• Title/Summary/Keyword: mycological characteristics

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Taxonomic Studies on Cercospora and Allied Genera in Korea (V) (한국산 Cercospora 및 관련 속의 분류학적 연구 (V))

  • Kim, Jeong-Dong;Shin, Hyeon-Dong
    • The Korean Journal of Mycology
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    • v.27 no.1 s.88
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    • pp.44-53
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    • 1999
  • This paper is the fifth contribution towards taxonomic studies on Cercospora and allied genera, and contains ten species of Korean cercosporoid fungi; viz., Cercospora adusta, C. chrysanthemi, C. ludwigiana, C. zebrina, Passalora depressa, Pseudocercospora destructiva, P. lonicericola, P. nojimai, Pseudocercosporella inconspicua, and Ramularia major. Morphological characteristics of taxonomic value are described and illustrated for these species to contribute towards a mycological monograph of Korean cercosporoid fungi.

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Taxonomic Studies on Cercospora and Allied Genera in Korea (XI) (한국산 Cercospora 및 관련 속의 분류학적 연구(XI))

  • Kim, Jeong-Dong;Shin, Hyeon-Dong
    • The Korean Journal of Mycology
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    • v.27 no.5 s.92
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    • pp.354-362
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    • 1999
  • This paper is the eleventh contribution towards taxonomic studies on Cercospora and allied genera, and contains ten species of Korean cercosporoid fungi; viz., Cercospora castaneae, C. dispori, C. ilicisopacae, C. malvarum, Phaeoramularia valerianicola, Pseudocercospora clematidis, P. cotoneasteris, P. handelii, P. lespedezicola, and Ramularia chaerophylli. Morphological characteristics of taxonomic value are described and illustrated for these species to contribute towards a mycological monograph of Korean cercosporoid fungi.

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Taxonomic Studies on Cercospora and Allied Genera in Korea (XII) (한국산 Cercospora 및 관련 속의 분류학적 연구(XII))

  • Kim, Jeong-Dong;Shin, Hyeon-Dong
    • The Korean Journal of Mycology
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    • v.27 no.5 s.92
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    • pp.363-371
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    • 1999
  • This paper is the twelfth contribution towards taxonomic studies on Cercospora and allied genera, and contains ten species of Korean cercosporoid fungi; viz., Cercospora brunkii, C. deutziae, C. granuliformis, C. hostae, Mycovellosiella nattrassii, Pseudocercospora chrysanthemicola, P. geicola, P. mississippiensis, P. viburnicylindrici, and Ramularia moehringiae. Morphological characteristics of taxonomic value are described and illustrated for these species to contribute towards a mycological monograph of Korean cercosporoid fungi.

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Occurrence of Boxthorn Bligth Casued byPhytophthora nicotivanea and P. drechsleri (Phytophthora nicotianae와 P. drechsleri에 의한 구기자 역병의 발생)

  • 지형진;곽용범;이봉춘;조원대
    • Korean Journal Plant Pathology
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    • v.14 no.4
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    • pp.294-298
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    • 1998
  • Since 1995, boxthorn bight caused by Phytophthora spp. has occurred at Chongyang areas in Chungnam province. Infected plants showed yellows and wilt at early stage, but the symptom rapidly progressed into blight due to the decay of roots and basal stem tissues. The disease was relatively severe in poorly drained lowlands and incidence reached ca. 20% in some fields. Two species of Phytophthora were constantly isolated from freshly infected roots and asal stems. Among 39 isolates collected, 26 were identified as P. nicotianae and 13 as P. drechsleri based on their mycological characteristics. Both fungi showed strong pathogenicity to boxthorn cv. Chongyang No. 1. However, the former expressed stronger pathogenicity than the latter. Phytophthora blight of boxthorn caused by the fungi has not been reported n Korea previously.

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First Report of Sclerotium Rot on Cymbidium Orchids Caused by Sclerotium rolfsii in Korea

  • Han, Kyung-Sook;Lee, Seong-Chan;Lee, Jung-Sup;Soh, Jae-Woo;Kim, Su
    • Mycobiology
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    • v.40 no.4
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    • pp.263-264
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    • 2012
  • Sclerotium rot was found on Cymbidium orchids at Seosan-si, Chungcheongnam-do, Korea, in July, 2010. Symptoms occurred on low leaves, which turned yellowish, after which the entire plant wilted. Severely infected plants were blighted and eventually died. White mycelial mats and sclerotia appeared on pseudobulbs. Based on the mycological characteristics and pathogenicity, the causal fungus was identified as Sclerotium rolfsii. This is the first report of new Sclerotium rot on Cymbidium spp. caused by S. rolfsii in Korea.

Sooty Mold of Persimmon (Diospyros kaki) Caused by Cladosporium cladosporioides

  • Kwon, Jin-Hyeuk;Park, Chang-Seuk
    • The Plant Pathology Journal
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    • v.19 no.5
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    • pp.266-268
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    • 2003
  • In 2002, sooty mold was observed on persimmon (Diopyros kald) from the Jinju Agricultural Products Wholesale Market in Gyeongnam, Korea. The lesion of the sooty mold usually appeared as scars or wounds formed on the surface of the fruits. The symptom started with water soaking lesion, then the fruit softened rapidly. Colony of the causal pathogenic fungus was dark green in color on potato dextrose agar. The diameter of growing hyphae was 1-2 $\mu\textrm{m}$. The mostly one-celled conidia were ovoid, lemon or cylinder in shape, blastophores, and sized 46-132 $\mu\textrm{m}$. Erected conidiophores were long-branched chains and their lengths varied from 24 to 346 $\mu\textrm{m}$ with 2-5 $\mu\textrm{m}$ width. The optimum temperature for mycelial growth was about 2$0^{\circ}C$. Based on their mycological characteristics, the fungus was identified as Cladosporium cladosporioides. This is the first report in Korea of the sooty mold of persimmon caused by the said fungus.

Occurrence of Stem Rot of Disporum smilacinum Caused by Sclerotium rolfsii in Korea

  • Kwon, Jin-Hyeuk;Jee, Hyeong-Jin
    • The Plant Pathology Journal
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    • v.23 no.3
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    • pp.212-214
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    • 2007
  • In 2005 and 2007, a basal stem rot of Disporum smilacinum caused by Sclerotium rolfsii occurred sporadically in a herb farm at Hamyang, Korea. The symptom initiated with water-soaking lesion and progressed into stem rot and wilt of a whole plant. Severely infected plants were blighted and died eventually. White mycelial mats appeared on the lesion at early stage and a number of sclerotia were formed on the stem near the soil line. The sclerotia were globoid in shape, 1-3 mm in size and white to brown in color. The optimum temperature for the growth and sclerotia formation was 30 on PDA and the hyphal width was measured $3-8{\mu}m$. The typical clamp connections were observed in the hyphae of the fungus grown on PDA. On the basis of symptom, mycological characteristics and pathogenicity to the host plant, this fungus was identified as Sclerotium rolfsii Saccardo. This is the first report on the stem rot of D. smilacinum caused by S. rolfsii in Korea.

Taxonomic Studies on Cercospora and Allied Genera in Korea (III) (한국산 Cercospora 및 관련 속의 분류학적 연구 (III))

  • Kim, Jeong-Dong;Shin, Hyeon-Dong
    • The Korean Journal of Mycology
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    • v.26 no.4 s.87
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    • pp.424-436
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    • 1998
  • This paper is a third contribution towards taxonomic studies on Cercospora and allied genera, and contains ten species of Korean cercosporoid fungi; viz. Cercospora achyranthis, C. canescens, C. fukushiana, C. polygonacea, Cercosporella virgaureae, Pseudocercospora fukuokaensis, P. puerariicola, Ramularia cynarae, R. inaequalis, and R. rubella. Morphological characteristics of taxonomic value are described and drawn for these species to contribute towards a mycological monograph of Korean cercosporoid fungi.

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Taxonomic Studies on Cercospora and Allied Genera in Korea (X) (한국산 Cercospora 및 관련 속의 분류학적 연구(X))

  • Kim, Jeong-Dong;Shin, Hyeon-Dong
    • The Korean Journal of Mycology
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    • v.27 no.3 s.90
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    • pp.220-230
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    • 1999
  • This paper is the tenth contribution towards taxonomic studies on Cercospora and allied genera, and contains ten species of Korean cercosporoid fungi; viz., Cercospora coreopsidis, C. hydrangeae, C. physalidis, C. ricinella, C. volkameriae, Pseudocercospora abelmoschi, P. cruenta, P. varia, Pseudocercosporella paridicola, and Ramularia grevilleana var. grevilleana. Morphological characteristics of taxonomic value are described and illustrated for these species to contribute towards a mycological monograph of Korean cercosporoid fungi.

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Taxonomic Studies on Cercospora and Allied Genera in Korea (IX) (한국산 Cercospora 및 관련 속의 분류학적 연구(IX))

  • Kim, Jeong-Dong;Shin, Hyeon-Dong
    • The Korean Journal of Mycology
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    • v.27 no.3 s.90
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    • pp.211-219
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    • 1999
  • This paper is the ninth contribution towards taxonomic studies on Cercospora and allied genera, and contains ten species of Korean cercosporoid fungi; viz., Cercospora citrullina, C. gomphrenae, C. mirabilis, C. plantaginis, C. tabacina, Mycovellosiella ariae, Pseudocercospora contraria, P. lythracearum, P. rubi var. subhyalina, and Ramularia wisconsina. Morphological characteristics of taxonomic value are described and illustrated for these species to contribute towards a mycological monograph of Korean cercosporoid fungi.

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