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| RIJEČ UREDNIŠTVA |
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| Boris Vrbek | |
| INTERNATIONAL YEAR OF FORESTS IN THE LIGHT OF THE 50th ANNIVERSARY OF CLOSE COLLABORATION BETWEEN THE CROATIAN FORESTRY SCIENCE AND PROFESSION
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5000 |
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| IZVORNI ZNANSTVENI ČLANCI |
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| Medak, Jasnica | UDK 630* 188 (001) |
| Forests of Sweet Chestnut with Odorous Pig-Salad (Aposeri foetidae-Castanetum SativaeAss. nova) in Croatia
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5005 |
| Ivanković,M., M. Popović, I. Katičić, G. von Wuehlisch, S. Bogdan | UDK 630* 165 (001) |
| Quantitative Genetic Variation of European Beech (Fagus sylvatica L.) Provenances from the Southeastern Europe
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5025 |
| Littvay, Tibor | UDK 630* 165 (001) |
| Phenotypic Stability andAdaptability of Families of Common Walnut (Juglans regia L.) in Progeny Tests
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5038 |
| Ivanković,M., M. Popović, S. Bogdan | UDK 630* 232.3 (001) |
| Acorn Morphometric Traits and Seedling Heights Variation of Pedunculate Oak (Quercus robur L.) from the Seed Stands in Croatia
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5046 |
| Marjanović,H., M. Z. Ostrogović, G. Alberti, I. Balenović, E. Paladinić, K. Indir, A. Peressotti, D. Vuletić | UDK 630* 120 + 114.2 (001) |
| Carbon Dynamics in younger Stands of Pedunculate Oak during two Vegetation Periods
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5059 |
| Dubravac,T., S. Dekanić,V. Roth | UDK 630* 425 + 531 (001) |
| Damage Dynamics and Structure of the Pedunculate Oak Tree Crowns in Stands in Microelevations and Microdepressions – Results from the Monitoring on Permanent Experimental Plots
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5074 |
| Seletković,I., N. Potočić,V. Topić, L. Butorac, G. Jelić,A. Jazbec | UDK 630* 232.3 Pinus nigra Arn. (001) |
| Influence of Various Container Types and Slow-release Fertilizer Doses on Growth and Physiological Parameters of Black Pine (Pinus nigra Arn.) Seedlings
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5090 |
| Krpan, A. P.B., Ž. Tomašić, P. Bašić Palković | UDK 630* 537 + 562 (001) |
| Biopotential of Indigobusch (Amorpha fruticosa L.) – Second Year of Investigation
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5103 |
| Pernek,M., N. Lacković | UDK 630* 453 (001) |
| The Role of Bark Beetles in Silver Fir Decline and Possible Use of Pheromone Traps for the Monitoring
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5114 |
| Liović, Boris | UDK 630* 443 (001) |
| The Influence of Powdery Mildew (Microsphaera alphitoides Griff. et Maubl.) on Growth and Survival Rate of Oak Seedlings
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5122 |
Summary: Powdery mildew as plant disease caused by the fungus species Microsphaera alphitoidesGriff et Maubl., has major impact in process of oak trees dieback. Most threatened are seedlings and saplings. Experiences from professionals in last few decades proved that within the habitat of Pedunculate oak, powdery mildew is one of important factors that affects survival rate of oak’s saplings, therefore rejuvenation of oak forests. Although fungus highly pathogenic, the researches of its influence on development and dieback of saplings in order to justify the investments in protection are relatively few. The researches targeted to determine the level of dependence between the height increment and diameter increment in relation with the survival rate of seedlings and the intensity of contamination caused by mildew, are set on research plots according to the block distribution in fenced surfaces, under the Forest District Bjelovar of the Croatian Forests Ltd. The experiment is set on the same model also in the Croatian Forest Research Institute’s nursery. The acorns collected were treated with fungicides and sawn in rows in fenced surface. In experiment two variants were tested in four repetitions; seedlings treated with anti-mildew fungicides and seedlings without any protection. After germination in one-month intervals the plots were cleaned from weed and the height increment was measured, whilst based on the surface of leaves covered with mycelia the infection caused by powdery mildew was estimated on 50 leaves sample in every plot. Fungicides were applied every 15–20 days depending of weather conditions. For the protection three fungicides were used: Artea 330 EC (0.5 l / ha), Anvil 5 SC (0.5 l /ha) and Punch 10EW (0.3 l / ha) all with 250 l/ha of water and 0.2 % Sandovit surfactant. Fungicides were used in forest nurseries seven times and five times in forest. The intensity of photosynthesis was measured on infected and non-infected leaves with portable gas-exchange system Li-Cor LI- 6400. On seedlings treated with fungicides at 10.00 hours was measured 8,31 µmol of CO2m-2s-1while at 14.00 hours was measured 6,76 CO2m-2s-1. On infected seedlings at 10.00 hours was measured significantly lesser value 5,38 µmol of CO2m-2s-1while at 14.00 hours 3,75 CO2m-2s-1. The research results show the direct relationship between the infestation by powdery mildew and the intensity of photosynthesis with the height increment and the survival rate of seedlings. This relationship is particularly denoted inside the forest, under the canopy where average height of seedlings (Graf 4) is significantly lesser at the infected seedlings (22,62 cm) compared with the seedlings treated by fungicides (25,57 cm). At the infected seedlings appeared massive defoliation 12 days earlier than at the uninfected. The survival rate of infected seedlings (Graf 7) in the forest at the end of the 1st year is 78 % while the survival of treated seedlings is 94 %. In opposition inside the nursery (Graf 5) the infected plants have average height of 24,82 cm at the end of first vegetation, while treated are relatively smaller 22,56 cm. The survival rate in the nursery (Graf 6) is approximately equal in both treatments, at the infected seedlings 92 % comparing to 95,5 % at the uninfected.
Key words: oak seedlings; powdery mildew (Microsphaera alphitoides Griff. et Maubl.); fungicides; photosynthesis intensity; survival rate; height increment |
| Pernek,M., M. Županić, D. Diminić,T. Cech | UDK 630* 443 (001) |
| Phytophthora Species on Beech and Poplars in Croatia
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5130 |
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| PRETHODNO PRIOPĆENJE |
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| Pilaš,I., Š.Planinšek | UDK 630* 116 + 114 |
| The Reconstruction of the Water Regime in Lowland Forests in Support of Sustainable Management
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5138 |
| Potočić,N., I. Seletković | UDK 630* 533 + 425 |
| Defoliation of Forest Trees in Croatia in the period 2006 – 2009
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5149 |
| Roth,V., S. Dekanić,T. Dubravac | UDK 630* 232.3 (Quercus robur L.) |
| Effect of Acorn Size on Morphological Development of One-year-old Seedlings of Pedunculate Oak (Quercus robur L.) in Differing Light Conditions
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5159 |
| Gradečki-Poštenjak, M., S. Novak Agbaba, R. Licht, D. Posarić | UDK 630* 232.3 |
| Dynamics ofAcorn Production and Quality of English OakAcorn (Quercus robur L.) in Disrupted Ecological Conditions
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5169 |
| Topić,V., L. Butorac, G. Jelić | UDK 630* 539 (Arbutus unedo L.) |
| Wood and Foliage Mass in Strawberry Tree (Arbutus unedo L.) Maquis on theArea of Vrgorac
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5182 |
| Perić,S., M. Tijardović, A. Jazbec | UDK 630* 232:233 + 120 |
| Results of Research on Douglas Fir Provenances in Ecologicaly Different Continenetal Parts of Croatia
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5190 |
| Novak Agbaba,S., N. Ćelepirović, M. Ćurković Perica | UDK 630* 442 |
| Protection of Sweet Chestnut Stands
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5202 |
| Indir,K., V. Novotny | UDK 630* 55 : 565 |
| Circular Sample Plot Size Impact on Structure Elements Estimation in Selected Pedunculate Oak Stands
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5211 |
| Vuletić, D., S. Krajter, O. Vlainić | UDK 630* 907 + 907.2 |
| Review of Local Residents and UsersAttitudes Towards Nonwood Forest Products and Services with Remarks on Obstacles and Possibilities for Improvement
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5222 |
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| STRUČNI ČLANCI |
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| Vrbek, B., I. Pilaš | UDK 630* 114.4 + 232.4 |
| Researches of Soil Changes in the Pinus and Robinia Forest on Đurđevački SandsArea
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5230 |
| Seletković,I., N. Potočić, M. Šango | UDK 630* 232.3 (Fagus sylvatica,Quercus robur) |
| Useability of Hungavit, a Preparation for FoliarApplication, for Enhancement of Quality of Common Beech (Fagus sylvatica L.) and Pedunculate Oak (Quercus robur L.) Seedlings in Nursery Production
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5239 |
| Paladinić,E., D. Štimac, H. Marjanović, I. Balenović, M. Z. Ostrogović | UDK 630* 49 : 562 (Abies alba Mill.) |
| ProductionAspect of Silver Fir (Abies alba Mill.) Dieback on Example of a few Beech-fir Stands
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5248 |
| Matošević,D., M. Pernek | UDK 630* 453 |
| Alien and Invasive Insects in Croatian Forest Ecosystems and Estimate of their Damage
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5264 |
| Benko,M., I. Balenović | UDK 630* 587 |
| Past, Present and Future of Application of Remote Sensing Methods in Croatian Forest Inventory
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5272 |
| Novotny,V., I. Balenović, N. Medenjak, D. Štorga, D. Pošta | UDK 630* 569 |
| Research on Structure of older and old Common Beech Stands in Management Unit “Đurđevačka Bilogora”
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5282 |
