• 한국식물병리학회지
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• 제14권6호
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• pp.676-681
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• 1998

Disease incidence of Codonopsis lanceolata was surveyed at the major cultivating fields in Chonbuk province in 1996 to 1997. The main diseases of Codonopsis lanceolata were ovserved as leaf spot caused by Septoria codonopsis, anthracnose by Glomerella cingulata, brown leaf spot by Cercospora sp., rust by Coleosporium koreanum, powdery mildew by Erysiphe sp., Fusarium wilt caused by Fusarium oxyporum, and white root rot by Sclerotium rolfsii. Anthracnose, leaf spot and brown leaf spot occurred severely on leaves from early July to late August. They were caused early fallen leaves. Fusarium wilt and white root rot occurred severely on stem and below the soil line in late August. They resulted in withering to death or chlorosis and fallen of leaves. Disease incidence of Codonopsis lanceolata was also substantially different in occurrence with a method of cultivation in late growth stage. Fusarium wilt and white root rot were more severe with a method of no support cultivation than those with a method of support cultivation with a stick. Fusarium wilt occurred 48.8% in a method of no support cultivation but 3.1% in a method of support cultivation with a stick. And white root rot occurred 18.9% in a method of no support cultivation but 0.3% in a method of no support cultivation with a stick. Thus, it proved that soil-borne diseases could be controlled support cultivation with a stick.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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• pp.9-12
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• 2003

Clubroot disease of curcifer crops caused by Plasmodiophora brassicae had been first reported in 1920 in Korea, and maintained mild occurrence until 1980s. Since 1990s the disease has become severe in alpine areas of Kyonggi and Kangwon, gradually spread to plain fields throughout the country, and remains as the greatest limiting factor for its production. Researches on the disease has begun in late 1990s in our laboratory after experiencing severe epidemics. Survey of occurrence and etiological and ecological studies have been carried out, particularly, on the pathogen physiology, race identification, quantification of soil pathogen population, host spectrum of the pathogen, and control measures.(중략)

• 자원환경지질
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• 제20권4호
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• pp.223-234
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• 1987

This paper describes the mode of occurrence and mineralogical properties of electrum from the Namseong Gold-Silver deposits, for the purpose of obtaining data on the characteristics of the ore deposits and the behavior of gold and silver during the mineralization. The gangue minerals are quartz, calcite, fluorite. Ore minerals are mainly composed of pyrite, sphalerite, chalcopyrite and galena with minor amount of argentite, electrum, pyrargyrite, native silver and unidenfied mineral(Cu-Fe-Ag-S series). Three stage of mineralization recognized are, from early to later, (I) pyrite-electrum stage (II) sphalerite-chalcopyrite-galena-argentite-electrum stage (III) sulfosalts stage. The filling temperature of fluid inclusions in quartz ranges from $225^{\circ}$ to $335^{\circ}C$. The value of sulfur fugacity estimated by means of electrum-tarnish method ranges from $10^{-11.5}$ to $10^{-14}$ atm. The compositional heterogeneity within a single grain with respect to gold concentration is common in the Namseong electrums Chemical composition of electrum ranges generally between 25~45 atom% Au. Its gold content decreases in late stages of mineralization.

• 한국초지조사료학회지
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• 제9권3호
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• pp.174-178
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• 1989

The investigation was carried out to identify the main pathogen infected with sheath blight in corn plant during 1986-1987. The main fungi of sheath blight isolated from corn plant was identified as Rhizoctonia sobni. Sheath blight in corn plant was first found in early July and infected extremely from late July to end August. Severe sheath blight disease was observed in Gyeongido (Yeoju and Suweon) and Jeonnam (Kwangju) area. The rate of attack was associatied with management and cultural environments of corn plant. Dense planting increased sheath blight, but application of cattle compost reduced the rate of infection. A positive correlation was found between infection rate of shealth blight and concentration of soluble carbohydrate in corn plant (r=0.96). The varieties of Jinjuok, Suweon 83, Suweon 87, Suweon 89, P.3055, P.3160, DK689 and XCG 51 showed remarkable tolerance to sheath blight disease.

• The Plant Pathology Journal
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• 제17권1호
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• pp.40-44
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• 2001

Disease occurrence and development of gray blight of tea (Camellia sinensis) were investigated. Higher incidences and more severe damage by gray blight were found in Japanese tea variety Yabukita than the Korean local variety. In Yabukita, Pestalotiopsis longiseta was more frequently observed on the diseased leaves than P. theae but vice versa in the Korean local variety. This indicates that there was the varietal difference in the distribution of fungal species of gray blight pathogens. Both varieties were most severely damaged during the third harvest period with weather conditions of high temperature and humidity favorable to the disease. Presence of the tea brown blight fungus Glomerella cingulata on the margin of gray blight lesion at the late stahe suggested that the pathogenic fungi of tea gray blight were replaced by the brown blight fungus during the disease development.

• 한국응용곤충학회지
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• 제46권1호
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• pp.165-168
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• 2007

고구마 재배지에 발생하는 풍뎅이류 유충(굼벵이)의 종류 및 종별 피해양상을 조사하였다. 고구마 재배지 토양에 발생하는 풍뎅이류는 큰검정풍뎅이(Holotrichia parallela), 참검정풍뎅이(Holotrichia diomphalia), 애풍뎅이(Anomala rufocuprea) 3종이지만 주로 발생하는 풍뎅이류는 대부분 큰검정풍뎅이로 조사되었다. 굼벵이류에 의한 고구마 괴근 피해율은 지역에 따라 차이가 있었는데 평군 2-40%였고, 심한 경우는 80% 이상의 피해를 나타낸 포장도 있었다. 큰검정풍뎅이는 10월 하순부터 다음해 6월 하순까지 토양 속에서 3령의 노령유충으로 월동하였으며, 월동기간 동안 유충의 생존율은 92%로 매우 높았다. 고구마 포장에서 큰검정풍뎅이 유충은 7월 하순부터 8월 중순 사이에 발생하기 시작하였고, 고구마의 굼벵이 피해는 8월 하순부터 나타나기 시작하여 수확기까지 지속되었다.

• Journal of Ecology and Environment
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• 제33권1호
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• pp.47-57
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• 2010

To understand day-to-day fluctuations in soil moisture content in Seoul, I simulated daily soil moisture content from 1908 to 2009 using long-term climatic precipitation and temperature data collected at the Surface Synoptic Meteorological Station in Seoul for the last 98 years with a hydrological simulation model, BROOK. The output data set from the BROOK model allowed me to examine day-to-day fluctuations and the severity and duration of droughts in the Seoul area. Although the soil moisture content is highly dependent on the occurrence of precipitation, the pattern of changes in daily soil moisture content was clearly quite different from that of precipitation. Generally, there were several phases in the dynamics of daily soil moisture content. The period from mid-May to late June can be categorized as the initial period of decreasing soil moisture content. With the initiation of the monsoon season in late June, soil moisture content sharply increases until mid-July. From the termination of the rainy season in mid-July, daily soil moisture content decreases again. Highly stochastic events of typhoons from late June to October bring large amount of rain to the Korean peninsula, culminating in late August, and increase the soil moisture content again from late August to early September. From early September until early October, another sharp decrease in soil moisture content was observed. The period from early October to mid-May of the next year can be categorized as a recharging period when soil moisture content shows an increasing trend. It is interesting to note that no statistically significant increase in mean annual soil moisture content in Seoul, Korea was observed over the last 98 years. By simulating daily soil moisture content, I was also able to reconstruct drought phenomena to understand the severity and duration of droughts in Seoul area. During the period from 1908 to 2009, droughts in the years 1913, 1979, 1939, and 2006 were categorized as 'severe' and those in 1988 and 1982 were categorized as 'extreme'. This information provides ecologists with further potential to interpret natural phenomenon, including tree growth and the decline of tree species in Korea.

• 식물병연구
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• 제18권1호
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• pp.35-39
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• 2012

Phytophthora infestans에 의해 발생하는 토마토 잎마름 역병은 전 세계적으로 발생하여 토마토 생산에 막대한 피해를 준다. 이 병의 방제를 위하여 저항성 품종의 이용은 매우 중요하다. 저항성 품종육종의 초기 및 본 육종에서 토마토 유전자원의 저항성 평가는 매우 중요하다. 본 연구는 2009년에 유묘 및 성체식물을 대상으로 78종의 토마토 시판 품종과 계통에 대한 잎마름역병 저항성을 검정하였다. Legend를 포함한 모든 시판 품종은 감수성이지만, California 대학에서 분양 받은 KNU-2, KNU-6-1, KNU-11, KNU-13, KNU-14-1 계통과 저항성 유전자 Ph-3를 가지고 있는 L3708, $AV107-4{\times}L3708$, $07-15{\times}L3708$, $BS67{\times}L3708$ 및 $06-9-62A{\times}06-9-62A$ 계통은 고도의 저항성인 것으로 나타났다. 본 연구에서 선발된 토마토 잎마름역병에 고도의 저항성을 가지는 10계통은 저항성 품종육종을 위한 유용한 자원으로 활용될 수 있다.

• 한국응용곤충학회지
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• 제58권3호
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• pp.239-249
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• 2019

본 연구는 북방농업지대에서 벼 해충의 지역 간 발생상황을 비교하기 위하여 곤충의 발육에 필요한 온도를 이용하여 발생 시기를 추정하는 방법으로 발생세대수나 발생 시기 등을 비교하였다. 벼 해충 6종(벼물바구미, 벼잎벌레, 흰등멸구, 벼멸구, 혹명나방, 멸강나방)에 대해 유효적산온도를 이용하여 발생 시기를 추정한 결과 월동해충은 지역에 따라 발생 시기에 차이가 있었으며, 동북방향으로 갈수록 발생시기가 늦어져, 북부고산이나 동해안북부에서는 발생시기가 가장 늦었다. 또한 해충의 발생시기가 6월부터 8월 사이에는 비래해충 1세대 성충 발생시기와 같이 지역 간 발생 시기에 차이가 적어 비슷한 시기에 발생하였으며, 기온이 낮아지는 8월부터 9월에 발생시기가 되면 지역 간 차이가 커서 벼멸구의 2세대 성충이 발생하지 못하거나, 흰등멸구, 혹명나방, 멸강나방 등의 2~3세대 성충의 발생이 안 되는 지역이 많아지고 있음을 알 수 있었다. 이러한 특징으로 보아 북방지역의 동북지역, 동해안북부, 북부내륙, 북부고산지역에서의 벼해충 발생은 적을 것으로 추정되며, 중부산간의 평강, 양덕을 제외한 동해안남부, 수양산 이남, 이북지역은 국내 경기, 강원북부지역과 비슷한 발생을 보일 것으로 추정되었다.

• 한국전문물리치료학회지
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• 제12권2호
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• pp.98-104
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• 2005

This study was done to research the general information, causes of stroke, risk factors, complications during admission of geriatric CVA inpatients. We retrospectively studied 208 above 65 years old geriatric CVA inpatients treated in Ajou university hospital from 1994 to 2003 by medical record. These were divided into two groups by following years. We were gathered information about sex, onset age, cause of stroke, number of stroke, complications, housing, family, insurance, smoking, alcohol. Most of incidence of the stroke was noted in the group of young old age (65~74 years old) and old age (75~84 years old). The occurrence rate of male stroke (38.5%) was less than of female stroke (61.5%) and the ratio of male to female was 1:1.6. The occurrence rate of ischemic stroke (72.6%) was higher than of hemorrhagic stroke. The occurrence rate of ischemic stroke increased more and more at the late stage. The most common risk factors for stroke was hypertension and complications during hospitalization were neurogenic bowl and bladder. These results of epidemiologic study may help above 65 years old geriatric CVA early treatment and prevention, rehabilitation and use basic data for multiple prospective study using stroke registry.