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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Forest Society
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Journal DOI :
Korean Forest Society
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Volume & Issues
Volume 102, Issue 4 - Dec 2013
Volume 102, Issue 3 - Sep 2013
Volume 102, Issue 2 - Jun 2013
Volume 102, Issue 1 - Mar 2013
Selecting the target year
Analysis of Characteristics of Plant, Soil Physical and Chemical of Salix spp. on the Environment of Namgang Dam Reservoir
Park, Jae-Hyeon ; Kim, Ki Heung ; Lee, Seok Bae ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 161~169
This study was carried out to examine characteristics of physical and chemical current status and problems of Salix spp. communities based on growth characteristics by tree age and height of the tree species in around Namgang Dam reservoir area. Tree density in 4 survey areas was 5,284 trees/ha, but all areas need to control high tree density. Tree crown area in 4 survey areas was 9,786.4
and crown area of Salix spp. was the most dominant among tree species in watershed of the Jinyang lake. Mean soil depth in 4 survey areas was 65.5 cm higher in the sedimental deposit soil (78 cm) than in forest soil (12.5 cm) near the watershed. Soil bulk density was also higher in the sedimental deposit soil than in forest soil because of poor porosity in the sandy sediment. Soil pH was higher in sedimental deposit soil (A, B horizon:pH 6.7) than in forest soil (A horizon:pH 5.3; B horizon:pH 5.2) because of originated from non-point source polution and detergent of domestic sewage. The results suggest that growth of Salix spp. could be poor because of low fertility with low cation exchange capacity in sedimental deposit soil.
Habitation of the Insect Vector, Monochamus alternatus of Pine Wood Nematode on Height Sound Stumps by Felling Seasons
Jeon, Kwon-Seok ; Park, Nam-Chang ; Lee, Sung-Min ; Choi, Hae-Woong ; Hong, Sung-Cheon ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 170~175
This study was conducted to investigate the effect on the habitation of Monochamus alternatus, a vector insect of Pine wood nematode by the tended sound stumps for the developing forestry control methods of Pine wilt disease controls. Field cage plots (1 m
1 m) were established 12 units (Experiment1:4 units, Experiment2:8 Units) and were treated 4 kinds(February in 2010, February, April, June in 2011). The adults of M. alternatus were put into 4~5couples each the cage June in 2011. Presence or absence of the larva entrance holes and larva were detailed November in 2011. The larva were appeared in the sound stumps of sapling and young trees tended at February, April, June, the current emergence year of M. alternatus, but were not appeared in the sound stumps of sapling and young trees tended February in 2010, one year before the emergence of M. alternatus. The larva habitated in stumps of sapling were likely to be smaller in size in compare to the larva in stumps of young trees. In case of young tree, the larva were found at the cleft part of bark, but were not found at ridge part of bark. All observed larva appeared at part of bark and between the bark and the woody parts, but were not found at the woody parts. To develop the control guiding principal of sound stump after forest tending practice, further experiment need is in existence oviposition and larvae of vectors by height of stemps.
Effects on the Habitats Ecosystem of Benthic Macroinvertebrates by Construction of Torrential Structures
Ma, Ho-Seop ; Kang, Won-Seok ; Won, Du-Hee ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 176~181
The impacts of habitats changes of benthic macroinvertebrae species and individuals of the torrents due to construction of torrent structures can be summarized as follows. Approximately 16 to 40 species and 352 to 4,333.3 individuals of benthic macroinvertebrae were found around the local position of the torrent structures. Construction of torrential structures can increases the stability in the riverbed by preventing vertical corrosion and reducing the flow rate. However, if pond is created due to increase flow rate of rainfall, the temporal confusion of micro-habitats may lead to decrease in the number of species and induce reduced number of diversity as well as cause simplification in the community structure. Therefore, erosion control structures in torrent cause influence on the habitual ecosystem, though there are differences in the degree per distance depending on the types and heights of the structure. Before establishing torrent erosion control structure in mountainous torrent area, ecosystem status should be studied carefully from the planning stage and torrent habitats should be protected by deciding type, height and scale of structure, to minimize the influence on local habitants.
Ripened Persimmon Vinegar with Mountain-cultivated Ginseng Ingestion Reduce Blood Lipids and Enhance Anti-oxidants Capacity in Rats
Jeon, Byung-Duk ; Kim, Pan-Gi ; Ryu, Sungpil ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 182~188
In this study we investigated that the mountain-cultivated ginseng into persimmon vinegar fused material on blood lipids and anti-oxidant capacity in rats. A 4-year-old mountain-cultivated ginseng was ripened with 4-year-matured persimmon vinegar, and then it was diluted 5 times and orally administerd to rats. The rats were divided into a control group (CON), a persimmon vinegar group (PV) and a mountain-cultivated ginseng + persimmon vinegar fusion material group (MPV). The body weight was found to be low in MPV, and amount of the stored fats were also low in PV and MPV. Blood lipids were found to be low in PV and MPV compared to the CON. HDL-C (high density lipoprotein cholesterol) was found to be significantly high in these two groups. Liver Cu,Zn-SOD (superoxide dismutase) and GPx (glutathione peroxidase) were CON < PV < MPV, in sequence, with significance. Especially, it was the highest in MPV. Liver MDA (malondialdehyde) concent was MPV < PV, CON, in sequence, with significance. These results suggested that the fusion material lowers blood lipids and enhance anti-oxidant capacity. We carefully thought that it might be used effectively as a health food.
Indonesia's REDD+ National Strategy between Ideal and Reality
Bae, Jae Soo ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 189~197
The Cancun Agreements under the United Nations Framework Convention on Climate Change require developing countries aiming to undertake REDD+ activities to develop a national strategy or action plan, addressing the drivers of deforestation and forest degradation, a measurement, reporting and verifying (MRV) system including forest monitoring system, and safeguards to ensure equity and co-benefits for local communities and indigenous peoples, and biodiversity. The Government of Indonesia and the Government of Norway established REDD+ cooperation through signing a 'Letter of Intent' in May, 2010. Indonesia agreed on 'a two year suspension on all new concessions for conversion of peat and natural forest'. In turn, Norway agreed to support Indonesia's REDD+ implementation efforts up to one billion United States dollars. Indonesia's REDD+ national strategy (June, 2012) accepted most of the requests included in the 'Letter of Intent'. The REDD+ national strategy, however, does not reflect requests of the Cancun Agreements which noted identification of the drivers of deforestation and forest degradation and guarantee of real greenhouse gas emissions reductions. Indonesia lays emphasis on Norwegian requests which includes expected financial support rather than the Cancun Agreements which have a weak legally-binding requirements.
The Nuclear DNA Content and Histological Characteristics of Triploid Poplars Grown In Vitro
Bae, Eun-Kyung ; Lee, Hyoshin ; Lee, Jae-Soon ; Choi, Young-Im ; Park, So-Young ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 198~203
Herein we analyzed the nuclear DNA content and the histological characteristics of the triploid of the 'Hyunsasi' (Populus alba
) which were developed for biomass production and molecular breeding research. The flow cytometric analysis showed that the nuclear DNA content of the 3 triploids were 1.6 times greater than those of the diploid. In terms of histological characteristics, the cross-section area of the stem of 'Line-18' was 1.6 times larger than that of the diploid. The area of pith, and cortex and phloem of the stem of 'Line-18' was also 1.6 and 2.0 times larger than that of the diploid, respectively. Moreover, the length and area of guard cell of 'Line-18' was 1.2 times larger than that of the diploid. These results helps to understand the cytological characteristics of the triploid poplar clones, and further investigations in the growth rate and wood properties of the triploids growing in the field will determine whether the triploid poplars are good candidates for molecular breeding programs and for the improvement of industrial biomass productivity.
Effects of Temperature and Gibberellin Treatment on Embryo Development and Germination of Sambucus racemosa subsp. pendula Seeds
Kim, Hyun Jin ; Lee, Ki Cheol ; Suh, Gang-Uk ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 204~209
This study was conducted to determine types of seed dormancy in Sambucus racemosa subsp. pendula (Nakai) H.I. Lim & C.S. Chang, an endemic tree species of Korea, whose seeds have been considered difficult to germinate. Seeds of S. racemosa subsp. pendula were stratified at 25/15 or
for 0, 6, or 12 weeks (wks) and incubated at 15/6, 20/10, 25/15, or
(12/12 h) under 14 h photoperiod. To determine the effect of
on seed germination of S. racemosa subsp. pendula, seeds were treated with 0, 500, or 1000 ppm
and then germinated at 25/15 or
. The change in embryo length was investigated at 25/15 or
. Seeds given 12 wks of cold stratification germinated to 33.4% at
and to 25.4% for seeds given 6 wks of warm stratification + 12 wks of cold stratification at
, seeds given 12 wks of warm stratification + 6 wks of cold stratification germinated to 26.0%, and to 28.2% for seeds given 12 wks of warm stratification + 12 wks of cold stratification at
. Warm stratification alone did not germinate seeds throughout the experiment, regardless of the thermoperiod. Linear embryos began to grow after 60 days of incubation at 25/15 or
. The embryo length at day 69 increased from 1.4 mm to 1.50 or 1.62 mm at 25/15 or
, respectively. Embryos of S. racemosa subsp. pendula seeds grew better at
. Gibberellin was effective to break seed dormancy of S. racemosa subsp. pendula. Seeds treated with 500 ppm
germinated up to 40.0% at
and to 62.7% for those treated with 100 ppm
. With these results, seeds of S. racemosa subsp. pendula have both nondeep complex and intermediate complex morphophysiological dormancy.
Annual Variations of Litterfall Production in a Broadleaved Deciduous Forest at the Mt. Keumsan LTER Site
Kim, Choonsig ; Lim, Jong Hwan ; Lee, Im Kyun ; Park, Byung Bae ; Chun, Jung Hwa ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 210~215
Litterfall production represents a major contribution of carbon and nutrient cycling in forest ecosystems. This study was carried out to determine the litterfall production in a broadleaved deciduous forest at the Mt. Keumsan Long Term Ecological Research (LTER) site, Southern Korea. Littefall was collected monthly or bimonthly from the site for 7 years from 2004 to2010. Leaf and reproductive (catkins) litters showed a seasonal variation, but litters of needle, branch, and barks were not changed across the seasons. Annual leaf litter of Quercus serrata and Carpinus laxiflora were significantly different (p<0.05) but that of C. cordata, Chamaecyparis obtusa, and Pinus thunbergii was not significantly changed for 7 years (p>0.05). Annual average litterfall production was 5,223 kg/ha, but annual variations were very large with minimum of 4,110 kg/ha/yr in 2004 and maximum of 6,002 kg/ha/yr in 2007. Total litterfall comprised of 2,323 kg/ha/yr in Q. serrata, 442 kg/ha/yr in C. laxiflora, 157 kg/ha/yr in C. cordata, 131 kg/ha/yr in Acer pseudosieboldianum, 390 kg/ha/yr in other deciduous tree species, 74 kg/ha/yr in P. thunbergii, 37 kg/ha/yr in C. obtusa, 672 kg/ha/yr in branches, 515 kg/ha/yr in miscellaneous, 448 kg/ha/yr in reproductive parts, and 54 kg/ha/yr in barks. respectively. The results indicate that litterfall production of the Mt. Keumsan LTER site was yearly fructurated with the positive linear relationship between leaf or total litterfall and annual mean temperature if no disturbance such as a typoon, and was lower than that of other Korean LTER sites.
Eligibility Analysis of Land on a Reforestation CDM Project in Goseong District, South Korea
Guishan, Cui ; Kwon, Tae-Hyub ; Lee, Woo-Kyun ; Kwak, Hanbin ; Nam, Kijun ; Song, Yongho ; Hangnan, Yu ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 216~222
For reducing greenhouse gases, many countries carried out a series of activities not only at home but abroad. Particularly, after the release of the Kyoto Protocol, either nation or companies' participation was intensified, due to endow to responsibility of emission limits. This study focused on reforestation CDM work in Goseong Gun based on clean development system. Obstacle factors of land eligibility could be distinguished to three periods: before December 31th 1989, present and future. The obstacle before December 31th 1989 was that land cover of study area hardly illustrated by Landsat image, due to the low resolution, which were confirmed by a document of Grassland Composition Permission instead. The problem of current land eligibility is that the area of trees presence are difficult to be determined as forest or not. The boundary of forest in strata was identified, using 3-Dimensional Cartography Machine and aerial photograph. Land eligibility would still have obstacle whether the study area with trees presence has potentiality to be forest in the future at situation in absence of reforestation project. This was resolved by prediction of tree growth using stem analysis during execution of the project at study area.
Genetic Diversity of Mulberry Dwarf Phytoplasma(MD) by SSCP Technique
Han, Sangsub ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 223~228
Phytoplasmas were detected consistently in 42 mulberry cultivars showing dwarf disease using DNA analysis by amplification with phytoplasma universal primer pairs P1/P7 (about 1.8 kb and R16F2n/R2 (about 1.2 kb). The point mutation from 42 cultivars of mulberry tree was detected by single-strand conformation polymorphism (SSCP) analysis. The SSCP profiles were clearly observed from all of cultivars in 8% polyacrylamide gel, electrophoresizing for and running 8-15 hrs. at 150V,
. The MD and JWB phytoplasma PCR products was mixed and electrophoresis was performed to detect their polymorphism. In this results, the SSCP profiles of all bands of MD and JWB were analyzed on single lane and were distinct in their each of band patterns. The SSCP analysis was possible to detect of 1.8 kb and 1.2 kb nucleotide size and near close band patterns were distinct by mix of two samples. Previously, it was only possible to detect of point mutation under 600 bp nucleotide sequence by SSCP analysis but this modification of SSCP technique was possible to detect clearly SSCP band patterns of about 1.8 kb and 1.2 kb nucleotides.
An Analysis of the Operational Cost in the Whole-tree and Cut-to-Length Logging Operation System
Kim, Min-Kyu ; Park, Sang-Jun ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 229~238
This study was conducted to analyze on the operational cost of logging operations in the whole-tree logging operation system by tower-yarder and swing-yarder, and in the cut-to-length logging operation system by excavator with grapple in order to spread efficient logging operation technique and to establish the logging operation system. In the results of the analysis of operation cost, in case of the whole-tree logging operation system, the operation cost was 2,099 won/
in felling by chain saw, 28,286 won/
in yarding by tower-yarder, 18,265 won/
in yarding by swing-yarder, 18,939 won/
in bucking by excavator with grapple and chain saw, 20,484 won/
in forwarding and accumulation by wheel type mini-forwarder, 12,701 won/
in forwarding and accumulation by excavator with grapple and small forwarding vehicle. In case of the cut-to-length logging operation system, the operation cost was 10,160 won/
in felling and bucking by chain saw, 7,567 won/
in cut-to-length extraction by excavator with grapple, 6,982 won/
in branches and leaves extraction by excavator with grapple, 3,040 won/
in the operation road construction by excavator with grapple, 20,484 won/
in forwarding and accumulation by wheel type mini-forwarder, 12,701 won/
in forwarding and accumulation by excavator with grapple and small forwarding vehicle.
Initial Responses of Understory Vegetation to 15% Aggregated Retention Harvest in Mature Oak (Quercus mongolica) Forest in Gyungsangbukdo
Ming, Zhang ; Kim, Jun-Soo ; Cho, Yong-Chan ; Bae, Sang-Won ; Yun, Chung-Weon ; Byun, Bong-Kyu ; Bae, Kwan-Ho ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 239~246
This study observed changes of understory vegetation to evaluate the role of forest aggregate after 15% aggregated retention harvest in mature oak forest (> 100 years) in Gyungsangbukdo Bonghwagun in 2010 and 2011. Spontaneous responses of understory vegetation cover (%), species richness, abundance of plant growth forms (herbaceous and woody plants), and overall attributes (by Ordination analysis) were estimated in aggregate area (0.15 and n=36) and clear cut area (0.85 and n=192) in experimental site and control site (1 and n=300). Based on ordination analysis, overall change of species composition in aggregated sites were relatively lower than in harvest area. Right after treatment, total cover of cutted area slightly decreased from 15.6% to 14.7%, and species richness increased from 14 species to 22 species. Cover and richness in the both of aggregate and control sites increased. In plant growth forms, 15% aggregate harvest revealed positive effects on the abundance (cover and richness) of herbaceous plants than woody group. After retention treatment, overall, edge effect likely played major component of vegetation changes in aggregate forest and in harvested area, mechanical damage from harvest operation and change of forest structure by clear cutting were critical. As pre-treatment data, which are rare in ecological studies in Korea, were critical for interpretation between patterns that may have arisen from spatial distributions in the original forest, our experimental design have higher opportunity for long term monitoring on the effect of forest aggregate and vegetation regeneration in clear cutted area.
Assessment of Canopy Fuel Characteristics for Five Major Coniferous Species in Korea
Kim, Sungyong ; Jang, Mina ; Lee, Byungdoo ; Lee, Youngjin ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 247~254
The objective of this study was to assess the canopy fuel characteristics of five major coniferous species in Korea. This study was also developed allometric equations for the canopy fuel load and canopy base height of the major coniferous species using the allomeric equations of biomass developed by the Korea Forest Research Institute and the data from the
National Forest Inventory. Among the major coniferous fuel types, Pinus koraiensis stands had the highest mean canopy bulk density, 0.34 kg/
, followed by Gangwon region Pinus densiflora stands 0.28 kg/
, Pinus thunbergii stands 0.24 kg/
, Pinus rigida stands 0.15 kg/
, Central region Pinus densiflora stands 0.12 kg/
and Larix leptolepis stands 0.09 kg/
. The adjusted multiple coefficient of determination of the developed models ranged from 0.6321 to 0.9950 for canopy fuel load and 0.6390 to 0.8539 for canopy base height.
Degradation Assessment of Forest Trails in Mt. Jiri Area of Gyeongnam Province
Lim, Hong-Geun ; Park, Jae-Hyeon ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 255~263
This study was carried out to evaluate degradation status of forest trails by analysis of soil physical and chemical properties in Mt. Jiri area of Gyeongnam province. Soil texture was loam in the forest area and sandy loam in the forest trails. Soil bulk density was significantly higher (P<0.05) in the forest trails (1.15 g/
) than in the forest area (1.00 g/
). The rates of pore space were lower in the forest trails (56.6%) than in the forest area (62.4%). Soil moisture content was significantly different (P>0.05) between the forest trails (13.3%) and the forest area (11.3%) Soil strength was higher at 5 cm of soil depth than at 10 cm of soil depth. It indicates that soil compaction by visitors could be affected at 5 cm of soil depth. Soil strength over 30 cm of soil depth was not significantly different between the forest trails and the forest areas. The content of organic matter, total nitrogen, available phosphorus, and exchangeable cations were lower in the forest trails compared with the optimum content of forest soils because of soil erosion with increasing visitors. These results indicate that it needs a counterplan to protect forest trails from overcrowded visitors.
Mating System in Natural Population of Pinus koraiensis at Mt. Seorak Based on Allozyme and cpSSR Markers
Hong, Yong-Pyo ; Ahn, Ji-Young ; Kim, Young-Mi ; Hong, Kyung Nak ; Yang, Byeong-Hoon ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 264~271
Mating system parameters were estimated in a natural population of Pinus koraiensis which was located at Gwongeumseong in Mt. Seorak, South Korea. The estimated parameters from allozyme were as follows: 0.882 of multilocus outcrossing rates(
), 0.881 of singlelocus outcrossing rates(
), 0.368 of correlated paternity(
), and 2.7 of number of effective pollen contributors. The estimated parameters from cpSSR markers were as follows: 0.831 of average of outcrossing rates and 12.4 of the average number of effective pollen contributors. The average outcrossing rate from two genetic markers was 0.857, which was similar to those estimated in other conifer species. More number of potential pollen contributors was estimated from cpSSR marker analysis compared with that estimated from allozyme marker analysis. This result sugges
that cpSSR markers may be more useful than allozyme markers for identifying potential pollen contributors in the analysis of mating system.
A Study on the Development of Standard Diagnostic Table for Oak Mushroom Management and its Applicability
Jeon, Jun-Heon ; Won, Hyun-Kyu ; Yoo, Byoung-Il ; Lee, Seong-Youn ; Lee, Jung-Min ; Ji, Dong-Hyun ; Kim, Yeon-Tae ; Kang, Kil-Nam ; Oh, Duk-Sil ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 272~280
This study aims to develop a standard diagnostic table for management and administration that oak mushroom cultivators of forestry households can utilize. By diagnosing their current level of management with the table, the cultivators themselves will be able to grasp and address their operational challenges better. The table is composed of; questions on the status of forestry households; columns for a series of management performance indices, and; questionnaire with 4 categories and 20 subcategories to check the current level of management and administration by the households. In order to prepare the standard diagnostic table for oak mushroom management, 196 forestry households throughout 10 areas - Cheong-yang, Gong-ju, Bu-yeo and Seocheon in Chungcheongnam-do, Mun-kyung and Ye-cheon in Gyeongsangbuk-do, Jin-an in Jeollabuk-do, Jangheung and Jang-seong in Jeollanam-do, and Jeju Islands - were interviewed with and a total of 190 questionnaires were acquired and made use of in the result analysis. Then, the score on management level of each forestry household was determined in the way of aggregating scores from each subcategory. The overall average score of every household was calculated at 62.2 point with more than half of the respondents, 54.7%, belonging to the range of 60 to 80. When considered by regional groups, the average score of Jin-an was the lowest with 57.6 point while that of Jang-seong was the highest with 69.6 point. In case of the 'cultivation management' category, there were a lot of cultivators who expressed a negative awareness of the term 'pest control' because they had a tendency to think the term in connection with 'herbicides or pesticides'. So it is inevitable to adapt and modify existing groups and grades to make sure that the cultivators can make a right choice without confusing the concept 'pest control' with 'herbicides or pesticides'. Meanwhile, the average scores of 'management and administration' categories were mostly low. It was remarkable in these categories that forestry households in Jeolla province, which had remained in lower ranks in the other three categories, recorded higher scores than those in Chungcheong province, boasting a relatively high level of management and administration.
Analyses of Trade Trends and Competitiveness of Korea and Vietnam in Forest Products
Lee, Sang-Min ; Chang, Cheol-Su ; Song, Seong-Hwan ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 281~291
This study is design to provide basic directions that Korea can take in forestry negotiation of Korea- Vietnam FTA. Trade trends and characteristics of forestry sector are figured out and the competitiveness of main products are analyzed. The trade amount between Korea and Vietnam is $207,260 thousand. Korea exports nontimber products to Vietnam, while she mainly imports wood products. The average import value of wood products during recent five years accounts for 88% of all value from Vietnam. The export items are not various, and the export value is small. The amount of imports, however, which are mainly composed of low price wood products, is relatively big. The results of analysis say that three items of Korean forest products have competitiveness, while Vietnam has eleven items. According to the study it is recommended that a sawn wood and a plywood should be classified as sensitive products to minimize and to take a long term tariff reduction.
A Study on Regional Specialization of Fruit Trees To Strengthen Competitiveness
Kim, Se-Bin ; Ko, Young-Woong ; Oh, Do-Kyo ; Noh, Hee-Kyoung ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 292~299
The purpose of this study is to identify the regional specialization of Fruit trees in Korea and to provide direction for the activation. As a result of the analysis, In the case of chestnut, Gongjun is adjacent to Cheongyang and Buyeo. These region are classified as deeply specialized regions. Walnut trees are grown in large amounts in Gimcheon-si, Yeongdong-gun and Muju-gun, which are all regions classified as deeply specialized regions. Jujube trees are grown mostly Gyeongsan-si, Gunwi-gun, Cheongdo-gun and Yeongcheonsi are geographically close to each other. The production quantity of these areas also showed steady growth. These region are classified as deeply specialized regions. Astringent persimmons are Sangju-si and Yeoungdonggun are close to each other. Other regions are scattered over the country.
Invention of the Portable Bark Remover for Control of Pine Wilt Disease by Disruption of Oviposition of Insect Vector (Monochamus alternatus)
Kim, Joon Bum ; Park, Young Kyu ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 300~304
Pine wilt disease caused by pine wood nematode, Bursaphelenchus xylophilus (Steiner et Buhrer) Nickle, has become the most serious threat to pine trees in Korea since 1988. Pine wood nematode is transferred to healthy trees by Monochamus alternatus (Coleoptera: Cerambycidae) during its maturation feeding and female oviposition. A typical control method against insect vectors in Korea is fumigation of the dead trees by using metam-sodium SL (25%). However, this method is not environment friendly because of the forest contamination by chemical application and destroying landscape by plastic cover. Portable Bark Remover (PBR) was invented to reduce these environmental problems. The vectors oviposit under the bark of the newly dead trees only. Debarking infested trees prevents the vectors from laying eggs and eventually, they can not complete their life cycle. The PBR is a modified debarking device that is attached on the top of the electrical chain saw, which allows ease and rapid debarking of the infested trees. The new method by PBR is expected to be more economic and effective than other conventional methods such as "crushing", "burning" and "fumigation".
Morphological Characteristic of Immature stage in Platypus koryoensis (Murayama) (Coleoptera, Platypodidae) and Local Variation in the Number of Mycangia
Won, Dae-Sung ; Choi, Won Il ; Kwon, Young-Dae ; Kim, Kyung Hee ; Kim, Jong Kuk ;
Journal of Korean Forest Society, volume 102, issue 2, 2013, Pages 305~308
This study was conducted to describe the external morphology of Platypus-koryoensis Murayama in immature stage, to determine each instar based on larvae head-capsule, and to measure individual and local variations in the number of mycangia of adult. Egg of P. koryoensis, had oval shape and lengths of the major and minor axis were
mm, respectively. Body colour of
instar was gloss white with well-developed mandible. Larvae of P. koryoensis grew up to
instar and each instar was clearly classified by head capsule width. Head capsule width for
instar larvae were
mm, respectively. The colour of pupa was pale yellow and its length was
mm. The number of mycangia per female had individual variations from 5 to 12 and 83% of the adults had from 6 to 8 mycangia. There was no significant difference in number of mycangia collected from between Namyangju region and Honchen region.