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Sclerotinia sclerotiorum에 의한 바질 균핵병
함수상,김병련,한광섭,권미경,박인희,Hahm, Soo Sang,Kim, Byoung Ryun,Han, Kwang Seop,Kwon, Mi Kyung,Park, In Hee 한국식물병리학회 2017 식물병연구 Vol.23 No.1
2011년부터 2013년까지 예산 지역의 농가포장에서 재배 중인 바질에서 균핵병으로 의심되는 증상이 지속적으로 관찰되었다. 초기에는 잎과 줄기가 갈색으로 변하기 시작하여 반점이 커지면서 점차 위쪽으로 진전, 위조하여 결국 전체적으로 썩어 죽는다. 잎과 줄기의 병반부에는 다량의 흰색 균사가 발생하며 $30-100{\mu}m$ 직경의 균핵이 형성하였다. PDA상에 균체는 흰색과 옅은 초콜릿 흑색으로 다양한 색을 나타내었고, 균핵은 검은색으로 대부분 불규칙한 구형이며 크기는 $5-50{\mu}m$였다. 병원균을 인위적으로 접종한 바질의 잎과 줄기에서는 자연 발생된 바질과 동일한 괴사와 위조증상을 보이며, 병반에서 역시 같은 균을 분리하였다. 이상과 같이 병원균의 균학적 특징, ITS 염기서열 분석, 병원성 검정 결과 본 병해는 Sclerotinia sclerotiorum에 의한 바질균핵병으로 명명할 것을 제안한다. During growing season of 2011 to 2013, Sclerotinia rot symptoms consistently have been observed on basil in Yesan-gun, Chungcheongnam-do in Korea. The typical symptom formed initially brownish spot on leaf and stem, and then advancing margins, wilting the whole plant and blighting, eventually died. On the surface of diseased lesions was observed cottony, white, dense mat of mycelial growth, and sclerotia ($30-100{\mu}m$ diameter) formed on stem and leaf. Morphological and cultural characteristic on potato dextrose agar, color of colony was white and colorless chocolate, sclerotium of irregular shape of the oval was black and $5-50{\mu}m$ diameter in size. In pathogenicity test, necrosis and wilt of the inoculated stem were observed in all plants and the pathogen was reisolated from stems. On the basis of mycological characteristics, pathogenicity, and internal transcribed spacer rDNA sequence analysis, this fungus was identified as Sclerotinia sclerotiorum. This is the first report of Sclerotinia rot on basil caused by S. sclerotiorum in Korea.
김병련(Byung-Ryun Kim),함수상(Soo-Sang Hahm),권미경(Mi-Kyung Kwon),김윤정(Yun-Jeong Kim),김운섭(Woon-Seop Kim),송정영(Jeong-Young Song),오상근(Sang-Keun Oh),주정일(Jung-Il Ju) 한국식물병리학회 2021 식물병연구 Vol.27 No.4
Pseudoperonospora cubensis (downy mildew) is highly virulent to various Cucurbitaceae crops, including cucumber (Cucumis sativus). We tested chlorine dioxide application in a plastic greenhouse for environment- friendly control of downy mildew disease. Spraying diluted chlorine dioxide suppressed downy mildew dis- ease with 41.2% control efficacy. Thermal fogging with chlorine dioxide had a high control efficacy of 80.9%, confirming that this approach is useful for environment-friendly downy mildew control. Using thermal fog- ging to control diseases that are greatly affected by humidity, such as downy mildew, may be more effective compared with conventional dilution spray control methods.
New Cultivar of Asiatic Hybrid Lily, ‘Black Sun’ with Greyed Purple Color in Flower
이찬구(Chan-Gu Lee),이기환(Ki-Hwan Lee),함수상(Soo-Sang Hahm),경기천(Ki-Cheon Kyung),김운섭(Woon-Seop Kim),홍계완(Kye-Wan Hong),이종원(Jong-Won Lee),최종진(Jong-Jin Choi),이희덕(He-Duck Lee),이은모(Eun-Mo Lee) 한국원예학회 2011 한국원예학회 학술발표요지 Vol.2011 No.5
김병련(Byung Ryun Kim),권미경(Mi Kyung Kwon),함수상(Soo Sang Hahm),김윤정(Yun Jeong Kim),이순계(Sun Gye Lee),이상범(Sang Bum Lee) 한국농약과학회 2019 농약과학회지 Vol.23 No.4
This study was carried out to develop the economic thresholds for the control of rhizome diseases of ginger. The investigations revealed highly significant correlations between disease severity (diseased plants) and yields. The correlation coefficients between rhizome diseases severity and yields was −0.98. The yield was inversely proportional to the diseased plants increased. The regression equation, yield prediction model, between disease severity (x) and yield (y) was obtained as y = -31.29x + 1818.6 (R² = 0.9642). Based on the yield prediction model, economic injury level and the economic threshold level could be set at 4.1% and 3.3% of diseased plants of rhizome diseases on ginger.