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RISS 인기검색어
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- 저자 : 권현민(Hyun Min Gwon) (검색결과 2 건)
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Development of Control Agent against Powdery Mildew using Medicinal Crop Extracts
Hyun Min Gwon(권현민) 한국약용작물학회 2021 한국약용작물학회 학술대회논문집 Vol.2021 No.1
Background : This study was carried out to develop a new and environmental-friendly bio-fungicide to control powdery mildew using medicinal crop or its by-product extracts. Methods and Results : The experimental materials were used to 30 medicinal crops to test the effects of natural for powdery mildew control. Dried plants were extracted by 80% methanol over three times for 3 hours using soxhlets extract. The experiments on selecting natural substances were conducted by strawberry leaves infected powdery mildew into distilled water and inoculating 100㎕ of natural extract into powdery mildew spores for six hours to select the first substance to suppress. And then, the selected natural materials were tested in the greenhouse by spraying single or mixture of 50㎖ (1000 times diluted) to each plant of strawberry leaves infected with powdery mildew. Rhus javanica and Cedrela sinensis were finally selected out of 30 kinds of medicinal crops to test the effects of single or mixture application with potassium silicate in order to show a similar control effect as disinfectant. As a result of investigating the single-use treatment effect of SiO2 concentration, 0.5% concentration was the most effective. As a result of processing 0.5% SiO2 and diluted extract, 0.5% SiO2 and 1000 times diluted extracts were the best. Furthermore, application twice after 3 - 4 days from the day applied first, the control effect was better. Conclusion : It was found that the control effect of powdery mildew was more than 75% when processing 0.5% SiO2 and 1000 times diluted extract. Moreover, the control period was about 30 days, which is an environmental-friendly control suitable for the control of powdery mildew during the strawberry harvest season.
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임동현(Dong Hyeon Im),김종혁(Jong Hyuk Kim),권현민(Hyun Min Gwon),노일래(Il Rae Rho) 한국약용작물학회 2021 한국약용작물학회지 Vol.29 No.1
Background: The roots of Codonopsis lanceolata are widely used in natural traditional medicine, and cane be eaten either raw or cooked. This study was conducted to investigate changes in the content of the main components of C. lanceolata roots during different stages of growth. Methods and Results: To determine the changes in the main components of C. lanceolata at different growth stages, we analyzed the composition of six component types (saponins, amino acids, inorganic matter, free sugars, fatty acids, and organic acids) in C. lanceolata roots during three growth periods [dormancy (winter), high growth (spring) and later growth (autumn)]. We accordingly found that the contents of all six assessed component types tended to be high in January during the peroid of dormancy. Conclusions: Our finding that the contents of the main constituents in C. lanceolata roots are high in January during dormancy are consistent with the general practice of harvesting roots during the authmn to winter peroid prior to the period of high growth in spring.
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