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Search Results: 1 - 10 of 88755 matches for " Karad?i? Dragan "
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Chrysomyxa pirolata G. Wint in Rabenh: New parasitic fungus on the cones and seeds of spruce
KaradiDragan
Glasnik ?umarskog Fakulteta , 2007, DOI: 10.2298/gsf0796045k
Abstract: The new spruce disease known as "spruce cone rust" was discovered for the first time in Serbia and Montenegro. The fungus was detected in spruce forests only in the mountains regions (Kopaonik, Zlatar, Durmitor). This rust periodically damages the cones in localised forest areas and can be a serious problem. Usually seeds are not formed in diseased cones, and even when they are produced, malformation and resinosis of the cones hinder seed dispersal or extraction. Those seeds that are formed tend to weigh less and have poor germination. As this disease is a serious problem, care must be taken to prevent the spread of the disease to the new uninfected regions.
The distribution, hosts, epidemiology, impact and control of fungus Mycosphaerella pini E. Rostrup apud Munk in Serbia
KaradiDragan
Glasnik ?umarskog Fakulteta , 2004, DOI: 10.2298/gsf0490007k
Abstract: M. pini is one the most widespread and dangerous pathogenic fungi in the plantations of Pinus species in the world. This fungus has been observed on more than fifty Pinus species, and on European Larch, Douglas Fir, Norway Spruce, Serbian Spruce and Sitka Spruce. In Serbia, M. pini caused greatest damage in plantations of Austrian pine (P. nigra Arn). In Serbia both states of the fungus have been observed, i.e. conidiomata and ascostromata. Conidia are far more significant in the infection process. The critical period for infections is May - June. Of the all tested fungicides, the best results have been obtained by copper protectants. In heavily infected plantations of Austrian pine the protections should be carried out in the period when the plantations are 5-20(25) years old.
Contribution to the study of fungi in the genera Sparassis Fr. and Hericium Pers. in our forests
KaradiDragan
Glasnik ?umarskog Fakulteta , 2006, DOI: 10.2298/gsf0693083k
Abstract: Fungi in the genera Sparassis and Hericium cause wood decay. In the forests of Serbia and Montenegro 4 species are identified in the genus Sparassis, and 3 species in the genus Hericium. These fungi develop on physiologically weakened trees, recently killed trees and branch litter (windthrows, broken trees, logs, thick branches). Especially great damage in the stands of Pinus species can be caused by the fungus Sparassis crispa. This fungus colonizes the living trees through the root and causes the brown cubical rot of wood. The rot then spreads from the root to the heartwood and gradually occupies the lower, economically the most valuable part of the tree. In the young phase, the fruiting bodies of all the identified species are edible. Sparassis crispa and Hericium erinaceus excel by their nutritive value and today (in some countries) they are even artificially cultivated.
Tiarosporella species: Distribution and significance
KaradiDragan
Glasnik ?umarskog Fakulteta , 2003, DOI: 10.2298/gsf0387009k
Abstract: The genus Tiarosporella consists of eight species of which four occur on conifers. These fungi differ in conidial size and in the form of appendages that occur on the distal end of the conidia (pycnospore). In Europe only the two species have been recorded. T. parca occurs on the species of the genus Picea (P. abies and P. omorika), while T. durmitorensis infests fir (Abies alba). T. parca can be considered, as an endophyte, and it sporulates only when the needles die due to a stress or old age. T. durmitorensis is a very aggressive pathogen colonizing fir needles of all ages. Together with other fungi, it leads to tree death. So far, T. durmitotensis has been found only in European silver fir stands in the National Park "Durmitor" and in the National Park "Biogradska Gora".
Aleppo pine defense against Sphaeropsis sapinea, Cronartium flaccidum and other fungal pathogens in the Mediterranean part of Montenegro
KaradiDragan,Vujanovi? Vladimir
Glasnik ?umarskog Fakulteta , 2009, DOI: 10.2298/gsf0999059k
Abstract: Aleppo pine (Pinus halepensis Mill.) is the most widely disturbed conifer tree in native forest and plantations throughout the Adriatic coast of Montenegro. However, pathogenic fungi in the region are extremely diversified and constitute the principal threat to healthy tree growth: 15 pathogenic fungal species have beden identified in the Eumediterranean zone - a typical habitat of Aleppo pine, whereas 21 fungal pathogens occurred in northern Submediterranean zone - an atypical habitat for Aleppo pine in Montenegro. Greatest damages are inflicted by Sphaeropsis sapinea, a pathogenic generalist on pine, and Cronartium flaccidum, causal agent of rust disease on pine. The following relates, for the first time, the presence of hypersensitive response (HR) in young needles and shoots (organs rich in nitrogen) as a specific defense mechanism in Aleppo pine against Sphaeropsis sapinea, an otherwise very harmful pathogen for Austrian pine (Pinus nigra Arn.) and other pines in the Mediterranean part of Montenegro. Thus, better understanding of the ecology of S. sapinea, of C. flaccidum, as well as of associated mycobiota and mechanisms of host defense are essential for establishing measures and tools for protection of Aleppo pine ecosystems.
The most significant parasitic and saprophytic fungi on willows in the area of Central Danube Basin
Markovi? Miroslav,KaradiDragan
Glasnik ?umarskog Fakulteta , 2006, DOI: 10.2298/gsf0694181m
Abstract: Parasitic and saprophytic fungi on willows were researched in the area of Central Danube Basin. Altogether 64 species were identified, of which Marssonina salicicola and Colletotrichum gloeosporioides have the greatest significance on more juvenile trees, and Phellinus igniarius, Trametes suaveolens and Laetiporus sulphureus on the older trees.
Gremmeniella abietina (Lagerb.) Morelet: Distribution in Serbia and Montenegro, significance and control
KaradiDragan,Milanovi? Slobodan
Glasnik ?umarskog Fakulteta , 2008, DOI: 10.2298/gsf0898107k
Abstract: Fungus G. abietina is one of the most dangerous pathogenic fungi occurring in conifer plantations and Pinus species are especially at risk. Among pines, the most susceptible species is Austrian pine, and particularly endangered plantations are between 8 and 25 years of age. This fungus was found in Serbia and Montenegro on Austrian pine, Scots pine and spruce, but it was only in mountainous regions (Kopaonik, Vlasina, Go , Durmitor). G. abietina forms both stages (anamorph and teleomorph) in its development. The imperfect form is far more significant for the infection process, i.e. the pycnidial stage and generally all infections are caused by conidia (pycnospores). Apothecia will be formed on the bark only two years after tree dying. In the severely infected plantations, all dead trees should be felled and removed, and the remaining trees should be treated with copper fungicides.
Biology of forest tree protection: its tasks and perspectives
Tucovi? Aleksandar,KaradiDragan
Glasnik ?umarskog Fakulteta , 2002, DOI: 10.2298/gsf0285007t
Abstract: The logical conclusion of the short analysis of criteria on natural resource planning and management in situ and ex situ (scale, number, intraspecific variability, ecology of communities, policy, economy, organisation of research, recreation), referring to active biological protection of trees, is as follows: biological resources of trees in situ and ex situ should be large, diverse and geographically and ecologically distributed throughout the country. Their number and scale depend on our potentials. At the beginning of the new century, we have to create an active (functional) strategy of the protection of tree biology, especially endemic and relic species. Accordingly, the biologists interested in tree resource protection should already exercise their influence in solving these issues (organisation of active protection, more or less directed reproduction, of economically significant species, etc). The biological protection of trees has an intensive development in the developed countries of the world, while the developing countries are trying to follow the trend, depending on their material sources, culture and attitude of their state government Biological protection of trees is an open, new, and very wide area of further research in already set aside natural resources in situ and ex situ. This is a new field of research, without a long tradition. Along with the scientific value of this approach of the systematic and systemic solution of more or less directed tree reproduction, we also need an economic stimulation. The scope and the complexity of this field of research requires further scientific work of a greater number of teams, some of which should be supported by forestry profession and the society in general The introduction of the model of tree recombination system enables a completely new approach to quality control of the successive generations of trees. This means that all current and planned measures in the model must be clearly scientifically defined, integrally (ecosystem) understood and, most importantly, efficiently realized. Also, their definition and realisation must be synchronised and continual both in case of short-term and long-term measures, which are interdependent and inter-conditioned .
The most frequent 'rusts' on trees and shrubs in Serbia
KaradiDragan,Milija?evi? Tanja
Glasnik ?umarskog Fakulteta , 2003, DOI: 10.2298/gsf0388077k
Abstract: This paper describes 15 species of fungi in the order Uredinales, causing the diseases known as "rusts". These fungi develop as obligate parasites and cause very dangerous diseases on cultivated plants. Among the "rusts" occurring on the trees, the following rusts are of special economic significance Melampsorella caryophyllacearum (rust on fir), Cronartium flaccidum (rust on two-needle pines) and Melampsora species (rusts on poplars). Fungi Chrysomyxa pirolata, Pucciniastrum epilobii, Gymnosporangium clavariiforme and G. tremelloides have been identified for the first time in Serbia.
The most important parasitic and saprophytic fungi in Austrian pine and Scots pine plantations in Serbia
KaradiDragan,Milija?evi? Tanja
Glasnik ?umarskog Fakulteta , 2008, DOI: 10.2298/gsf0897147k
Abstract: In Austrian pine plantations in Serbia, the greatest damage is caused by the fungi Mycosphaerella pini, Sphaeropsis sapinea, Cenangium ferruginosum, Germmeniella abietina (in the mountain regions) and occasionally Armillaria spp., Lophodermium spp. (seditiosum, conigenum, pinastri) and Cyclaneusma niveum. In Scots pine plantations, the greatest damage is caused by the fungi Heterobasidion annosum (especially in plantations on sandy soils), Armillaria spp, Lophodermium seditiosum, L. pinastri, Cyclaneusma minus and Sphaeropsis sapinea. Damage caused by rust fungi (Coleosporium sennecionis, Melampsora pinitorqua and Cronartium flaccidum) occurs less frequently. In mountainous regions in Scots pine plantations, great damage is caused by Phacidium infestans, Lophodermella sulcigena and Gremmeniella abietina.
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