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최근 문제시 되는 수박 과일썩음병에 대한 방제효과 분석
백창기(Chang-Gi Back),이성찬(Sung-Chan Lee),박미정(Mi-Jeoung Park),한경숙(Kyung-Sook Han),김홍기(Hong-Ki Kim),이윤수(Yoon-Su Lee),박종한(Jong-Han Park) 한국농약과학회 2016 농약과학회지 Vol.20 No.1
Bacterial fruit blotch (BFB) caused by Acidovorax avenae subsp. citrulli is defective disease to watermelon cultivated areas. To control of BFB, we investigated control efficiency to use commercial antibacterial pesticides. Growth inhibition zone on medium were formed as oxolinic acid WP and oxytetracycline WP. Control efficacy of four anti-bacterial pesticides on seed and seedling stage were performed. As a results, oxytetracyclin WP is shown over 90% control efficiency on seed and acibenzolar-S-methyl + mancozeb WP shown over 90% control efficiency on seedling stage Hot-water treatment method could be possible to reduced infection rate on seed. The conditions of hot-water treatments are 50~55oC on 20~30 minutes. These results suggested that the methods were helpful watermelon seedling nursery to control of the bacterial fruit blotch by A. avenae subsp. citrulli.
우리나라에 발생하는 잿빛곰팡이병균 Botrytis cinerea의 분자계통학적 유연관계
백창기 ( Chang Gi Back ),이승열 ( Seung Yeol Lee ),정희영 ( Hee Young Jung ) 한국균학회 2014 Mycobiology Vol.42 No.2
Several isolates were collected from apple, pepper, strawberry, cucumber and tomato having typical gray mold symptoms. All the isolates were identified as Botrytis cinerea by using morphological characteristics and PCR-RFLP method. It was difficult to analyze the phylogenetic relationship of these isolates by using ITS region, HSP60 and G3PDH because these genes were highly homologous in their nucleotide in inter-species of B. cinerea and intra-species of genus Botrytis. However, phylogenetic analysis using combined sequences (RPB2, HSP60 and G3PDH genes) clearly showed that all isolate of B. cinerea were different from Botrytis spp. Furthermore, it was also confirmed that strawberry isolate was distantly related to apple, pepper, cucumber and tomato isolates that were closely related to each other in nucleotide level.
총설 : 사과나무를 가해하는 한국산 갈색무늬병균의 생물학적 특성
백창기 ( Chang Gi Back ),정희영 ( Hee Young Jung ) 한국균학회 2014 韓國菌學會誌 Vol.42 No.3
Apple blotch is a major apple disease and recently it causes critical economic losses in apple orchards in Korea. In this review, we described the history of apple blotch researches, ecology and life cycle of Marssonina coronaria, cultural and molecular characteristics and simple isolation method as well. Furthermore, characteristic of apple blotch like symptoms, its cause still unknown, occurs frequently in cv. “Fuji” was described in detail.
양파 노균병균 Peronospora destructor의 분자계통학적 유연관계 분석과 PCR 검출기술 개발
백창기 ( Chang-gi Back ),황선경 ( Sun-kyung Hwang ),박미정 ( Mi Jeong Park ),권영석 ( Young-seok Kwon ),정희영 ( Hee-young Jung ),박종한 ( Jong-han Park ) 한국균학회 2017 韓國菌學會誌 Vol.45 No.4
Onion downy mildew, caused by Peronospora destructor, is a major disease in onion cultivation areas in Korea. The causal fungi were collected and analyzed based on sequence similarity and molecular phylogenetic relationships of multi-gene sequences, including the internal transcribed spacer (ITS) region. All isolates from Changnyeong-gun, Hamyang-gun, and Hapcheon-gun in Gyeongnam province, and Muan-gun, Haenam-gun, and Sinan-gun in Jeonnam province were identical in the four types of gene sequences, indicating they were genetically the same strains. In this study, a PCR method was developed based on the ITS gene sequences to amplify the specific DNA fragment for P. destructor only. The detection limit of was total genomic DNA of the P. destructor and the plant 0.7 ng/μL. Therefore, the developed PCR method could be used to detect P. destructor effectively from symptomless onion leaves.
국화에 발생하는 반쪽시들음병균 Verticillium dahliae 검출용 등온 증폭법 개발
백창기 ( Chang-gi Back ),박미정 ( Mi-jeong Park ),한경숙 ( Kyung-sook Han ),박종한 ( Jong-han Park ) 한국균학회 2019 韓國菌學會誌 Vol.47 No.4
Verticillium wilt disease is caused by a fungal plant pathogen Verticillium dahliae, which attacks commercial crops such as chrysanthemum. The conventional methods so far used to identify this fungal pathogen require high expertise and are time-consuming. Therefore, in this study, we developed an assay for the rapid and specific detection of V. dahliae infection using loop-mediated isothermal amplification (LAMP) method. For this assay, four primers for LAMP were designed for targeting cellulose-growth-specific protein partial mRNA gene in Verticillium dahliae. Under standard condition, the optimum reaction temperature for amplification is around 60 ℃ within 60 minutes. This LAMP assay was designed to amplify only present in V. dahliae. When this LAMP assay applied to the DNAs for four other soil-borne fungi and host plants, no amplification was detected. Therefore, this LAMP assay we developed for V. dahliae is expected to do detection at the early stage of its infection. The fast and reliable detection method will allow us to develop effective management system to monitor and control infection of this pathogen in chrysanthemum plant.
가뭄저항성 GM벼(Agb0103)와 non-GM 일미벼 간 표면미생물의 변화 및 병 발생 양상 비교
이승열(Seung-Yeol Lee),백창기(Chang-Gi Back),박상규(Sangkyu Park),김경민(SangJae Suh),서상재(Kyung-Min Kim),정희영(Hee-Young Jung) 한국육종학회 2016 한국육종학회지 Vol.48 No.2
In this study, we compared disease incidence rate and phyllosphere microbial community between drought resistance ransgenic rice (Agb0103) and non-transgenic Ilmi (NGM) during 2011-2014 to examine an environmental risk assessment of drought resistance transgenic rice (Agb0103). As the results, major diseases such as sheath blight, brown spot, leaf blast and false nsmut were occurred, however, there were no significant disease incidence rate between Agb0103 and NGM. As the results of counting bacterial and fungal viable cell, the colonies were increased or decreased which affected by environmental conditions, however there were no differences between Agb0103 and NGM. Also unweighted pair-group method with arithmetic averaging(UPGMA) analysis based on polymerase chain reaction with denaturing gel electrophoresis (PCR-DGGE) revealed that DGGE band pattern of bacterial and fungal communities were clustered by each month and there were no differences between Agb0103 and NGM. Furthermore, isolated casual agents causing sheath blight and brown spot were collected from Agb0103 and NGM, and they revealed that each of pathogens were no differences in morphology and pathogenicity. Therefore, our results suggested that Agb0103 showed no differences in disease incidence rate, characteristic of pathogens and phyllosphere community with NGM. In this way, it can be assumed that transgenic rice Agb0103 could not influence phyllosphere microorganism community and environmental conditions.
수박 덩굴쪼김병과 오이 근경썩음병에 대한 살균제의 방제 효과
한유경(You-Kyoung Han),백창기(Chang-Gi Back),박미정(Mi-Jung Park),월터빈두민(Walftor bin Dumin),박종한(Jong-Han Park),배영석(Yeoung-Seuk Bae) 한국농약과학회 2021 농약과학회지 Vol.25 No.4
Fusarium wilt and crown and foot rot caused by Fusarium oxysporum and F. solani can result in serious economic losses on several cucurbitaceous crops, such as watermelon and cucumber in Korea. These diseases associated with soil-borne pathogens mainly induce wilting symptoms. In this study, 108 chemical pesticides for controlling Fusarium wilt and crown and foot rot examined in vitro. Meanwhile, in watermelon and cucumber seedling test, carbendazim+kasukamycin and prochlorazmanganese showed a highly control activity in two species of Fusarium. However, in the field test, only carbendazim+kasukamycin had a high control effect crown and foot rot on cucumber. As a results, carbendazim+kasukamycin WP is shown over 90% control efficiency in the field test. Based on the results, it was suggested that it would be better to use carbendazim+kasukamycin WP to control cucumber crown and foot rot in the fields.