• The Plant Pathology Journal
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• 제37권3호
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• pp.205-214
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• 2021

The use of the supernatant from a Bacillus subtilis culture mixed with sodium bicarbonate was explored as a means of controlling stem brown spot disease in dragon fruit plants. In in vitro experiments, the B. subtilis supernatant used with sodium bicarbonate showed a strong inhibition effect on the growth of the fungus, Neoscytalidium dimidiatum, the agent causing stem brown spot disease and was notably effective in preventing fungal invasion of dragon fruit plant. This combination not only directly suppressed the growth of N. dimidiatum, but also indirectly affected the development of the disease by eliciting the dragon-fruit plant's defense response. Substantial levels of the pathogenesis-related proteins, chitinase and glucanase, and the phenylpropanoid biosynthetic pathway enzymes, peroxidase and phenyl alanine ammonia-lyase, were triggered. Significant lignin deposition was also detected in treated cladodes of injured dragon fruit plants in in vivo experiments. In summary, B. subtilis supernatant combined with sodium bicarbonate protected dragon fruit plant loss through stem brown spot disease during plant development in the field through pathogenic fungal inhibition and the induction of defense response mechanisms.

• 한국식물병리학회지
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• 제14권6호
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• pp.676-681
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• 1998

Disease incidence of Codonopsis lanceolata was surveyed at the major cultivating fields in Chonbuk province in 1996 to 1997. The main diseases of Codonopsis lanceolata were ovserved as leaf spot caused by Septoria codonopsis, anthracnose by Glomerella cingulata, brown leaf spot by Cercospora sp., rust by Coleosporium koreanum, powdery mildew by Erysiphe sp., Fusarium wilt caused by Fusarium oxyporum, and white root rot by Sclerotium rolfsii. Anthracnose, leaf spot and brown leaf spot occurred severely on leaves from early July to late August. They were caused early fallen leaves. Fusarium wilt and white root rot occurred severely on stem and below the soil line in late August. They resulted in withering to death or chlorosis and fallen of leaves. Disease incidence of Codonopsis lanceolata was also substantially different in occurrence with a method of cultivation in late growth stage. Fusarium wilt and white root rot were more severe with a method of no support cultivation than those with a method of support cultivation with a stick. Fusarium wilt occurred 48.8% in a method of no support cultivation but 3.1% in a method of support cultivation with a stick. And white root rot occurred 18.9% in a method of no support cultivation but 0.3% in a method of no support cultivation with a stick. Thus, it proved that soil-borne diseases could be controlled support cultivation with a stick.

• 한국식물병리학회지
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• 제10권1호
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• pp.61-63
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• 1994

A brown leaf and stem spot disease of bayonet-grass (Scirpus maritimus) was epidemic in reclaimed paddy fields of Chunbuk province, Korea. A fungal pathogen was repeatedly isolated from the necrotic lesions of the bayonet-grass and identified as Nimbya scirpicola. The pathogen induced disease symptoms only in bayonet-grass but not in 8 other plants tested; Brassica pathogen induced disease symptoms only in bayonet-grass but not in 8 other plants tested; Brassica compestris subsp. napus var. pekinensis, Cucumis sativus, Glycine max, Hordeum vulgare, Lycopersicon esculentum, Oryza sativa, Sesamum indicum and Triticum aestivum. The fungus has potential to be developed as a mycoherbicide.

• The Plant Pathology Journal
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• 제26권1호
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• pp.80-82
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• 2010

A stem spot disease was observed on Gymnocalycium mihanovichii (Korean name: Bimoran), a scion of graftcactus, in major growing areas of Goyang and Eumseong, Korea during 2008 and 2009. Typical symptoms were initial blackish brown lesions produced mainly on areoles and scars of injured stem tissues, gradually becoming large black spots. A causal organism isolate CD2-7A isolated from the infected stems was identified as Alternaria alternata based on its morphological characteristics and confirmed by the DNA sequencing analysis of ITS, glyceraldehydes-3-phosphate dehydrogenase (gpd), and allergen Alt a1 (Alt a 1) genes. Artificial inoculation of the fungal isolate CD2-7A produced the same rot symptoms on the cactus stems, from which the same fungus was isolated and identified. This is the first report of the black spot caused by A. alternata in the grafted cactus.

• The Plant Pathology Journal
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• 제37권4호
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• pp.413-413
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• 2021

• 식물병연구
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• 제11권2호
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• pp.201-203
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• 2005

2004과 2005년 7월 경상남도 진주시 칠암동 남강변에 재배중인 비비추에서 S. rolfsii에 의한 흰비단병이 발생되었다. 병징은 잎자루, 줄기, 지제부위가 수침상으로 물러지고 부패하면서 암갈색으로 되고 시들어 말라 죽는다. 병반부와 지제부위의 토양 표면에 흰색의 곰팡이가 솜털처럼 생기고 갈색의 둥근 균핵을 많이 형성되었다. 감자한천 배지에서 갈색의 둥근 균핵을 많이 형성하였으며 크기는 $1\~3$mm였다. 균사의 폭은 $4\~8{\mu}m$이며, 균사생육 적온은 $30^{\circ}C$였다. 균사특유의 clamp connection이 관찰되었다. 비비추에서 발생한 병징과 균학적 특징 및 병원성을 검정한 결과, 이 병을 Sclerotium rolfsii Saccardo에 의한 비비추 흰비단병으로 명명하고자 한다.

• 한국육종학회지
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• 제41권4호
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• pp.603-606
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• 2009

Lipoxygenase and Kunitz trypsin inhibitor protein of mature soybean [Glycine max (L.) Merr.] seed are main anti-nutritional factors in soybean seed. A new soybean cultivar, "Gaechuck#1" with the traits of black seed coat, green cotyledon, lipoxygenase2,3 and Kunitz trypsin inhibitor protein free was developed. It was selected from the population derived the cross of "Gyeongsang#1" and C242. Plants of "Gaechuck#1" have a determinate growth habit with purple flowers, brown pubescence, black seed coat, black hilum, oval leaflet shape and brown pods at maturity. Seed protein and oil content on dry weight basis have averaged 39.1% and 16.2%, respectively. It has shown resistant reaction to soybean necrosis, soybean mosaic virus, Cercospora leaf spot and blight, black root rot, pod and stem blight, and soybean pod borer. "Gaechuck#1" matured on 5-10 October with a plant height of 50 cm. The 100-seed weight of "Gaechuck#1" was 23.2g. Yield of "Gaechuck#1" was averaged 2.2 ton/ha from 2005 to 2007.

• 식물병연구
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• 제19권4호
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• pp.300-307
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• 2013

This study was conducted to determine the occurrence of leaf rot and leaf ring spot, caused by Rhizoctonia solani in Chinese cabbage under seedling nursery and cultivation greenhouses. Symptoms of leaf rot and leaf ring spot were found in three Chinese cabbage cultivars, Brassica campestris subsp. pekinensis, 'Ryeokgwang', 'Daetong', and 'CR mat'. In Hwacheon, the disease incidence was 73.8% in the seedling stage of the Chinese cabbage. In Icheon, the symptoms were observed on the upper leaves of the Chinese cabbage cultivar, 'Norangmini' with 20.5% of disease incidence. The symptoms appeared as primary lesions consisting of small, circular necrotic ring spots with gray color, 1.4-3.0 mm in diameter, accompanied by secondary rot lesions with large irregular borders of leaves. The color of mycelial mat of 20 isolates was dark brown and light brown. The average hyphal diameter of all the isolates was within 5.01-11.12 ${\mu}m$. Among the 20 strains isolated from Chinese cabbage, 16 isolates and four isolates anastomosed with the AG-1 (IB) and AG-1 (IC), respectively. Twenty isolates tested were only virulent on foliage parts of Chinese cabbage leaves but were avirulent on stem parts of the plants. Based on the mycological characteristics and pathogenicity test on host plants, the fungus was identified as Rhizoctonia solani.

• 한국육종학회지
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• 제41권4호
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• pp.612-615
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• 2009

Lipoxygenase and Kunitz trypsin inhibitor protein are the main antinutritional factor in mature soybean seed. A new soybean cultivar, "Gaechuck#2" with yellow seed coat, lipoxygenase2,3-free and Kunitz trypsin inhibitor protein-free was developed. It was selected from the population derived from the cross between "Jinpumkong2ho" and C242. Plants of "Gaechuck#2" have determinate growth habit with purple flowers, tawny pubescence, yellow seed coat, yellow hilum, oval leaflet shape and brown pods at maturity. Seed protein and oil content on a dry weight basis were 40.7% and 18.7%, respectively. It has shown a resistant reaction to soybean necrosis, soybean mosaic virus, Cercospora leaf spot and blight, black root rot, pod and stem blight, and soybean pod borer. Gaechuck#2 matured in 4 October with plant height of 54cm and a 100-seed weight of 24.4g. Average Yield of Gaechuck#2 was 230 - 250 kg/10a in 2005 - 2007.

• 한국육종학회지
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• 제49권3호
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• pp.224-229
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• 2017

간식용 대립 땅콩의 선호도가 높음에 따라 단경 대립 다수성 신품종 육성을 위하여 단경 다분지성인 '익산 31호'와 소분지 직립 초형의 대립종인'다광'을 인공교배하여 육성한 '다안'의 주요 특성을 요약하면 다음과 같다. '다안'은 신풍 초형으로 개화기가 '대광'에 비해 1일 늦으나 주경장은 44cm로서 11cm 더 작고 분지수는 13개 정도인 단경 직립 소분지성이다. '다안'은 주당 성숙협수는 34개로서 '대광' 땅콩에 비해 10개 더 적으나, 협실비율(75%), 협당립수(1.93개), 100립중(127g)등 수량구성 요소가 우수한 대립 박피종이다. 병해저항성으로 갈반병은 '대광'과 같이 포장저항성이 있으며 흑반병, 그물무늬병, 흰비단병은 '대광' 보다 양호한 수준이다. '다안'은 단백질이 28.3%, 기름함량이 47.8%이고 지방산비율은 불포화 지방산인 올레산이 43.1%, 리놀산이 40.9%인 특성을 가지고 있다. '다안'은 3년간 4개소 지역적응시험 결과 전국 평균 5.00ton로서 대광땅콩에 비하여 16% 증수되었다. '다안'은 직립성 소분지 초형으로 생육후기 낙엽병류인 흑반병과 그물무늬병 방제가 중요하며 충분한 성숙을 위하여 경기북부와 강원도 산간 고랭지를 제외한 이남 지역에서 적응성이 높은 품종이다.