• Research Article

    Non-destructive Methods to Determine Ripening Quality of Intact Muskmelon
    Tilahun, S., M. H. Seo, H. R. Choi, D. S. Park, T. Solomon, C. S. Jeong
    Muskmelons do not exhibit significant external evidence of ripening because of their hard and thick rinds, increasing the likelihood of purchasing an ... + READ MORE
    Muskmelons do not exhibit significant external evidence of ripening because of their hard and thick rinds, increasing the likelihood of purchasing an unripe fruit. In this study, the non-destructive estimation of fruit ripening quality of intact “Honey One” and “Earl’s Talent” muskmelon cultivars was examined. We analyzed the correlation between the major characteristics used for assessing ripening quality (firmness, total soluble solids (TSS), and titratable acidity) and stalk moisture and specific gravity. Moreover, partial least square (PLS) regression analysis was performed for the visible/near-infrared (Vis/NIR) spectroscopy data and reference samples. The correlation coefficients (r) between stalk moisture and flesh firmness were 0.88 and 0.77 for the “Earl’s Talent” and “Honey One” cultivars, respectively. In addition, the specific gravity and flesh firmness of the fruits were negatively correlated; r = -0.65 and r = -0.63 for the “Honey One” and “Earl’s Talent” cultivars, respectively. Moreover, the PLS analysis of the calibration set revealed the determination coefficients (R2) of 0.73 and 0.54 for “Earl’s Talent” and “Honey One”, respectively, for firmness vs. Vis/NIR spectral values. In addition, the PLS analysis of the prediction set showed r2 = 0.51 for “Honey One” and r2 = 0.50 for “Earl’s Talent”. Hence, this study highlighted the possibility of using the status of fruit stalk, specific gravity, and Vis/NIR spectra to predict the ripening quality of muskmelons. However, further studies are necessary to develop more robust non-destructive methods for the estimation of the ripening quality of intact muskmelons. - COLLAPSE
    March 2019
  • Research Article

    Analysis of Pesticide Application in Apple Orchards in Gangwon Province

    강원도 사과 재배지역 농약사용실태 분석

    Park, D. H., J. H. Lee, T. S. Jeong, S. J. Hwang, D. K. Hong, H. S. Won

    박덕환, 이재홍, 정태성, 황세정, 홍대기, 원헌섭

    This study was conducted to analyze trends in the usage of fungicides and insecticides in 132 apple orchards in Gangwon Province, where ... + READ MORE
    This study was conducted to analyze trends in the usage of fungicides and insecticides in 132 apple orchards in Gangwon Province, where the apple cultivation area has recently increase. The number of treatments with both fungicides and insecticides was eight per orchard, indicating that the number of treatments has reduced compared with that 10-20 years ago. The most frequently used fungicides and insecticides were dithianon, tebuconazole, and mancozeb, and spirotetramat, acetamiprid, and chlorantraniliprole WP, respectively. In addition, the cultivators in Gangwon Province are not treated with unregistered pesticides; thus, we assumed that the apple orchards in Gangwon Province might be appropriate in terms of usage of pesticides based on the guide from RDA (Rural Development Administration). We hope to further develop the adapted control strategies using pesticides in apple orchards in Gangwon Province via continuous monitoring. - COLLAPSE
    March 2019
  • Research Article

    Antioxidant Activities of Natural Essential Oils Derived from Korean Endemic Plants

    국내 자생식물로부터 얻어진 천연정유 추출물의 항산화 효과에 대한 연구

    Kim, S. Y., S. M. Kim, S. J. Park

    김소연, 김성문, 박세진

    Oxidative stress, which is induced by free radicals, causes various pathophysiological problems in the body. Natural essential oils derived from aromatic plants ... + READ MORE
    Oxidative stress, which is induced by free radicals, causes various pathophysiological problems in the body. Natural essential oils derived from aromatic plants such as lavender and rosemary are used as additives in foods and cosmetics because of their aroma and antioxidant effects. The purpose of this study was to investigate the antioxidant activity of natural essential oils from Korean endemic plants. Natural essential oils including Mentha piperascens, Teucrium veronicoides, Citrus unshiu Peel, Angelica gigas Nakai, Zingiber officinale Roscoe, Artemisia annua L., Houttuynia cordata Thunb, Dendranthema zawadskii var. latilobum, Chrysanthemum morifolium, and Atractylodes macrocephala Koidz. were extracted by steam distillation extraction method, respectively. 2,2-Diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) methods were performed to measure the free radical scavenging activity of each essential oil. We found that the essential oils from the Asteraceae family including Dendranthema zawadskii var. latilobum and Chrysanthemum morifolium showed more potent antioxidant activity than those from other plants. Our findings suggest that natural essential oils derived from Asteraceae family have free radical scavenging activity, which may be explored in the prevention of health problems. - COLLAPSE
    March 2019
  • Research Article

    A Competitiveness Evaluation of the Wine Industry at Yalu River Valley in China
    Yi, M. Y., S. Lee
    The wine consumption market in China has been growing rapidly in recent years. The ‘Yalu River Valley’ strategy to promote the local ... + READ MORE
    The wine consumption market in China has been growing rapidly in recent years. The ‘Yalu River Valley’ strategy to promote the local wine industry was introduced in 2013 by the Tonghua City government. However, compared to large wine producing areas, wine produced in the Yalu River Valley has a small share of the market. The purpose of this study is to evaluate the competitiveness of the Yalu River Valley wine industry in China. This study used multicriteria decision making technique analytic hierarchy process methodology to identify each factor’s importance degree with three hierarchies and 31 critical factors. The survey was conducted with the help of 48 relevant experts. The results show that production factor condition is the most important category in the priority list, followed by domestic demand condition, structure and rivalry and related industry. This study would be helpful to give a strategy to policy makers for developing small wineries in China. - COLLAPSE
    March 2019
Journal Informaiton Agriculture and Life Sciences Research Institute Journal of Agricultural, Life and Environmental Sciences
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