• 식물병연구
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• 제22권2호
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• pp.107-110
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• 2016

In October 2014, an occurrence of gray mold was observed on young fruits of sponge gourd (Luffa cylindrica) in Sachunmun, Gangneung, South Korea. Symptoms included abundant mycelia growth with gray conidia on young fruits and finally rotting the fruits. The fungus was isolated from symptomatic fruits and its pathogenicity was confirmed. Based on the morphological features and sequence analysis of ITS-5.8S rDNA, G3PDH, HSP60, and RPB2 genes, the pathogen was identified as Botrytis cinerea Pers. This is the first report of gray mold caused by B. cinerea on L. cylindrica in Korea.

• Journal of the Korean Wood Science and Technology
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• 제35권2호
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• pp.79-84
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• 2007

Surface mold fungi growing on CCA-treated wood could be inhibited effectively by the incorporation of moldicide into treating solution. In this study, moldicides compatible with the CCA solutions from various commercial moldicides were screened, and then their optimum concentrations for controlling surface mold on CCA-treated radiata pine sapwood were examined through both the laboratory and the field trials. Among nine commercial moldicdes tested, two substituted isothiazolinones, moldicide A containing 2-n-octyl-4-isothiazoline-3-one and moldicide B containing 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one, were chemically compatible with CCA solution. The optimum concentration to be incorporated into 2% CCA treating solution was determined to be 0.001% for moldicide A and 0.003% for moldicide B.

• 한국산림과학회지
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• 제105권1호
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• pp.78-85
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• 2016

본 연구는 수요가 증가되고 있는 산채인 갯기름나물을 대상으로 임간재배지 내 차광과 부엽토가 갯기름나물의 생장 및 광합성 특성에 미치는 영향을 조사하여 보다 고품질의 갯기름나물을 생산하는 것뿐만 아니라 생산량 증대 및 친환경 재배기술 개발에 이바지하고자 하였다. 실험은 전광 및 35%, 50%, 75% 차광으로 총 4차광처리와 부엽토처리(대조구, 침엽부엽토, 활엽부엽토)를 하였다. 초장, 줄기직경, 근원직경, 줄기수, 건중량은 전광 내 활엽부엽토에서 가장 높았으며, 엽면적, 엽장, 엽폭은 35% 차광 내 활엽부엽토에서 가장 높았다. 광합성, 기공전도도, 증산율, 수분이용효율은 전광 내 활엽부엽토에서 가장 높았다. 특히, 광합성률은 모든 차광에서 활엽부엽토가 높게 조사되었으며, 차광률이 높아질수록 낮아지는 경향을 보였다. 따라서 갯기름나물을 친환경적으로 재배하기 위해서는 임간재배에서 35% 차광(상대광도 51.1%) 후 활엽부엽토를 이용하는 것이 가장 좋은 생장을 보여 생산량 증대와 고품질 갯기름나물의 생산에 가장 효과적일 것으로 판단된다.

• 한국환경복원기술학회지
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• 제8권6호
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• pp.13-20
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• 2005

본 연구는 자생지환경에서 배합토에 따른 더부살이고사리의 생육을 살펴봄으로써 적정한 생육환경을 구명함은 물론, 실내조경용 소재로 활용성을 높이기 위해 수행하였으며 그 결과는 다음과 같다. 1. 더부살이고사리는 비침상조건보다 침상조건에서 생육이 좋았으며 배합토에 있어서는 밭흙 : 마사토 : 부엽토처리구가 마사토 : 부엽토처리구나 부엽토 단용처리구보다 초장, 소엽장, 소엽폭, 엽병, 관상가치가 높았다. 2. 엽체생중과 엽건조중은 전반적으로 침상조건보다는 비침상조건에서 높았으며 침상조건에서의 엽생체중과 엽건조중은 밭흙 : 마사토 : 부엽토처리구가 다른 배합토에 비해 높았다. 3. 포자엽수는 비침상보다 침상조건에서는 증가하는 경향을 나타내었으며 마사토 : 부엽토처리구가 밭흙 : 마사토 : 부엽토처리구나 부엽토 단용처리구보다 많았다. 4. 생리활성의 경우 기공전도도, $CO_2$이용효율은 밭흙 : 마사토 : 부엽토처리구> 마사토 : 부엽토처리구> 부엽토 단용처리구 순으로 되었으나 광합성률, $CO_2$흡수율, 수분이용효율은 부엽토 단용이 다른 두가지 배합토보다 높았다.

• 농업과학연구
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• 제47권4호
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• pp.1071-1081
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• 2020

Essential oils (EOs) have been shown to be plant-extracted antimicrobial agents. However, there are limited studies investigating the efficacy of EOs against pathogens. Among them, tea tree oil (TTO) is extracted from Melaleuca alternifolia, which is also used as an antifungal agent. In this study, the effect of TTO was investigated on the suppression of melon powdery mildew caused by Podosphaera xanthii and tomato leaf mold disease caused by Passalora fulva. Both powdery mildew and leaf mold diseases were significantly suppressed by a spray of TTO. Eighty percent of powdery mildew and 81% of leaf mold disease of the control value were suppressed by 0.5% TTO liquid, when sprayed 3 times every 7 days on the melon and tomato leaves. Inhibition of mycelial growth was also greatly affected by different concentrations of TTO against four different fungal pathogens. Ninety-eight percent of Pseudocercospora fuligena, 97% of P. fulva, 95% of Botrytis cinerea, and 94% of Phytophthora infestans mycelial growth were inhibited by 0.2% to 1.0% of TTO contained in plate media, respectively. However, phytotoxicity in plants by the TTO treatments was revealed when melon and tomato leaves were sprayed with a 1% and 2% concentration of TTO, respectively. Therefore, our findings show that TTO has high antifungal effects against various plant pathogens that occur during crop cultivation. We also suggest that when applying TTO to plant leaves, it is necessary to establish an accurate treatment concentration for different crops.

• 한국균학회지
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• 제26권4호통권87호
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• pp.531-537
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• 1998

자동화 시설내에서 재배되는 팽이버섯에 발생하는 푸른곰팡이병의 발생상황, 병원균 접종시기에 따른 피해정도, 병원균의 배양적 특성 및 팽이버섯 품종별 피해정도 등에 관한 연구를 수행하였다. 팽이버섯 재배시기별 푸른곰팡이병의 발병률을 배양병수(PP병)로 조사한 바, 배양기에 7.7%로 가장 높았으며, 그후 각 재배단계별로 약간씩 증가하여 수확기까지는 14.9%를 나타냈다. 접종시기에 따른 피해정도는 배양기에 접종시 100%의 감염률을 나타냈으며, 피해정도로 구분하면 +++(40% 이상 수량감소)이었고, 발이초기에는 100%의 이병률을 나타냈지만 피해정도는 감소하여 ++($10{\sim}39%$ 수량감소)를 나타냈으며, 발이 10일후에는 34.4%의 이병률과 피해도는 10% 이하로 푸른곰팡이병이 팽이버섯 발병에 끼치는 영향이 매우 컸다. 팽이버섯에 푸른곰팡이병을 일으키는 병원균은 Trichoderma pseudokoningii로 동정되고, 이 균은 $25^{\circ}C$에서 균사생육이 왕성하며, 팽이버섯 균사보다 2.6배의 빠른 균사생장을 나타냈다. PDA배양시 균총의 색은 황록색을 띄며, phialospore는 한 개의 세포로 레몬형, 표면은 매끈하였고, 크기는 $1.3{\sim}3.0{\times}1.0{\sim}2.5\;{\mu}m$였다. phialides는 볼링핀과 유사한 $2{\sim}3$개가 뭉쳐서 분생자병에 붙어있으며, 크기는 $3.2{\sim}9.2{\times}2.0{\sim}5.6\;{\mu}m$이었다. 계통에 따른 푸른곰팡이병 피해도는 팽이버섯 5개 계통중 FV 4-1계통이 다른 계통보다 교차생장률이 낮고 T. psedokoningii에 의한 생장억제 정도가 낮았다.

• 대한안전경영과학회지
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• 제16권4호
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• pp.331-341
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• 2014

Internet of Thing(IoT), which is recently talked about with the development of information and communication technology, provides big data to all nodes such as companies and homes, means of transportation etc. by connecting all things with all people through the integrated global network and connecting all actual aspects of economic and social life with Internet of Thing through sensor and software. Defining Internet of Thing, it plays the role of a connector of providing various information required for the decision-making of companies in the cloud computing environment for the Insight usage by collecting and storing Raw Data of the production site through the sensor network and extracting big data in which data is accumulated and Insight through this. In addition, as the industry showing the largest linkage with other root industries among root industries, the mold industry is the core technology for controlling the quality and performance of the final product and realizing the commercialization of new industry such as new growth power industry etc. Recently, awareness on the mold industry is changing from the structure of being labor-intensive, relying on the experience of production workers and repeating modification without the concept of cost to technology-intensive, digitization, high intellectualization due to technology combination according to IT convergence. This study, therefore, is to provide a golden opportunity to increase the direct and indirect expected effects in poor management activities of small businesses by actually implementing and managing the entire process of mold life cycle to information system from mold planning to mass production and preservation by building SME(small and medium-sized enterprises)-type mold life cycle management information system in the cloud computing environment and applying it to the production site.

• The Plant Pathology Journal
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• 제27권3호
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• pp.257-265
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• 2011

During 2002-2008 in Korea, 455 extracts from myxobacteria consisting of 318 cellulolytic and 137 bacteriolytic myxobacteria were isolated, which were then screened for antifungal activity against the phytopathogens Botrytis cinerea, Colletotrichum acutatum, Penicillium sp., Pyricularia grisea, and Phytophthora capsici. 204 isolates had antifungal activity, causing both a clear zone due to blocked spore germination and inhibition of mycelial growth; most (199) were from cellulolytic (Sorangium cellulosum) and only five were from bacteriolytic myxobacteria. B. cinerea, the best controlled among the five tested pathogens, had a unique group of antifungal isolates of myxobacterial extracts compared to the other pathogens' groups. Among seventy-nine bioactive myxobacteria, four isolates, KYC 3130, KYC 3247, KYC 3248 and KYC 3270, were selected and all were cellulolytic. Liquid culture filtrates of these four myxobacteria were applied to tomato, cherry tomato, strawberry, and kiwi fruits 5 h before inoculation with gray mold conidia; then the treated fruits were placed in an airtight container and the experiment was repeated six to eight times. Incidence (%) of gray mold on fruit of the infected control treatment was 84-98%, whereas it was only 5-21% after the KYC 3270 treatment. After KYC 3270 treatment of the four fruits, mold control was 79-95%, which was highest among the filtrates and statistically the same as treatment with fludioxonil, a registered chemical against gray mold of stored fruits.

• The Plant Pathology Journal
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• 제21권1호
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• pp.59-63
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• 2005

Bacillus subtilis S1-0210 was selected as a biological agent against Botrytis cinerea in strawberry. The isolate inhibited mycelial growth of B. cinerea in vitro tests. A wettable powder formulation of B. subtilis S1-0210 significantly reduced infection rates with lower than 5%, compared with higher than 70% of infection rates in untreated control. The formulation showed 85 to 89% control efficacies of gray mold incidences on fruits of strawberry in pots. Pre-treatment of the agent was more effective in controlling gray mold on fruits and leaves than post-treatment at the early stage of disease development. The formulation also showed 70% control efficacy of gray mold incidence on fruits of strawberry in a field trial. The results indicate that B. subtilis S1-0210 in the wettable powder formulation may be a potential biocontrol agent to control gray mold on strawberry.

• 한국표면공학회지
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• 제52권6호
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• pp.310-315
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• 2019

The use of a silicon carbide (SiC)-based composite ceramic layer for the mold of a curved cover glass was demonstrated. The stress of SiC/VDR/graphite-based mold structure was evaluated via finite element analysis. The results revealed that the maximum tensile stress primarly occured at the edge region. Moreover, the stress can be reduced by employing a relatively thick SiC coating layer and, therefore, layers of various thicknesses were deposited by means of chemical vapor deposition. During growth of the layer, the orientation of the facets comprising the SiC grain became dominant with additional intense SiC(220) and SiC(004). However, the roughness of the SiC layer increased with increasing thickness of the layer and. Hence, the thickness of the SiC layer needs to be adjusted by values lower than the tolerance band of the curved cover glass mold.