• Title/Summary/Keyword: Colletotrichum

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Anthracnose of Cosmos Caused by Colletotrichum acutatum in Korea

  • Kwon, Jin-Hyeuk;Kang, Soo-Woong;Son, Kyung-Ae;Park, Chang-Seuk
    • The Plant Pathology Journal
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    • v.15 no.3
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    • pp.172-174
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    • 1999
  • Anthracnose of cosmos caused by Colletotrichum acutatum is reported for the first time in Korea. The disease occurred widely in Kyeongnam province in1998 and the symptoms of sunken brownish spots were severely developed on stems. The fungi showed strong pathogenicity to the plant and are required at least 3 hr for conidial germination and host infection.

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Black Dot Root Rot of Tomato Caused by Colletotrichum coccodes (Colletotrichuym coccodes에 의한 토마토 검은점뿌리썩음병(흑점근부병))

  • 김완규;지형진;조원대
    • Korean Journal Plant Pathology
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    • v.14 no.3
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    • pp.209-211
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    • 1998
  • Black dot root rot occurred severely in greenhouse tomatoes in jangseong area of Korea in April, 1996. The causal fungus of the disease was identified as Colletotrichum coccodes based on the morphological and cultural characteristics. Pathogenicity tests revealed that isolates of the fungus were responsible for the disease, and two cultivars of cherry tomato were less susceptible to the disease than other cultivars of tomato and cherry tomato tested.

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Identification and Characterization of New Record of Grape Ripe Rot Disease Caused by Colletotrichum viniferum in Korea

  • Oo, May Moe;Oh, Sang-Keun
    • Mycobiology
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    • v.45 no.4
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    • pp.421-425
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    • 2017
  • In 2016, grape fruits showing ripe rot symptom were found in fields of Korea. The fungus was isolated and identified as Colletotrichum viniferum based on morphological characteristics and nucleotide sequence data of the internal transcribed spacer, glyceraldehyde-3-phosphate dehydrogenase and ${\beta}$-tubulin. To our knowledge, this is the first report of C. viniferum causing grape ripe rot disease of grape fruits in Korea.

Occurrence of Anthracnose on Chinese Mallow Caused by Colletotrichum malvarum

  • Kim, Wan-Gyu;Hong, Sung-Kee;Kim, Jin-Hee
    • Mycobiology
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    • v.36 no.2
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    • pp.139-141
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    • 2008
  • Anthracnose symptoms were frequently observed on leaves, petioles, and stems of Chinese mallow grown in Namyangju, Korea, during a disease survey performed in November, 2007. The disease incidence was as high as 30% in the 12 greenhouses investigated. A total of 38 isolates of the Colletotrichum species were obtained from the anthracnose symptoms, and all the isolates were identified as Colletotrichum malvarum based on their morphological and culture characteristics. Three isolates of the fungus caused anthracnose symptoms on leaves and stems following artificial inoculation, which were similar to those observed during the greenhouse survey. In this study, mycological and pathological characteristics of C. malvarum identified as causing anthracnose of Chinese mallow were clarified.

Occurrence of Anthracnose on English Ivy Caused by Colletotrichum trichellum in Korea

  • Kim, Wan-Gyu;Hong, Sung-Kee;Cho, Weon-Dae
    • Mycobiology
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    • v.29 no.2
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    • pp.107-109
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    • 2001
  • Anthracnose symptoms severely occurred up to 50% on leaves of English ivy growing in greenhouses in Cheongwon area of Korea during disease survey in April, 2000. The symptoms developed as concentric spots with dot-like acervuli on leaves of the plant. A total of 24 isolates of Colletotrichum sp. were obtained from the spotted lesions and identified as Colletotrichum trichellum based on the morphological and cultural characteristics. Leaf spots similar to the original anthracnose symptoms were induced on the host leaves by artificial inoculation with the isolates of the fungus. This is the first record of C. trichellum causing anthracnose of English ivy in Korea.

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Anthracnose of Perilla Caused by Colletotrichum spp. and Glomerella cingulata

  • Kim, Wan-Gyu;Lee, Byung-Dae;Cho, Weon-Dae;Shin, Dong-Bum
    • The Plant Pathology Journal
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    • v.17 no.4
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    • pp.236-241
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    • 2001
  • Serve outbreaks of anthracnose were observed on perilla plants grown in greenhouses and open fields in several locations in Korea during the disease survey from 1997 to 2000. A total of 53 isolates of Colletotrichum spp. and Glomerella sp. was obtained from diseased perilla plants and identified based on their morphological and cultural characteristics. Forty isolates were identified as Colletotrichum gloeosporioides, three isolates as C. coccodes, five isolates as C. dematium, and the other five isolates as Glomerella cingulata, the teleomorph of C. gloeosporioides. All isolates of C. gloeosporioides tested by artificial inoculation were strongly virulent on perilla plants, but isolates of the other species were weakly or not virulent. Anthracnose symptoms induced on the perilla plants by artificial inoculation with the isolates of C. gloeosporioides were similar to those observed in the fields. This study revealed that C. gloeosporioides is the main causal fungus of perilla anthracnose.

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A New Anthracnose of Neoregelia carolinae Smith var. tricolor Hort. Caused by Colletotrichum gloeosporioides Penz. (Colletotrichum gloeosporioides Penz에 의한 Neoregelia carolinae Smith var. tricolor Hort. 炭疽病)

  • Kim, Wan-Gyu
    • The Korean Journal of Mycology
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    • v.15 no.2
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    • pp.116-117
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    • 1987
  • 1985년 9월, 경기지방의 꽃 재배온실에서 네오레게리아(Neoregelia carolinae Smith var, tricolor Hort.)에 탄저병징이 심하게 발생하여, 병반에서 병원균을 분리, 동정한 결과 Colletotrichum gloeosporioides Penz.에 의한 것으로 밝혀졌다. 이 균은 PDA배양에서 완전세대 Glomerella cingulata (Stonem.) Spauld. & v. Sch.의 자낭과 자낭포자를 형상하였다. 병징은 2-5mm 크기로 원형 내지 타원형의 적갈색 반점이며, 반점 주위는 황색을 띄었다. 병이 심하게 진전되면 잎의 대부분이 황갈색으로 변하여 말라 죽었다. 이 균의 분생포자현탁액을 네오레게리아에 분무접종한 결과 병원성이 확인되었다. C. gloeosporioides에 의한 네오레게리아 탄저병은 아직까지 보고된 바 없으므로 새로운 탄저병으로 보고한다.

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Chilli anthracnose (Colletotrichum spp.) disease and its management approach

  • Oo, May Moe;Oh, Sang-Keun
    • Korean Journal of Agricultural Science
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    • v.43 no.2
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    • pp.153-162
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    • 2016
  • Chilli is a widely consumed crop throughout the world. However, chilli anthracnose is a major constraint in chilli production leading to huge economic losses worldwide. Colletotrichum is a large genus of Ascomycete fungi, containing species that cause anthracnose diseases on a wide range of crops of economic value. This review is aimed at critically and accurately examining the taxonomic identification of Colletotrichum species by morphological and molecular approaches as well as assessing their management options. The use of appropriate integrated management practices, such as cultural, mechanical, chemical, and biological control, are important in chilli anthracnose disease prevention and control. Emphasis is laid on the use of biological control because it is cost effective and eco-friendly, and is an appropriate approach for disease management. The use of resistant cultivars is the cheapest, easiest, safest, and most effective means of controlling crop diseases. But, since no resistant cultivars of chilli have been developed and commercialized, it is very important to develop biological management strategies. Further studies leading to integrated disease management strategies need to be carried out.

Occurrence of Anthracnose on Indian Fig Cactus Caused by Glomerella cingulata and Colletotrichum gloeosporioides

  • Kim, Wan-Gyu;Cho, Weon-Dae;Jee, Hyeong-Jin;Hong, Soon-Yeong
    • The Plant Pathology Journal
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    • v.16 no.5
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    • pp.294-296
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    • 2000
  • Anthracnose symptoms were frequently found on stems of Indian fig cactus in Cheju island of Korea in 1998 and 1999. Typical symptoms were gray to black dry rot of stems with concentric arrays of dot-like spots. A Glomerella sp. or a Colletotrichum sp. was frequently isolated from the symptoms, both of which were identified as Glomerella cingulata and its anamorph, Colletotrichum gloeosporioides based on their morphological and cultural characteristics. Out of 31 isolates obtained from the symptoms, 12 isolates were the anamorph producing only conidia, four isolates the telemorph producing only ascospores, and 15 isolates the holomorph producing both spores on potato dextrose agar. Stem rots similar to the original anthracnose symptoms were induced by wound inoculation of conidia and ascospores but not by non-wound inoculation. The anamorphic isolates caused more extensive stem rot than the telemorphic and holomorphic ones.

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Occurrence of Anthracnose on Welsh Onion Caused by Colletotrichum circinans

  • Kim, Wan-Gyu;Hong, Sung-Kee;Kim, Jin-Hee
    • Mycobiology
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    • v.36 no.4
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    • pp.274-276
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    • 2008
  • Anthracnose occurred frequently on leaf sheaths of Welsh onions grown in Gangwha island, Korea in November, 2007. The disease incidence was as high as 30% in five fields investigated. A total of 20 single spore isolates of Colletotrichum species were obtained from the affected plants, and all the isolates were identified as Colletotrichum circinans based on their morphological and cultural characteristics. Three isolates of the fungus caused anthracnose symptoms on the leaf sheaths of Welsh onions by artificial inoculation, which were similar to those observed during the field survey. In this study, the mycological and pathological characteristics of C. circinans identified as causing anthracnose of Welsh onions are clarified.