• Mycobiology
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• 제32권2호
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• pp.98-101
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• 2004

A fruit soft rot caused by Mucor piriformis occurred on sweet persimmon storages in Jinju, Changwon and Gimhae, Gyeongnam province, Korea, 2003. The disease infection usually started from wounding after cracking of fruits. At first, the lesions started with water soaked and rapidly softened and diseased lesion gradually expanded. Colonies on potato dextrose agar at $20^{\circ}C$ were whitish to olivaceous-buff Sporangia were globose, black and $96{\sim}153{\mu}m$ in size. Sporangiophores were $26{\sim}42{\mu}m$ in width. Sporangiospores were ellipsoid and $5.8{\sim}10.6{\times}4.3{\sim}7.6{\mu}m$ in size. Columella was obovoid, cylindrical-ellipsoidal, pyriform, subglobose and $80{\sim}125{\mu}m$ in size. Optimal temperature for mycelial growth was $20^{\circ}C$ on PDA. The causal organism was identified as M. piriformis. This is the first report of fruit soft rot on sweet persimmon caused by M. piriformis in Korea.

• 한국식물병리학회지
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• 제14권6호
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• pp.738-740
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• 1998

Bacterial soft rot was occurred on fruit of pepper that was grown in Chunceon, Kangwon province, Korea. The symptoms began as a small hole at 5 mm diameter, which made injury by a tobacco bud worm (Heliothis assulta). The affected fruit became soft and produced offensive odor. The causal organism was isolated from the diseased fruit and was identified as Erwinia carotovora subsp. carotovora based on the morphological, physiological and biochemical characteristics, and on the results of the Biolog program (Biolog Inc., U. S. A.). E. carotovora subsp. carotovora is the first described bacterium which causes bacterial soft rot on pepper in Korea.

• Mycobiology
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• 제40권3호
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• pp.214-216
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• 2012

Soft rot on banana fruit caused by Rhizopus oryzae was identified for the first time in Korea. Colonies were white to light brown and formed numerous sporangiospores. Optimum temperature for mycelial growth was $30^{\circ}C$. Sporangia were globose and $30{\sim}200{\mu}m$. Sporangiophores were usually straight, $8{\sim}20{\mu}m$, and rhizoids usually in groups of 3~5. Columella were globose to sub-globose and $90{\sim}110{\mu}m$. Sporangiospores were sub-globose or oval and $4{\sim}10{\mu}m$. Based on its mycological characteristics, molecular analysis, and pathogenicity to host plants, this fungus was identified as Rhizopus oryzae Went & Prisen Geerligs. This is the first report of soft rot on banana caused by Rhizopus oryzae in Korea.

• 식물병연구
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• 제10권4호
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• pp.260-267
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• 2004

2001년부터 2003년에 걸쳐 수확 후 과일가게에서 판매되는 참외의 썩음증상으로부터 Fusarium spp.를 분리하였다. 병든 과실들은 균사로 덮여 있었고 결국 물러 썩었다. 병의 시작은 주로 과실이 달렸던 부위, 꽃이 달렸던 부위 그리고 열매 표면에 병이 시작되었다. 병이 진전됨에 따라 물러 썩는 열매의 표면에는 흰색에서 분홍빛의 균사로 덮혔다. 이들 병든 과실로부터 분리된 Fusarium spp.를 기존에 보고된 균학적 내용과 비교하여 동정한 결과 Fusarium equiseti, F. graminearum, F. monliforme, F. proliferatum, F. sambucinum, F. semitectum으로 동정되었다. 이들 균의 병원성을 조사하기 위해 건전한 참외에 인위적으로 만든 상처와 무상처에 접종한 결과 접종 이틀후, 상처 접종 부위에 기중균사가 형성되었고, 병이 진전됨에 따라 물러 썩었다. 비록 참외에서 Fusarium spp.가 야기하는 열매썩음병은 국내에서 이미 보고된 바가 있으나, 이와 관련된 종에 대해서는 보고된 적이 없다. 따라서, 이 연구를 통해 Fusarium spp.에 의한 수확 후 참외의 열매썩음병을 국내에서 처음으로 보고하는 바이다.

• 식물병연구
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• 제6권1호
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• pp.1-5
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• 2000

• Mycobiology
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• 제33권3호
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• pp.163-165
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• 2005

In April 2002 and 2003, soft rot on fruit of eggplant (Solanum melongena) caused by Choanephora cucurbitarum was observed in the experimental fields at Gyeongnam Agricultural Research and Extension Services in Korea. The disease began with water-soaking and dark-green lesions, and then the infected tissues were rapidly rotten. Sporangium was subglobose in shape and sized $40{\sim}130\;{\mu}m$. Monosporous sporangiola were elliptic, fusiform or ovoid, brown in color, and measured as $12{\sim}20\;{\times}\;6{\sim}14\;{\mu}m$. Sporangiospores having three or more appendages were elliptic, fusiform or ovoid in shape, dark brown or brown in color, and sized $14{\sim}20\;{\times}7{\sim}16\;{\mu}m$. The fungus grew well on potato dextrose agar between 15 and $40^{\circ}C$ and its optimum growth temperature was $30^{\circ}C$. Based on morphological characteristics, the causal fungus of the fruit soft rot of eggplant was identified as C. cucurbitarum. This is the first report on the soft rot of S. melongena caused by C. cucurbitarum in Korea.

• 한국균학회지
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• 제30권2호
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• pp.166-169
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• 2002

2002년 진주시 농산물 도매시장에서 Rhizopus stolonifer에 의한 감귤 무름병이 발생하였다. 병징은 처음 과일 껍질 부분이 수침상으로 물러지면서 급속히 진전되어 썩었다. 균사는 처음 흰색에서 연한 갈색으로 되며 검은색의 포자낭을 형성한다. 포자낭병은 처음 무색에서 회색을 나타내며 포자낭을 끝에 만들고 길이는 $900{\sim}4300{\mu}m$였다. 포자낭은 처음에 무색에서 나중에 검은색이고 아구형으로 크기는 $98{\sim}346{\mu}m$이다. 추축은 아구형 또는 타원형으로 직경은 $60{\sim}216{\times}72{\sim}143{\mu}m$이다. 포자낭포자는 담갈색으로 단포이며 구형 또는 타원형으로 크기는 $8{\sim}18.3{\mu}m$였다. 균사생육 적온은 $25^{\circ}C$였다. 이상과 같이 병원균의 균학적 특징과 병원성을 검정한 결과 이병을 R. stolonifer에 의한 감귤 무름병으로 명명할 것을 제안하고자 한다.

• The Plant Pathology Journal
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• 제17권2호
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• pp.110-113
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• 2001

Post-harvest diseases of kiwifruit caused severe damages on the fruits during storage, transportation, marketing and consumption. Phomopsis sp. was reported to be one of the major causal organisms of post-harvest fruit rots of kiwifruit. Symptoms of stem-end rot caused by Phomopsis sp. appeared at the stem-end area of the fruit as it ripened. The brown pubescent skin at the area became soft and lighter in color than the adjacent firm healthy tissues. A watery exudate and white mycelial mats were frequently visible at the stem-end area forming a water-drop stain down the sides on the dry brown healthy skin. When the skin was peeled back, the affected flesh tissue was usually watersoaked, disorganized, soft and lighter green than the healthy tissue. Phomopsis sp. was consistently isolated from the diseased fruits, and its pathogenicity was confirmed by an artificial inoculation test on healthy fruit of kiwifruits. The mycological characteristics of the telemorph state of the fungus produced on potato-dextrose agar were in accordance with those of Diaporthe actinidiae. This is the first report on the occurrence of a telemorph state of D. actinidiae as the causal organism of stem-end rot of kiwifruit in Korea.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2003년도 정기총회 및 추계학술발표회
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• pp.25-27
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• 2003

Since 1993, a total of 50 problematic plant diseases unrecorded in Korea were surveyed in Gyeongnam province. Totally 34 new host plants to corresponding pathogens investigated in this study were 5 fruit trees, 9 vegetables, 12 ornamental plants, 3 industrial crops, and 5 medicinal plants. Among the newly recorded fruit tree diseases, fruit rot of pomegranate caused by Coniella granati and Rhizopus soft rot of peach caused by Rhizopus nigricans damaged severely showing 65.5% and 82.4% infection rate. Among the vegetable diseases, corynespora leaf spot of pepper caused by Corynespora cassiicola and the crown gall of pepper caused by Agrobacterium tumefaciens, powdery mildew of tomato caused by Oidiopsis taurica were the most severe revealing 47.6%, 84.7%, and 54.5% infection rate in heavily infected fields, respectively. In ornamental plants, collar rot of lily caused by Sclerotium rolfsii, gray mold of primula caused by Botrytis cinerea, soot leaf blight of dendrobium caused by Pseudocercospora dendrobium, sclerotinia rot of obedient plant caused by Sclerotinia sclerotiorum showed 32.7 to 64.8% disease incidence. On three industrial plants such as sword bean, broad bean, and cowpea, eight diseases were firstly found in this study. Among the diseases occurring on broad bean, rust caused by Uromyces viciae-fabae and red spot caused by Botrytis fabae were the major limiting factor for the cultivation of the plant showing over 64% infection rate in fields. In medicinal plants, anthracnose of safflower caused by Collectotrichum acutatum was considered the most severe disease on the plant and followed by collar rot caused by Sclerotium rolfsii.(중략)

• 식물병연구
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• 제11권2호
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• pp.204-207
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• 2005

2003년부터 2005년까지 경남 창원시 대산면 북부마을 여주재배 농가에서 Rhizopus stolonifer에 의한 여주 무름병이 발생하였다. 병징은 처음 과실껍질 부분이 수침상으로 물러지면서 빠르게 부패되었다. 균사생육 적온은 $25^{\circ}C$ 내외로 처음 흰색에서 연한 갈색으로 되며 검은색의 포자낭을 많이 형성한다. 포자낭경은 처음 흰색에서 회색을 나타내며 포자낭을 균사 끝에 형성하고 폭은 $15\~30{\mu}m$ 이었다. 포자낭은 처음에 흰색에서 나중에 검은색으로 되었고 모양은 반구형으로 크기는 $90\~180{\mu}m$이었다. 주축의 모양은 반구형으로 크기는 $80\~150{\mu}m$이었다. 포자낭포자는 담갈색으로 단포이며 구형 또는 타원형으로 불규칙한 것이 많으며 크기는 $7\~18{\times}6\~12{\mu}m$이었다. 이상과 같은 병원균의 균학적 및 병원학적 특성조사 결과로 본 병해를 Rhizopus stolonifer (Ehrenberg ex. Fr.) Lind에 의한 여주 무름병으로 명명할 것을 제안한다.