• 식물병연구
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• 제16권3호
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• pp.320-322
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• 2010

2010년 2월 경기도 용인시 소엽풍란 재배농가에서 뿌리와 벌브가 심하게 마르고 식물체 전체가 말라죽는 증상이 나타났다. 마른 뿌리와 수태표면에 흰색 곰팡이 균사와 함께 뚜렷한 둥근 형태의 적갈색 균핵이 관찰되었다. 균학적 특징으로 균사는 $25{\sim}30^{\circ}C$에서 가장 활발한 생장을 보였으며, 균핵은 갈색의 둥근형태로 직경은 1~3 mm였다. 병원성 검정결과 발병이 초기부터 빠른 강한 병원성을 보였다. 균학적 특성 조사 결과 Sclerotium rolfsii에 의한 흰비단병으로 동정하였으며 본 병을 소엽풍란 흰비단병으로 명명하였다.

• 식물병연구
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• 제17권3호
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• pp.402-404
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• 2011

2009년 9월 경기도 동두천시와 화성시 소재 농가에서 팔레놉시스 재배중 생육이 부진하고 하엽이 황화되며 심한 경우 뿌리와 기부가 마르고 식물체 전체가 말라죽는 증상이 발생하였다. 말라죽은 기부와 수태표면에 흰색 곰팡이 균사와 함께 둥근 형태의 적갈색 균핵이 관찰되었다. 균학적 특징으로 균사는 $25-30^{\circ}C$에서 가장 활발한 생장을 보였으며, 균핵은 갈색의 둥근형태로 직경은 1-3 mm 였다. 병원성 검정결과 병징이 접종 후 5일째 관찰되었으며 그 후 급속하게 진전되어 강한 병원력을 보였다. 팔레놉시스에서 발생한 병징과 병원균의 균학적 특징 및 병원성을 검정한 결과 이 증상은 Sclerotium rolfsii에 의한 흰비단병으로 동정되어 본 병을 팔레놉시스 흰비단병으로 명명하고자 한다.

• 식물병연구
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• 제30권2호
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• pp.181-188
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• 2024

Southern blight, caused by the soil-borne fungus Sclerotium rolfsii, is a serious disease that affects many economically important crops. In this study, we selected Bacillus subtilis GJ6-14, from a total of 260 strains, to control Southern blight in pepper plants. In both seedling and plant tests, GJ6-14 significantly suppressed disease incidence and severity compared to control, furthermore, GJ6-14 demonstrated efficient colonization in the rhizosphere by maintaining the population from log 5.41 to log 3.92 in the pathogen-inoculated plants, indicating its potential as a biocontrol agent. Molecular analysis revealed up-regulation of defense-related genes, such as a 7.6-fold increase in LOX1 and 15.5-fold increase in PR1, at 72 hr after inoculation of S. rolfsii in GJ6-14-treated plants, suggesting activation of plant defense mechanisms. Overall, our findings highlight the promising role of B. subtilis GJ6-14 as a potential biocontrol agent in sustainable management of Southern blight in pepper plants.

• 한국미생물·생명공학회지
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• 제46권4호
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• pp.395-402
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• 2018

The efficacy of formulated Trichoderma harzianum-based Tricho-compost, seed treatment with Tricho-inocula, and chemical fungicide Provax 200 WP against foot and root rot diseases of wheat caused by Sclerotium rolfsii was tested in the pot house and in the research field of Plant Pathology Division, Bangladesh Agricultural Research Institute, Gazipur, Bangladesh. Tricho-compost was prepared with a mixed substrate of cow dung, rice bran, and poultry refuse colonized by T. harzianum. Seedling mortality of wheat was significantly reduced by the Tricho-compost, Tricho-inocula, and Provax 200 WP both in the pot house as well as in the field experiments. The yield of wheat was sharply increased over the control due to the T. harzianum formulations and Provax 200 WP. Among the treatments, soil application of Tricho-compost was more efficient in reducing seedling mortality and accelerating plant growth with an increased yield of wheat with S. rolfsii-inoculated pot cultures and field experiments.

• 식물병과 농업
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• 제5권2호
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• pp.119-121
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• 1999

A destructive collar rot of safflower occurred severely research farm of at Kyongsangnam-do Agricultural Research and Extension Services in 1999. Incidence of the disease at 3 fields in Chinju was ranged from 21.6 to 34.2% Upper parts of infected stems were mostly blighted and white mycelia were found on the lesions. The same fungus was isolated consistently from the infected tissues and confirmed its pathogenecity to safflower. The causal fungus of collar rot disease was identified as Sclerotium rolfsii by the examination of colony type sclerotium formation and pathogenicity test. This fungus also causes stem rot crown rot wilt or blight on the safflower. This is the first report on the collar rot of safflower caused by Sclerotium rolfsii in Korea.

• The Plant Pathology Journal
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• 제15권4호
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• pp.236-241
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• 1999

Sclerotinia twig blight on trees and cottony rot on fruits of Satsuma mandarin were observed in Cheju, Korea in 1996 and 1997. The causal fungus causing citrus twig blight and cottony rot was identified as Sclerotinia sclerotiorum which had cup-shaped apothecia bearing hyaline and clavate asci and periphyses on sclerotium. Symptoms were produced on twigs, developing young leaves, fully developed new leaves, and fruits 2-9 days after wound inoculation, but only on twigs with young lateral buds and developing young leaves by unwound inoculation. The fungus grew well between 10 and $27^{\circ}$, but optimum temperature was $24^{\circ}$ on potato dextrose agar. Most varieties were highly susceptible to S. sclerotiorum, whereas some varieties such as Ichinan were relatively resistant among twelve Satsuma mandarin varieties in the field. This is the first record of Scledrotinia twig blight on trees and cottony rot on stored fruits of Satsuma mandarin in Korea.

• Mycobiology
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• 제30권4호
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• pp.244-246
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• 2002

A destructive stem rot of tomato(Lycopersicon esculentum) occurred sporadically some farmers' fields in Jinju City, Gyeongnam province in Korea. The infected plants also showed stem, crown rot or whole plant blight. White mycelium spread over stems of infected plants and formed sclerotia on the old lesions nearby soil surface. The fungus showed maximum mycelial growth around $30^{\circ}C$. The fungus formed white colony on PDA, usually with many narrow mycelial strands in the aerial mycelium and the width were $4.0{\sim}9.8{\mu}m$. The typical clamp connections were formed on the mycelium. Numerous sclerotia was formed on PDA at $30^{\circ}C$. The shape of sclerotia was globoid and $1.0{\sim}3.0$ mm in size. The fungus was isolated repeatedly from the infected tissues and the pathogenicity was confirmed to tomato and identified as Sclerotium rolfsii. This is the first report on the stem rot of tomato caused by S. rolfsii in Korea.

• Mycobiology
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• 제32권2호
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• pp.95-97
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• 2004

In July 2002, a destructive stem rot of tawny daylily(Hemerocallis fulva) was occurred sporadically in exhibition farm of Gyeongsangnam-do Agricultural Research and Extension Services located in Hamyang-gun, Korea. The fungus also caused collar and crown rot, and systemic wilt or blight of whole plant. White mycelium spread over stems and petioles of infected plants and sclerotia were formed on the old lesions and near the soil surface. The optimum temperature for mycelial growth and scierotial formations was $30^{\circ}C$ on PDA. The mycelial width ranged $4.2{\sim}10.4{\mu}m$ and the color was white, usually many narrow mycelial strand grew in the aerial mycelium and formed clamp connection. The shape of sclerotia was spherical and $1.0{\sim}3.2$ mm in diameter. The fungus was isolated repeatedly from the infected tissues and confirmed its pathogenicity to Hemerocallis fulva and identified as Sclerotium rolfsii. This is the first report on the stem rot of H. fulva caused by S. rolfsii in Korea.

• 한국균학회지
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• 제29권1호
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• pp.72-74
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• 2001

2000년 9월 상순경 경상남도 의령군 가례면 밭 미나리 재배포장에서 미나리 흰비단병(Sclerotium rolfsii)이 대발생하였다. 이 병의 병징은 미나리 줄기 절단부가 갈색으로 변하고 물러져 썩으며 그 위에 흰색의 곰팡이가 솜털처럼 밀생하고, 병발부위에 작은 갈색의 둥근 균핵을 형성하며 지제부 부근의 토양 표면에도 형성되었다. 균사의 폭은 $4.1{\sim}10.3{\mu}m$이고, 균사 생육적온은 $30^{\circ}C$에서 90.0 mm로 가장 잘 자랐으며 $5^{\circ}C$와 $45^{\circ}C$에서는 자라지 않았다. PDA 배지상에는 $20^{\circ}C$에서 균핵을 많이 형성하였다. 균총의 색깔은 흰색이며 clamp connection이 있는 것이 특징이다. 균핵의 모양은 구형이며 크기는 $1.0{\sim}6.3{\times}10{\sim}5.2mm$ (평균 $2.4{\sim}2.2mm$)이었다. 이 병원균을 Sclerotium rolfsii로 동정하였고, 미나리 흰비단병으로 명명할 것을 제안한다.

• Mycobiology
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• 제30권2호
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• pp.102-104
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• 2002

In July 2001, a destructive stem rot of tatarian aster(Aster taturicus) was occurred sporadically in exhibition farm of Gyeongsangnam-do Agricultural Research and Extension Services, in Hamyang, Korea. The fungus also caused collar and crown rot and systemic wilt or blight of whole plant. White mycelium spread over stems and petioles of infected plants and sclerotia formed on the old lesions and near the soil surface. The fungus showed maximum mycelial growth was obtained around $30^{\circ}C$ but did not grow below $5^{\circ}C$ or above $45^{\circ}C$. The mycelial width ranges $4.2{\sim}10.4{\mu}m$. and the color is white, usually many narrow mycelial stand grow in the aerial mycelium and formed clamp connection. Numerous sclerotia were formed in artificial media like PDA at $30^{\circ}C$. The shape of sclerotia were sphere and $1.0{\sim}3.2{\mu}m$ in diameter. The fungus was isolated repeatedly from the infected, tissues and confirmed its pathogenecity to aster and identified as Sclerotium rolfsii. This is the first report that Sclerotium rolfsii causes stem rot of tatarian aster in Korea.