• 제목/요약/키워드: Fischer's ragwort

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First Report of Leaf Spot in Fischer's Ragwort Caused by Didymella ligulariae

  • Gyo-Bin Lee;Hong-Sik Shim;Weon-Dae Cho;Wan-Gyu Kim
    • 식물병연구
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    • 제29권1호
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    • pp.60-63
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    • 2023
  • During disease surveys from 2019 to 2021, the authors frequently encountered leaf spot symptoms on Fischer's ragwort plants growing at fields at six locations of Gangwon Province, Korea. The symptoms displayed brown to dark brown, circular or irregular spots on the plant leaves. The disease surveys at the six locations revealed 1-90% of diseased leaves of the plants. Phoma sp. was dominantly isolated from the diseased leaf lesions. Seven single-spore isolates of the fungus were selected and identified as Didymella ligulariae by investigation of their cultural, morphological, and molecular characteristics. Artificial inoculation test to Fischer's ragwort leaves was conducted with three isolates of D. ligulariae. The inoculation test revealed that the tested isolates cause leaf spot symptoms in the plants similar to the natural ones. The fungal pathogen has never been reported to cause leaf spot in Fischer's ragwort. Leaf spot of Fischer's ragwort caused by D. ligulariae is first reported in this study.

Damping-off of Fischer's Ragwort Caused by Rhizoctonia solani AG-2-2 (IIIB)

  • Moon, Youn-Gi;Park, Ki-Jin;Kim, Wan-Gyu
    • 한국균학회지
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    • 제49권3호
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    • pp.413-416
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    • 2021
  • In July 2019, damping-off symptoms of young Fischer's ragwort (Ligularia fischeri) plants were observed in four vinyl greenhouses of a farmer located in Taebaek, Gangwon Province, Korea. This disease occurred in 20-30% of plants in the vinyl greenhouses investigated. Nine isolates of Rhizoctonia sp. were obtained from the diseased plants. All the isolates were identified as Rhizoctonia solani AG-2-2 (IIIB), based on morphological, cultural characteristics, and anastomosis test. Three isolates were used for artificial inoculation test on Fischer's ragwort. Pathogenicity of these isolates was confirmed on the plants with the inoculation tests. Damping-off symptoms observed on the inoculated plants were similar to those observed in the diseased plants in the vinyl greenhouses. This is the first report of R. solani AG-2-2 (IIIB) being the causative agent in damping-off in Fischer's ragwort.

Effect of Blanching on Dietary Fiber and Free Sugar Content of Vegetables

  • Rheeno Lee;YongSuk Kim
    • 한국식품위생안전성학회지
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    • 제38권3호
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    • pp.164-169
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    • 2023
  • 채소는 여러 건강상의 이점을 주는 식이섬유를 다량 함유하고 있다. 채소는 국내에서 다양한 형태로 섭취되고 있으며, 특히 생으로 먹거나 나물의 형태로 가장 많이 섭취되고 있다. 나물은 여러 조리 방법이 있는데, 가장 흔한 방법은 데치고 무치는 형식이다. 한국에서 나물로 흔히 섭취되는 국내산 참나물, 깻잎, 곰취, 우엉, 마늘쫑을 데친 후, 데친 채소와 생 채소를 한국 식품공전에 따라서 식이섬유와 유리당을 분석하고 비교하였다. 참나물, 우엉뿌리와 깻잎은 데친 후에 총 식이섬유가 감소하였으나, 곰취와 마늘쫑은 각각 6.09±0.49에서 6.43±0.01 g/100 g 과 4.52±0.35 에서 5.09±0.04 g/100 g으로 증가하였다. 유리당 분석 결과, 깻잎을 제외한 채소들에서 sucrose, glucose와 fructose가 검출되었으며, 깻잎은 sucrose가 검출되지 않았다. 분석한 채소들 중에서 sucrose 함량이 가장 높은 채소는 우엉 뿌리 (1.71±0.07 g/100 g) 였으며, glucose와 fructose는 각각 1.65±0.02 와1.73±0.02 g/100 g로 마늘쫑이 가장 높게 나타났다. 채소를 데친 후, 곰취 (0.10±0.01에서 0.14±0.01 g/100 g)와 마늘쫑 (0.76±0.00 에서0.83±0.01 g/100 g)에 함유된 sucrose를 제외한 다른 유리당 함량은 전부 감소하였다. 이 연구를 통해 채소를 데치면 채소에 함유된 유리당과 식이섬유의 함량이 증가하거나 감소할 수 있다는 것을 나타낼 수 있다. 또한, 이러한 영양 정보를 통해 소비자들에게 어떠한 조리 상태의 채소를 섭취할지 선택할 때에 도움을 줄 수 있을 것이다.