• 한국작물학회지
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• 제29권1호
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• pp.67-71
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• 1984

참깨의 주요병해인 역병에 대한 품종선발시험과 엽고병에 대한 발병조건을 구명하기 위하여 포장과 온실을 이용하여 시험을 실시한 결과 다음과 같은 중요 사항이 관찰되었다. 1. 역병에 대한 저항성품종은 Orotall. Suweon 7, Suweon 27 및 조치원이 저항성 품종으로 나타났고 PI 280795, IS 103도 다소 강한 품종으로 보였다. 2. 참깨 엽고병예 대한 발병률은 고온인 3$0^{\circ}C$에서 광의품종이 15%, 김포품종이 25%의 병반면적률을 보였고, 저온인 17$^{\circ}C$에서는 광의가 50%, 김포가 70%로 높은 이병성을 보였다. 3. 참깨 엽고병의 발병률은 다습조건에서 품종 광의가 55%, 김포가 80%의 병반면적률을 보였고. 건조조건에서는 광의와 김포품종이 각각 10%와 15%의 병반면적률을 보임으로서 다습조건에서 심한 발병현상을 보였다. 4. 엽령별 엽고병 발병정도를 보면 6엽기와 개화기에 각각 20%와 52.5%의 병반면적률을 보여 심한 발병현상을 보였고, 10엽기와 20엽기에는 이보다도 낮은 발병률을 보였다.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2000년도 춘계학술발표대회
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• pp.583-583
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• 2000

• 한국작물학회:학술대회논문집
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• 한국작물학회 2006년도 한국약용작물학회 공동춘계학술발표회
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• pp.226-227
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• 2006

• Journal of Applied Biological Chemistry
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• 제62권3호
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• pp.293-297
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• 2019

Leaf rust is the most widespread and destructive fungal disease, and outbreaks have always caused considerable losses in wheat yields. Thus, worldwide increases in wheat production depend on the development of leaf rust-resistant wheat varieties. In this study, we evaluated the resistance of forty Korean wheat cultivars to leaf rust at the seedling stage. Only two Korean wheats, Ol and Jonong, were resistant to leaf rust, whereas the remaining thirty-eight Korean wheats were susceptible to leaf rust. The Ol and Jonong varieties presented larger dry seed weights and higher antioxidant activity in response to leaf rust than the susceptible wheat varieties. No differences in ${\beta}$-1,3-glucanase activity or chlorophyll content between resistant and susceptible wheat varieties were observed. Overall, these results are important for the development of wheat varieties that are highly resistant to leaf rust and to understand the underlying mechanisms that confer leaf rust resistance.

• Mycobiology
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• 제42권2호
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• pp.203-205
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• 2014

In 2010, symptoms of leaf and stem rot were observed on potted plants (Peperomia quadrangularis) in a greenhouse in Yongin, Korea. The causative pathogen was identified as Myrothecium roridum based on morphological data, internal transcribed spacer sequence analysis, and pathogenicity test. To our knowledge, this is the first report of M. roridum causing leaf and stem rot disease on P. quadrangularis in Korea and elsewhere worldwide.

• The Plant Pathology Journal
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• 제34권2호
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• pp.93-103
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• 2018

Leaf blotch of wheat caused by Bipolaris sorokiniana is a major constraint to wheat production, causing significant yield reduction resulting in severe economic impact. The present study characterizes to determine and compare pathogenic variability exist/not based on components of leaf blotch disease development and level of aggressiveness due to agroclimatic condition of B. sorokiniana in wheat. A total of 169 virulent isolates of B. sorokiniana isolated from spot blotch infected leaf from different wheat growing agroclimate of Bangladesh. Pathogenic variability was investigated on a susceptible wheat variety 'kanchan' now in Bangladesh. A clear evidence of positive relationship among the components was recorded. From hierarchical cluster analysis five groups were originating among the isolates. It resolved that a large amount of pathogenic diversity exists in Bipolaris sorokiniana. Variation in aggressiveness was found among the isolates from different wheat growing areas. Most virulent isolates BS 24 and BS 33 belonging to High Ganges River Flood Plain agro-climatic zones considered by rice-wheat cropping pattern, hot and humid weather, high land and low organic matter content in soil. Positive relationship was found between pathogenic variability and aggressiveness with agro-climatic condition.

• Journal of Ginseng Research
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• 제11권2호
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• pp.91-100
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• 1987

인삼(Panax ginseng C.A. Meyer) 엽소병에 대한 고사원인을 현상학적 측면에서 관찰, 분석한 결과 chlorohphyll의 bleaching현상은 적색광(660~700nm)에서 일어났으며, 청색광(400~500nm)에서는 광산화에 의한 bleaching현상이 일어나지 않았다. 엽소병에 의한 고사원인으로 대두되었던 환경요인 "온도"는 chlorohphyll의 bleaching현상에 전혀 영향을 미치지 않았다. 따라서 단순연소(simple burning)설은 본 실험을 통해 배재되었으며, 낮은 pH는 chlorohphyll의 bleaching속도를 가속화시켜 주었다. 엽소병에서 chlorohphyll의 bleaching현상을 유발시키는 1차적요인은 인삼잎의 독특한 구조적 차이에 의한 것이었다.

• 한국응용곤충학회지
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• 제19권4호
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• pp.203-211
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• 1980

실험포장에 있어서의 도열병발생상은 잎도열병의 발생량이 경한데 비해 통일계품종의 이삭도열병은 결발형이었고 일본형품종의 그것은 역시 경하였다. 시비수준간의 도열병 발생량의 차이는 통일계품조의 경우 잎도열병에서는 뚜렷하게 나타났으나 이삭도열병에서는 뚜렷하지 않았다. 지엽(n-1)이나 그 아래에 있는 n-2엽, n-3엽 등에서 강우수나 엽상의 노적수에서 만들어지 포자현탁액이 엽신에서 엽초의 봉합부를 거쳐 엽초내에 침투하고 수에 접착한 다음 감염을 일으키는 것으로 판명되었다. 자연환경하에서나 인공환경아래에서도 엽초내에 포자현탁액을 주입하면 수의 각부분이 감염되었으며 자연환경아래에서 생육중인 수도의 수잉기엽초내에는 도열병균과 그밖에 여러가지 진균의 포자가 검출되어 수잉기엽초내에서의 수열병 감염이 가능한 것으로 판명 되었다. 실험포장에서의 통일계품종의 이삭도열병의 발병은 $90\%$내외이며 이 중에 수잉기 감염이 출수후 감염보다 훨씬 많으며 0.5N 시비구에서는 $6\~15$배, 1.0구에서는 $10\~40$배, 1.5N 구에서는 $7\~20$배 가량이 많았다. 한편 일본형수도품종에 있어서는 이삭도열병의 감염율은 $3\%$에 지나지 않았다.

• Industrial Engineering and Management Systems
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• 제4권1호
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• pp.102-108
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• 2005

This paper studies medical data classification methods, comparing decision tree and system reconstruction analysis as applied to heart disease medical data mining. The data we study is collected from patients with coronary heart disease. It has 1,723 records of 71 attributes each. We use the system-reconstruction method to weight it. We use decision tree algorithms, such as induction of decision trees (ID3), classification and regression tree (C4.5), classification and regression tree (CART), Chi-square automatic interaction detector (CHAID), and exhausted CHAID. We use the results to compare the correction rate, leaf number, and tree depth of different decision-tree algorithms. According to the experiments, we know that weighted data can improve the correction rate of coronary heart disease data but has little effect on the tree depth and leaf number.

• 한국식물병리학회지
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• 제10권1호
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• pp.47-53
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• 1994

Incidences of blast caused by Pyricularia grisea Sacc. on 24 leading cultivars and elite lines of rice were investigated in the fields at Icheon, chuncheon, Jecheon, Naju from 1990 to 1992. In the blast nursery, disease index of leaf blast on Jinmibyeo and Ilpumbyeo were very low as 1 to 3 at Naju, but as high as 6 to 9 at Icheon and other Chuncheon in 1990, but the disease did not occur in other locations and years. The most variable incidence of temporal and spatial leaf blast was observed on Nagdongbyeo, which was 30.6% at Icheon and 2.1% at Chuncheon on 1990, but the disease did not occur at Naju during the investigation. Percentages of diseased panicles on Chucheongbyeo were 11.6% in 1990 and 4.3% in 1992 at Icheon. Odaebyeo and Sobaekbyeo revealed more severe blast occurrences at Chuncheon and Sangju where the elevation was higher than the other places. Regional race distributions of rice blast fungus were more variable at Icheon and Chuncheon than the others.