of the 16SrV and 16SrIX groups. In 2018, the presence of ‘Ca. P. fragariae’ and/or phytoplasma of 16SrV group were confirmed in decayed hazelnut trees in eastern, north-eastern, central, south-eastern and western Slovenia. ‘Ca. P. fragariae’ has also been detected in a forest in south-western Slovenia, for Acer campestre, Carpinus betulus, Crataegus laevigata, Fraxinus ornus and Quercus petraea. All infected forest trees showed unusual dense proliferation of sprouts from roots and/or trunks. Molecular characterisations of partial 16S rRNA, secY, map and ribosomal protein genetic locus of hazelnut 16SrV phytoplasma isolates show that they are identical to isolates that can cause grapevine flavescence dorée disease. Here, the results of our recent study and the open questions on this burning issue for hazelnut production are presented.
Ključne besede: Corylus avellana, ʼCandidatus Phytoplasma fragariaeʼ, 16SrV phytoplasma group, 16SrIX phytoplasma group, decline
Objavljeno v DiRROS: 24.07.2024; Ogledov: 1020; Prenosov: 631
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