• Research Article

    The Effect of High CO2 Treatment and MA Packaging on Asparagus Quality and Shelf Life during Cold Storage
    Wang, L. X., I. L. Choi, J. H. Lee, H. M. Kang
    Oxygen transmission rate (OTR) films of 1,300 and 10,000 cc/m2/day/atm, perforated (P), microperforated (MP), and vacuum (V ... + READ MORE
    Oxygen transmission rate (OTR) films of 1,300 and 10,000 cc/m2/day/atm, perforated (P), microperforated (MP), and vacuum (V) films were investigated for suitability in maintaining the quality and prolonging shelf life of asparagus during cold storage. An additional investigation using 60% (v/v) carbon dioxide treatment (V + 60% CO2) was also performed. All samples lost fresh weight over time, P and V + 60% CO2 had the highest and lowest fresh weight loss rate by the last day. Only 1,300 cc and 10,000 cc OTR films kept the asparagus at a marketable value, the least off-odor was detected in P, and the worst was in V + 60% CO2 in final day. The V + 60% CO2 resulted in lower firmness in asparagus tips, and the V resulted in the lowest firmness in stems. Although, little color changes happened in all treatments, the V + 60% CO2 treatment had greater soluble solids content and hue angle. The highest ethylene concentration was detected in the V film. The CO2 and O2 levels of the 1,300 cc and 10,000 cc OTR treatments were more suitable for asparagus storage. In general, based on the visual quality, 1,300 cc and 10,000 cc OTR films were more effective for asparagus cold storage. To some extent, high CO2 treatment exhibited a positive effect on maintaining internal quality, fresh weight and color of asparagus. - COLLAPSE
    July 2019
  • Research Article

    Effects of ABA Treatment on Fruit Coloration and Characteristics in ‘Paradise’ Grape Cultivar

    ABA 처리가 ‘파라다이스’ 포도의 착색과 과실품질에 미치는 영향

    Lee, M. G., J. Y. Heo, S. M. Park

    이민규, 허재윤, 박성민

    ‘Paradise’, a triploid grape cultivar, needs application of gibberellin acid in order to induce seedless fruit with large size, which can result ... + READ MORE
    ‘Paradise’, a triploid grape cultivar, needs application of gibberellin acid in order to induce seedless fruit with large size, which can result in poor berry coloration under unsuitable growth conditions. Global warming leading to warm climates can be one of major reasons to prohibit production of ‘Paradise’ with high quality. Abscisic acid (ABA) is a well-known plant hormone that is related to the maturation of grape berries, and its application can be useful to avoid the problem of poor berry coloration. Hence, this study was conducted to investigate the effect of ABA application on fruit coloration and characteristics in ‘Paradise’ grape cultivar. ABA-treated berries were characterized by superior coloration compared to control berries. In addition, treatment with high concentration of ABA led to better fruit characteristics which result from early maturation. Therefore, ABA application seems to be an effective method for enhancing the fruit color and quality of ‘Paradise’ grape cultivar. - COLLAPSE
    July 2019
  • Research Article

    Effects of OTR Film Types on the Quality during MA Storage of Lactuca indica L. Baby Leaf Vegetable

    OTR 필름 종류가 왕고들빼기 어린잎 채소의 MA 저장 중 품질에 미치는 영향

    Kang, H. M., I. L. Choi, J. Y. Kim

    강호민, 최인이, 김주영

    This study was conducted to examine the effects of OTR film types on the quality during MA (modified atmosphere) storage of ‘Sheonhyang ... + READ MORE
    This study was conducted to examine the effects of OTR film types on the quality during MA (modified atmosphere) storage of ‘Sheonhyang’ (Lactuca indica L.) baby leaf vegetable harvested at baby leaves size less than 10 cm plant height packed with 50 cc, 1,300 cc, 10,000 cc, 20,000 cc, 40,000 cc, and 80,000 cc/m-2/day-1/atm-1 OTR (oxygen transmission rate) films and MP (micro-perforated) film, and then stored at 8°C for 22 days. Fresh weight loss rate of all OTR film treatments showed a 1.1% until the storage end date, and MP treatment showed a 5.5% until the storage end date. The oxygen concentration in the packaging during storage period was maintained at 19% over in 20,000 cc, 40,000 cc, and 80,000 cc OTR film treatments, and the 50 cc OTR film treatment was maintained 15-16% during storage period. And concentration of the carbon dioxide was showed the highest at 50 cc treatments of 11% at the storage end date, and 1,300 cc, 10,000 cc OTR film treatments to show the levels of 7% and 5%, respectively, and the other OTR film treatment showed a concentration of less than 4%. Micro-perforated film treatment was showed more than 20% of oxygen concentration and less than 0.1% of carbon dioxide concentration at storage end date. Ethylene concentration in the package was maintained 1-4 µL/L-1 in the all treatments during the storage period, and tended to increase rapidly at 17 days of storage. The visual quality was maintained in the 50 cc, 1,300 cc treatments at end of storage date. The chlorophyll content and Hue angle value were surveyed highest at 50 cc and 1,300 cc treatments at the end of storage, and the b* value of yellow color was lowest in 50 cc and 1,300 cc treatments. The DPPH radical scavenging activity decreased with increasing oxygen permeability at the end of storage compared with before storage. Therefore, 1,300 cc OTR film treatment which was most effective for yellowing suppression and maintaining quality during storage is considered to be proper for packaging of ‘Sheonhyang’ (Lactuca indica L.) baby leaf vegetable. - COLLAPSE
    July 2019
  • Research Article

    Antifungal Effect of Plant Extracts on Major Fungal Phytopathogens of Asparagus

    아스파라거스 주요 식물병원성 진균에 대한 식물추출물의 항진균 효과

    Kim, K. S., H. H. Park, B. S. Park, H. Y. Kim, J. H. Han

    김경수, 박현후, 박병성, 김희영, 한준희

    Ten plant extracts were used to select effective organic components against four major asparagus fungal diseases caused by Poitrasia circinans, Botrytis cinerea ... + READ MORE
    Ten plant extracts were used to select effective organic components against four major asparagus fungal diseases caused by Poitrasia circinans, Botrytis cinerea, Fusarium oxysporum, and Stemphylium vesicarium. Primary screening results using the disk diffusion method revealed antifungal effects of the extracts of cloves, mixed extracts of coptis chinesis and rhubarb, and grapefruit seed, bower actinidia, and purple coneflower. The extracts of cloves and grapefruit + Dahlia + chrysanthemum showed about 79.4% and 78.2% inhibition P. circinans growth at low concentrations of 500 ppm, respectively. Clove extracts were the most effective against B. cinerea and F. oxysporum at 500 ppm, with 86.2% and 59.7% reduction in growth, respectively. S. vesicarium was found to be effectively inhibited by about 80% at 500 ppm by all the four plant extracts. The grapefruit seed + bower actinidia + purple coneflower extract reduced P. circinans conidiation by 89.0% at 500 ppm. Clove extract showed an excellent reduction in F. oxysporum conidiation by 94.3% at 500 ppm. These results provide basic data for biologically controlling major fungal diseases of asparagus using plant extracts. - COLLAPSE
    July 2019
  • Research Article

    Integrated Pest Management Strategies for Controlling Onion Thrips of Asparagus in Gangwon Province, Korea

    강원도 아스파라거스 파총채벌레 방제를 위한 종합적 방제방안

    Jeon, S. J., S. K. Kim

    전신재, 김삼규

    Thrips are among the most important pests of asparagus. The most effective method to control this pest is to insecticides spraying. Currently ... + READ MORE
    Thrips are among the most important pests of asparagus. The most effective method to control this pest is to insecticides spraying. Currently, a total of 114 pesticides have been registered for the control of pests of asparagus, 60 of which are registered for thrips control. However, crops are harvested every day, applying insecticides to control thrips is not ideal. Moreover, a recent study has shown that depending on the type of registered insecticide used, less than the residual or quantitative limit could be detected at 3-5 days after spraying. Therefore, if the asparagus is harvested after the application of insecticides, it should be stored in a cold chamber for 3 or more days before being moved to market. The use of sticky traps to control thrips is effective not only for monitoring them but also for reducing their numbers without applying insecticides. Yellow and blue sticky traps were usually used, but the yellow traps have been shown to attract more thrips than the blue ones. A recent study showed the high insecticidal effects of carbon dioxide on adult and larval thrips, at 60% concentration (20°C for 24 hours) or 40% concentration (24°C for 24 hours). Soap was also shown to have a high insecticidal effect after thrips-infested asparagus was immersed in soap water (diluted 1,000 times) for 15 minutes. Entomopathogenic fungi, such as Beauveria bassiana and Lecanicillum attenuatum, which occur naturally in soil, also help to reduce the initial thrips population by attacking the pupae in the soil in the spring harvest period. - COLLAPSE
    July 2019
Journal Informaiton Agriculture and Life Sciences Research Institute Journal of Agricultural, Life and Environmental Sciences
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