broj: 9-10/2012
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| RIJEČ UREDNIŠTVA | ||
| Uredništvo | ||
| EMPLOYMENT IN THE FORESTRY SECTOR pdf HR EN | 429 | |
| IZVORNI ZNANSTVENI ČLANCI | ||
| Nikola PERNAR, Emil KLIMO, Darko BAKŠIĆ, Ivan PERKOVIĆ, Michal RYBNÍČEK, Hanuš VAVRČÍK, Vladimír GRYC | UDK 630*114.2 (001) | |
| Carbon and nitrogen accumulation in common Alder forest (Alnus glutinosa Gaertn.) in plain of Drava river pdf HR EN | 431 | |
| Joso VUKELIĆ, Dario BARIČEVIĆ, Irena ŠAPIĆ | UDK 630*188 (001) | |
| Submontane-sub-pannonian beech forests of northern Croatia pdf HR EN | 445 | |
| Lea BARIĆ, Miljenko ŽUPANIĆ, Milan PERNEK, Danko DIMINIĆ | UDK 630*443 (001) | |
| First records of Chalara fraxinea in Croatia – a new agent of ash dieback (Fraxinus spp.) pdf HR EN | 461 | |
| Summary: Chalara fraxinea is a novel disease responsible for common ash (F. excelsior) dieback during last 10 years in many European countries. The disease was also confirmed on narrowleafed ash (F. angustifolia), and on American and Asian ash species. The symptoms of dieback are especially visible in tree crowns, including wilting and premature leaf shedding, necrosis of bark and wood discoloration. Isolation of C. fraxinea from infected bark and wood on artificial media resulted in growth of morphologically specific colonies. The telemorph of C. fraxinea, Hymenoscyphus pseudoalbidus apothecia, are developed on leaf petioles from previous year in the litter. Ascospores of telemorph are winddispersed, and are responsible for the rapid spread of this disease. Presence of C. fraxinea on common ash trees in Croatia was first recorded in Gorski Kotar region in 2009, affecting trees of different ages. In the same year, pathogen was successfully isolated from necrotic bark and wood tissues. In 2010 and 2011, research was expanded on larger territory of Croatia in order to determine distribution of the pathogen. The shoots and branches with developed symptoms were collected from common and narrowleafed ash. In May 2011, four sample plots of common ash were marked in Gorski Kotar region. On each plot, 20 ash trees affected with C. fraxinea were selected for monitoring of health condition changes. The assessment of crown condition (foliage transparency) was made on selected trees on plots, also registering the other biotic (wood decay fungi, insects damage) and abiotic (frost, windthrow, snow damage) factors that could additionally have influence on ash dieback. Leaf rachises with mature H. pseudoalbidus apothecia were sampled from litter for further analyses. The biology of C. fraxinea species is still unknown, so it is necessary to continue and make further research, to provide disease management and control measures. Key words: common ash; narrowleafed ash; dieback; C. fraxinea; necrosis; discoloration; telemorph | ||
| Vlado GOGLIA, Jozef SUCHOMEL, Josip ŽGELA, Igor ĐUKIĆ | UDK 630*302 + 384 (001) | |
| The effectiveness of forest pre-commercial thinning in the context of Directive 2002/44/EC pdf HR EN | 471 | |
| Igor POLJAK, Marilena IDŽOJTIĆ, Marko ZEBEC, Nikola PERKOVIĆ | UDK 630*164 (Castanea sativa Mill.) (001) | |
| The variability of european sweet chestnut (Castanea sativa Mill.) in the region of northwest Croatia according to morphology of fruits pdf HR EN | 479 | |
| Mile RADOČAJ, Mario BOŽIĆ, Mislav VEDRIŠ | UDK 630*569 (001) | |
| Applicability of Vertex telemeter in measuring the structure of montane beech stand using variable probability sampling pdf HR EN | 491 | |
| PRETHODNO PRIOPĆENJE | ||
| Maja JURC, Miloš ČERNÝ, Dušan JURC | UDK 630*453 | |
| First record of alien pest Ophiomyia kwansonis (Diptera: Agromyzidae) in Europe and its phytosanitary significance pdf HR EN | 501 | |