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Publications 2006
Department of
forest diversity, planning and expertise
Tvauri I., Ichuaidze G., Supatashvili A. - Peculiarities of root system formation of yew (Taxus baccata) spread in the soils of different depths in Batsara reserve (Vasil Gulisashvili Forest Institute, preserved territories of Tusheti). "Moambe of Georgian Academy of Sciences of Agriculture", Tbilisi. Summary Soil conditions of Batsara reserve have been studied and the peculiarities of root system formation of yew in soils of different depths have been analyzed. Tavadze B., Supatashvili A., Tvauri L. - Common yews pests and fungi causing diseases obtained (Taxus baccata L.) in Batsara state reserve. "Moambe of Georgian Academy of Sciences of Agriculture", Tbilisi. Summary Pests and fungi causing diseases by classes, series and families are revealed on yew in 2005-2006 in Batsara reserve, among them 11 species are pests, and 17 species are fungi causing diseases. Labadze H. (Co-authors Chagelishvili R., Dvalishvili O.) - Prevention of erosion processes in mountainous forest eco-systems of Georgia. "News of Agrarian Science", volume 4, N 4 (in Russian) Summary Question of influence of percentage of forest land of water-collectors upon the quantity of hard drainage, depending on background moistening of regions and percentage of forest of water-collector basins is considered on the example of Georgian mountainous-forest ecosystems. It has been proved that mountainous forests of Georgia fulfill soil-protective and other ecological functions. Quantitative manifestation of these functions mainly are stipulated firstly by the specificity of background moistening of regions, where mountainous forest ecosystems are produced, secondly, by the degree of afforestation of water-collector basins, types of forest, taxation and forestry peculiarities of plantations. Concrete quantitative indicators of bottom deposits in small and big water-collectors are given. Tvauri L., Ichuaidze G., Rostiashvili S. - Condition of natural renewal of yew (Taxus baccata) in Batsara reserve (Vasil Gulisashvili Forest Institute, protected territories of Tusheti). Collection of Scientific Works "Problems of Agrarian science", volume 36. Summary Peculiarities concerning condition of natural renewal of yew are given by us. It was determined by investigations that good conditions by diameters are marked in the openings of large size, where nearly all juveniles of various diameters are quantitatively more than in openings of small size. By the same regularity juveniles were marked by the heights. From the results of investigations good renewal is observed in openings of big sizes. Svanidze M. - On calculation of main usage cutting in East Georgian beech forests. Georgian State Agrarian University, "Problems of Agrarian Science", volume 36. Summary The principle of usage of forest resources is considered, priority role of which in constant using is expressed in formation of high productive coppices (future forests) having a special purpose. Ecologicaly approved methods, examples and calculations of selected cuttings of all-aged beech coppices are given. Tsereteli G., Fasurashvili N. - Sugar contents in the seedlings of Chinese Liriodendrone (Liriodendron chinensis (nemsl.) Sarg.) during a year. "Problems of Agrarian Science", Collection of Scientific Works, volume XXXVII, Tbilisi. (in Russian) Summary Contents of sugars in seedlings of Chinese Liriodendrone are studied by the method of chromotography in the conditions of subtropical climate on the base of Batumi Botanical Gardens. Amanatashvili L. - Influence of forest density on the distribution of precipitation. "Problems of Agrarian Science", volume 36, Tbilisi. Summary The influence of 40 years and 18 year black pine cultures, correspondingly planted at different periods of 1.0 and 0,6 cover closing in Mtskheta forestry (on the Djvari monastery territories) upon distribution of precipitation is considered. It was determined that pine cultures planted in 1964 with cover closing 0,6 keep 30,2 % of precipitation, but silver-tree coppice of 0,6 cover closing, planted in 1986 keeps only 21,1 %. Quantity of kept precipitation significantly decreases during intensive and prolonged rains. Due to the observations it has been determined that after precipitation the soil near tree trunk becomes more moisten, than far away. Amanatashvili L., Nakaidze E. - Moist dynamic of brown soil in Eastern Georgia. "Moambe of Georgian Academy of Sciences of Agriculture", N 17, Tbilisi. Summary Moist regime of brown soils in the period of 2003-2004 is discussed in the article. The periods of moist collection and its expense are determined. Moist collection in soil starts in October-November and lasts up to the beginning of April, after which before the end of August period of moist expense is marked. Amanatashvili L. - Dynamic of collecting of droppings in pine coppices and ash contents in it. "Problems of Agrarian Science", volume 34, Tbilisi. Summary Dynamic of dropping, contents of ash elements in dropping and indicators of elements of quantitative accumulation in pine forests of various ages and densities in East Georgia are discussed in article. Tsereteli G., Amanatashvili L. - Influence of pine cultures on morphological structure of soil and on some physical-chemical properties. "Problems of Agrarian Science", Tbilisi. Gotsiridze R. - Oak ligneous energy and impulse. Publishing house "Gulani", Tbilisi (monograph). Summary In the result of data of complicated analysis on the process of cut oak-tree growth, annual and current annual kinetic, potential and hidden energies of ligneous growth as well as ligneous quantitative movements of impulses have been determined by height, thickness, volume and mass. Berozashvili T. - Active pests of trunk of east spruce (Picea Orientalis Link), general issues of dynamic of quantity of their bio-ecology. Publishing house "Zekari", Tbilisi. Summary During the last century Georgian spruce coppices had been damaged by very aggressive and economically important bark-eaters. They are: 1. Ips. seadentatus Boern, 2. Ips Typographus, 3. Typographus; the questions concerning bio-ecology and quantity abovementioned pests have been already studied. Berozashvili T. - Tactical peculiarities of usage of traditional and new methods of fighting against Ips. typographys L in Georgian spruce stands. Publishing house "Zekari", Tbilisi. Summary Eastern spruce (Picea Orientalis) weakened by various causes is strongly damaged by Ips typographys L in Georgia. In many countries of the world atractants are successfully used for saving spruce stands. Georgia is not exception in this case. In the result of working out of large amount of experimental materials necessary quantity of insect-catchers per hectare was determined. In order to resolve abovementioned problem bio-ecological parameters of spruce coppices and pests have been studied. Amanatashvili L. - Primary (initial) sub-formation of oak-oriental hornbeam forests in eastern Georgia. "Problems of Agrarian Science", volume 35. Summary Peculiarities of oak-oriental hornbeam sub-formation originated from formation of oak forest in the conditions of East Georgia are considered in the article. Distribution of oak-tree, hornbeam and other species by layers is given; indicators of natural renewal of oak-oriental hornbeam forests are analyzed. Djaparidze T. - Present day state of pines planted in the neighborhood of Tbilisi and measures for their improvement. "Problems of Agrarian Science", volume 34. Summary Artificially planted pine coppices in Tbilisi and its neighborhood, in various climate and edaphic conditions in Bagebi, Tskhneti, Lisi, Shindisi, Mtskheta, Okrokhana and Tbilisi (parks and gardens, Lisi and Ku lake neighborhoods) have been studied. Djaparidze T. - Trends of development of Georgian forest economy. Collections of Works of Tbilisi Botanical Gardens, volume 34. Summary Reorganization of forest sector without integration into plan of common economic development of country and into monetary and credit policy is unimaginable. As for stage-by-stage privatization of forest territories, it will bring sufficient income to the state, which will be spent on financing forest protection and rehabilitation measures as well as on improvement of social conditions of Georgian people. However, execution of such measures is inadmissible without working out of legislative base and common state forest policy. Lobjanidze E. - Rare and disappearing species of Caucasian Dendroflora - Georgian maple (Acer ibericum M.B.). T.S.U. Kakheti Branch Scientific Works Collection, volume 7, Tbilisi. Summary Rescuing-preserving measures of this rare and disappearing species. Author has found and studied the only well-preserved small coppice of this very rare and nearly vanished species of Caucasian dendoflora, Georgian maple near Tskhneti, on the right bank of the river Vere, in the neighborhood of Betania monastery, where its bio-ecological peculiarities, renewal, growth-development, fruitfulness, reasons of loss of seedling-juveniles and others are studied on three model areas differed by orographic conditions. Measures for rescuing-preserving of gene pool of this rare and disappearing species are planned. Lobjanidze E. - Bio-ecological properties of bast (Pterocaria pterocarpa Kunt.) and sustainability of their coppices in Kakheti small woods. T.S.U. Kacheti Branch Scientific Works Collections, volume 7. Summary In Lagodekhi state reserve and its neighbouring grove-forests state of individual bast trees and bio groups both in optimal and extremal conditions have been studied. Causes of mass drying up of bast trees have been studied on three objects. Drying up was marked at those plots, where the level of subsoil waters decreases by 0,5-1,0 m or other way round, there where small woods were flooded. In optimal conditions, where water level is stable (0,7-1,0 m) bast is of highest productivity and forms pure, of high bonitation all-aged coppices with general wood stock of 400-500 cubic m. per hectare. It is expedient to announce such coppices as reserve in order to keep gene pool of this disappearing species. Lobjanidze E. - Kolchi willow (buxus colchica Pojark) and carving on willow. Georgian Scientific Fund Journal "Intelect", N 2 (25), Tbilisi. Summary Bio ecological properties of unique disappearing species-Kolchi willow, present day state of its bio groups and reasons of its catastrophic decrease, mainly because of its valuable wood like ivory, which is irreproachable for carving, which is confirmed by sculptures of famous carving master Pochkhua A., are described in the article. Department of
forest rehabilitation and melioration
Dolidze L. - Influence of felling of main usage on forest renewal in beech plantations of eastern Georgia. j. "Agrarian Science", N 1, M. (in Russian) Summary Influence of mechanized processes on renewal of forest is considered in this article. Results of complex investigation of wood logging processes in different climate conditions are given. Dolidze L. - Variation of taxation stock of Beech Forests after felling. - Bulletin of the Georgian National Academy of Sciences, Volume 173, Number 1, January-February, Tbilisi. (in English) Summary Dynamic of taxation indices in felled beech forests is considered in the work. It is determined that dynamics of main taxation indices in coppices with various systems of felling is dissimilar. In some forest felling areas the principle of even and constant using is violated. Dolidze L. - Natural regeneration of Forest in beech stand after cutting. - Bulletin of the Georgian National Academy of Sciences, Volume 173, Number 2, March-April, Tbilisi. (in English) Summary The processes of natural renewal in beech forests after cutting in Kakheti region is considered in accordance with forest types. It is determined that natural renewal of forest takes place best of all in beech forests of bird eyed and bunting types, and worst of all in blackberry types. Chagelishvili R. (co-authors Dvalishvili O., Labadze N.) - Prevention of erosion processes in mountainous forest eco-systems of Georgia. "News of Agrarian Science", volume 4, N 4. (in Russian) Summary Question of influence of percentage of forest land of water-collectors upon the quantity of hard drainage, depending on background moistening of regions and percentage of forest of water-collector basins is considered on the example of Georgian mountainous-forest ecosystems. It has been proved that mountainous forests of Georgia fulfill soil-protective and other ecological functions. Quantitative manifestation of these functions mainly are stipulated firstly by the specificity of background moistening of regions, where mountainous forest ecosystems are produced, secondly, by the degree of afforestation of water-collector basins, types of forest, taxation and forestry peculiarities of plantations. Concrete quantitative indicators of bottom deposits in small and big water-collectors are given. Dvalishvili O. (co-author Chagelishvili R.) - Regulation of carbon dioxide in mountainous forests of Georgia. "Problems of Agrarian Science", Collection of scientific works, volume XXXVII, Tbilisi. Summary The importance of mountainous forests is considered, concerning absorption of carbon dioxide and production of free molecular oxygen by individual forest cenosis. In the process of photosynthesis quantitative indices of absorbed CO2 by individual phytocenosis of mountainous forest are defined. Pasurashvili N. (co-author Tsereteli G.) - Influence of pine cultures on morphological structure of soil and some physical-chemical contents. "Problems of Agrarian Science", Collection of Scientific Works, volume XXXVI, Tbilisi. Summary It has been determined that black pine cultures planted in the neighborhood of Tbilisi positively acts upon both morphological and its physical-chemical contents of soil in comparison with areas not covered with forest. Namely agregative and mechanical contents improve, acidity increases, due to it soil productivity rises. Pasurashvili N. (co-author Tsereteli G.) - Sugar contents in seedlings of Chinese liriodendrone (Liriodendrone chinensis (hemsl.) sarg) during a year. "News of Agrarian Science", volume 37. (in Russian) Summary Sugar contents in seedlings of Chinese Liriodendrone are studied in this article by means of chromotography method in the conditions of subtropical climate on the grounds of Batumi Botanical Gardens. Department of
forest protection
Pilarska D., Solter L., Kereselidze M.,Linde A., Gernot H.2006. Microsporidian infections in Lymantria dispar larvae: Interactions and effects of multiple species infections on pathogen horizontal transmission. Journal of Invertebrate Pathology, Volume 93, Issue 2, October 2006, Pages 105-113. Summary The interactions in multiple
species infections and effects on the horizontal transmission of three microsporidian
species, Vairimorpha disparis, Nosema lymantriae and Endoreticulatus
schubergi, infecting Lymantria dispar were evaluated in the
laboratory. Simultaneous and sequential inoculations of host larvae were
performed and the resulting infections were evaluated. Test larvae were
exposed to the inoculated larvae to measure horizontal transmission. Dual
species infections demonstrated interspecific competition between Nosema
and Vairimorpha in the host larvae, but no observable competition
occurred between Endoreticulatus and either of the other
microsporidian species. Timing of inoculation was an important factor
determining the outcome of competition between Nosema and Vairimorpha.
The species inoculated first showed a higher rate of successful establishment;
a time lag of 7 days between inoculations allowed the first species to
essentially exclude the second. The microsporidia differed in efficiency of
horizontal transmission. Nosema and Endoreticulatus were
transmitted at very high rates, close to 100%. Horizontal transmission of Vairimorpha
was less efficient, ranging from 25% to a maximum of 75%. The patterns of
infection observed in inoculated larvae were reflected in the test larvae
that acquired infections in the horizontal transmission experiments.
Competition with Vairimorpha suppressed horizontal transmission of Nosema
after simultaneous and sequential inoculation. In simultaneous inoculation
experiments Endoreticulatus had no effect on transmission of Nosema
and Vairimorpha. Tavadze B., Supatashvili A., Tvauri L. - Common yews pests and fungi causing diseases obtained (Taxus baccata L.) in Batsara state reserve. "Moambe of Georgian Academy of Sciences of Agriculture", Volume 17. Summary Results of forest-pathological investigations, carried out in yew plantations in 2005-2006 are given in the article. 17 species of 7 families from two series of fungi and 11 species of 6 families from 4 series of pests are revealed after investigations on common yew. One species Xestobium rufovillosum Deg. has been marked for the first time in Georgian Fauna. Tavadze B. - Main diseases of common chestnut (Castanea astiva Mill.). J. "Protection of Plants", N 6, pp-39-40. Summary Main diseases of common chestnut in Georgia caused by following pathogens - Cryphonectria parasitica (Marril) Barr., Cilindrosporium Castanicola (Desm.) Berl., Phytophtora cambivora Petri, Armillaria mellea Quel. are discussed in the article. Tavadze B. - Caucasian Pine of curved trunk form (Abies nordmaniana) - new species or ecotype? Journal "Science and Technologies", N-N 1-3. Summary Caucasian Pine of curved trunk form spread in some forestry of Gori, Kaspi, Kareli is described in the article and conclusion is made that we possibly deal with a new species developed by means of mutation. Chkhoidze M. - Prognosis of vital capacity of (Yps typographus L.) populations and ways of fighting against it. "Matsne of Academy of Science, Biological Series B", 2006, volume 4. Summary Blood containing elements of especially dangerous insect (Yps typographus L.) of eastern spruce (Picea orientalis Link.) are studied. According to hemocyte quantative, morphological and structural changes caused by entomopathogenic microorganisms, physiological conditions of populations of Yps typographus L., their fertility are defined and hence prognosis of expectable changes in dynamics of pest quantity has been done. On the grounds of infectious pathologic analysis ecological measures for regulating typographers quantity has been worked out. |
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