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배 검은별무늬병에 대한 Fluxapyroxad/Pyraclostrobin 합제의 방제 효과
민광현(Kwang-Hyun Min),유정필(Jeong-Pil Ryu),김주미(Ju-Mi Kim),김선화(Sun-Hwa Kim),임순희(Sun Hee Yim),최장전(Jang Jeon Choi),조백호(Baik Ho Cho),양광열(Kwang-Yeol Yang) 한국농약과학회 2014 농약과학회지 Vol.18 No.4
The mixture of fluxapyroxad plus pyraclostrobin or the 9 time-spray schedule with various fungicides was evaluated for their efficacy in controlling pear scab in field trials. It showed sufficient condition to evaluate the efficacy of fungicides for the control of pear scab since disease incidence of the untreated control plot was 58.4% or 100% on leaves or fruits, respectively. Pear scab on leaves was occurred by 6.3% at treated plot with the mixture of fluxapyroxad plus pyraclostrobin, resulting in the 89.2% of control value. Incidence of the fruit disease was 16.7% at treated plot with the mixture of fluxapyroxad plus pyraclostrobin, showing 83.3% of control value. When the 9 time-spray schedule was tested, pear scab was occurred by 5% or 13.3% on leaves or fruits, respectively. Their control values were the 91.4% on leaves or 86.7% on fruits. Although the 9 time-spray schedule showed slightly lower disease incidence than the mixture of fluxapyroxad plus pyraclostrobin, but there is no statistically significant difference. These results suggest that the mixture of fluxapyroxad plus pyraclostrobin can control effectively the pear scab.
단보 : 석회유황합제가 배나무 낙엽의 진균 다양성 변화에 미치는 영향
민광현 ( Kwang Hyun Min ),송장훈 ( Jang Hoon Song ),조백호 ( Baik Ho Cho ),양광열 ( Kwang Yeol Yang ) 한국균학회 2015 韓國菌學會誌 Vol.43 No.4
This study was conducted to examine changes in the fungal community on fallen leaves of pear by treatment with lime sulfur. Although the lime sulfur could reduce the primary inoculum of several pathogens on spring season, the effect of lime sulfur has not been well determined scientifically. Fallen leaves infected by pear diseases in pear orchards in Naju were collected and treated with lime sulfur or water as a control. To determine the fungal diversity from each treatment, rDNA internal transcribed spacer (ITS) regions were analyzed after extraction of fungal genomic DNA from lime sulfur-treated or water-treated fallen leaves, respectively. The most common fungal species were Ascomycota and Basidiomycota in both treated leaves. However, the population dynamics of several fungal species including Alternari sp., Cladosporium sp., and Phomopsis sp., which are known as pear pathogens for skin sooty dapple disease, were quite different from each treated leaves. These results indicated that lime sulfur treatment led to changes of fungal communities on pear fallen leaves and could be applicable as a dormant spray.
은희창(Eun Hee-Chang),정창용(Chung Chang-Yong),민광현(Min Kwang-Hyun) 대한건축학회 2009 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.29 No.1(구조계)
Recently, the subjects related to the structural maintenance to improve the durability of structures. have been focused.. Structures sometimes are damaged for service period or by environmental effects. The damages result in the deterioration of its stiffness. 'This study presents a damage detection method to evaluate the damages based on the variation in the stiffness matrix which is estimated from the measured dynamic or static response data. The validity of the proposed method is illustrated in the application and in the experiment.