• The Plant Pathology Journal
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• 제40권1호
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• pp.1-15
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• 2024

The aim of this study was to isolate biocontrol bacteria that could antagonize brown rot of Dendrocalamus latiflorus, optimize the culture conditions, and develop an effective biocontrol preparation for brown rot of D. latiflorus. This study isolated a bacterium with an antagonistic effect on bamboo brown rot from healthy D. latiflorus rhizosphere soil. Morphology, molecular biology, and physiological biochemistry methods identified it as Bacillus siamensis. The following culturing media and conditions improved the inhibition effect of B. siamensis: the best culturing media were 2% sucrose, 1.5% yeast extract, and 0.7% potassium chloride; the optimal culturing time, temperature, pH, and inoculation amount were 48 h, 30℃, 6, and 20%. The optimum formula of the applying bacterial suspension was 14% sodium dodecyl benzene sulfonate emulsifier, 4% Na₂HPO₄·2H₂O, 0.3% hydroxypropyl methylcellulose thickener, and 20% B. siamensis. The pot experiment results showed the control effect of applying bacterial suspension, diluted 1,000 times is still better than that of 24% fenbuconazole suspension. The applying bacterial suspension enables reliable control of brown rot in D. latiflorus.

• 한국식물병리학회지
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• 제10권4호
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• pp.333-335
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• 1994

In 1991, the leaves and roots brown rot disease of scarlet kafir lily were found in Taejon and Seoul. The symptoms were appeared as dark-brown and water soaked on leaves. The discolored area of the leaves become halo. The roots revealed blight gray and water soaked. The pathogenic bacteria were isolated from the diseased leaves of the scarlet kafir lily were identified as Erwinia cypripedii on the bais of bacterial characteristics. E. cypripedii is first described bacteria which cause the disease on scarlet kafir lily in Korea. Therefore, we would like to propose to the name of scarlet kafir lily disease caused by E. cypripedii as“bacterial brown-rot of scarlet kafir lily”hereafter.

• 한국식물병리학회지
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• 제10권4호
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• pp.336-338
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• 1994

In 1991, the leaf brown spot of ivy-aureus (Scindapsus aureus) was found in Taejon and Seoul, Korea. The symptoms were appeared as dark-brown spots. The lesions were often surrounded by yellowish halos. These spots were enlarged to circular or elliptical in shape and dark-brown to black in color with slightly elevated in margin and sunken in center. The pathogenic bacteria were isolated from the diseased leaf of ivy-aureus were identified as Erwinia chrysanthemi on the basis of bacterial characteristics therefore, we would like to propose to the name of ivy-aureus disease caused by E. chrysanthemi as“bacterial brown rot of ivy-aureus”hereafter.

• 식물병연구
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• 제6권1호
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• pp.15-18
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• 2000

1998년 대전의 비닐하우스에서 재배중인 칼란코에의 잎에 세균병이발생하였다. 이들 병반은 수침상 병반이 나타나고 병반진전과 함께 무름증상을 보였다. 이들로부터 분리한 병원세균을 침접종한 결과 자연병징과 같은 병반을 형성하였다. 병원세균의 세균학적 특성을 조사한 결과 E. herhicola로 동정되었다. 국내에서는 아직 칼란코에 (Kalanchoe blossfeldiana)의 병원세균으로 E. herbicola가 보고되지 않았다. 따라서 이를 E. herbicola에 의한 \"칼란코에의 세균성 무름병\"으로 명명할 것을 제안한다.할 것을 제안한다.

• 식물병과 농업
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• 제5권2호
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• pp.111-114
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• 1999

A bacterial disease of rice plant that rotted the sheath to brown was found in rice plants at Tanbuk Uisong Kyungbuk in June 1999, When the bacterial isolates from the diseased rice plants were inoculated to health plant by the artificial needle prick method the same symptoms were examined. According to its characteristics and pathogenicity on the his plant the causal bacterium was identified as Burkholderia glumae which is known as the pathogen of bacterial grain rot of rice.

• 한국잠사곤충학회지
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• 제37권1호
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• pp.86-91
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• 1995

축엽세균병으로 알려진 피해뽕나무에서 진균인 Fusarium spp. 균이 분리되어 이를 구명하고 그 피해정도를 조사한 결과 1. 신소썩음증상은 세로로 긴 갈색의 병무늬가 시간이 경과할 수록 암갈색으로 변하고 흰곰팡이가 생기며, 축엽세균병증상은 잎이 말리고 신소에 수침상의 병반과 bacterial ooze가 보인다. 그러나 시간이 경과하면 구분이 어렵다. 2. 신소썩음증상의 피해율은 7.5%, 축엽세균병의 피해율은 4.4%였다. 3. Fusarium spp. 균의 분리는 신소썩음증상에서 높았고, Pseudomonas균의 분리는 축엽세균병 증상에서 많았다. 또한 병원성도 같은 경향을 보였다. 4. 수원 등 3지역 모두에서 부위별 병원성 Fusarium spp. 균의 분리율은 병반에서 30cm 부위에서 보다 병진전부위에서 더 높았다. 5. 수원 등 3지역 모두에서 개량뽕의 신소썩음증상 피해가 가장 많았다. 그러나 청올뽕의 신소썩음증상 피해는 조사 품종중에 가장 적었다.

• 한국식물병리학회지
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• 제13권1호
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• pp.13-17
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• 1997

A causal agent of bacterial soft rot occurring in soybean sprout cultivation in Korea was isolated and identified, and its incidence in several sprout-soybean cultivars was examined. Infected soybean seeds became light brown and whitish, and could not germinate until 3 days after seeding, accompanying rotting of soybean seeds and sprouts. The causal organism isolated from the rotten seeds and sprouts was identified as Erwinia carotovora subsp. carotovora on the basis of its pathogenicity, morphological and physiological characteristics and the results of the Biolog GN microplate test program. The bacterial soft rot by E. c. subsp. carotovora was firstly described in soybean sprout in Korea, and we name it“the bacterial soft rot of soybean sprout”. The disease occurred more frequently in Nam-hae and Fu-reun sprout-soybean cultivars than in Eun-ha, So-baek, and Ik-san cultivars.

• The Plant Pathology Journal
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• 제18권1호
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• pp.54-55
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• 2002

Soaked black rot symptom was observed on the stem of Angelica acutiloba from July to August 2000 at Kumsan, Chungnam in Korea. This disease usually occurred under humid and high temperature conditions. The lesions on the stem appeared as soft rot with brown elliptical spots, which developed into large black spots at a later stage. When the bacterial isolates from the diseased plants were inoculated onto healthy plants by artificial needle prick method, symptoms similar to that observed in the fields developed. According to the cultural characteristics and pathogenicity of the isolates on the host plant the causal bacterium was identified as Xanthomonas campestris. This study proposed that the disease be named "bacterial black stem rot of A. acutiloba"loba".

• 한국식물병리학회지
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• 제11권3호
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• pp.224-229
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• 1995

Occurrence and incidences of major diseases of peach (Prunus persicae pv. vulgaris), leaf curl caused by Taphrina deformans, bacterial shot hole caused by Xanthomonas campestris pv. pruni, brown rot caused by Monilinia fructicola, and anthracnose caused by Glomerella cingulata in peach orchards in Cheongdo and Kyungsan areas of Gyeongbuk province, Korea, were investigated for four years from 1990 to 1993. In leaf curl and bacterial shot hole which mainly occurred on leaves, frist disease occurrences were dated from late April to early May. The maximum leaf curl incidence was dated in mid May, while dates of the maximum bacterial shot hole incidence varied from mid May to mid August depending on the years surveyed. In brown rot and anthracnose on fruit, the first disease occurrence dates ranged from early June to early August; however, the maximum disease incidences for both were invariably dated in late August. The disease incidences on the dates of the maximum incidences differed year by year, and the averages for the 4 years were 13.2%, 10.5%, 10.9% and 3.8% for leaf curl, bacterial shot hole, brown rot and anthracnose, respectively. Especially in the leaf curl disease, the first disease occurrence dates and the maximum disease incidences matched with the amounts of precipitation of rain up to April, suggesting that the disease occurrence may be related to the precipitation during the early season. The occurrence of leaf curl was somewhat higher in cultivar“Baekmi”than other cultivars. All of the major disease occurred more in hilly orchards than in plain ones.

• The Plant Pathology Journal
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• 제19권1호
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• pp.43-45
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• 2003

Soft rot symptom was observed on lily bulb in the fields and at a low temperature storage house from 1999 to 2000 in Korea. The small dark-brown lesion appeared on the bulb, and enlarged and developed into the inner scales of the bulb. The bulb became water soaked and gave out unpleasant odor. Two different pathogenic bacteria were isolated from infected tissues. The causal bacteria were identified as Pectobacterium carotovorum subsp. carotovorum (Erwinia carotovora subsp. carotovora) and Pseudomonas marginalis based on bacteriological characteristics. Pathogenicity of the bacteria was proven by Koch's postulations. This is the first report of bacterial soft rot of lily bulb in Korea caused by the two bacteria.