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KMID : 1160220140420030262
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Mycobiology
2014 Volume.42 No. 3 p.262 ~ p.268
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Effect of Thymol and Linalool Fumigation on Postharvest Diseases of Table Grapes
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Shin Mi-Ho
Kim Jin-Hee
Choi Hyo-Won
Keum Yoong-Soo
Chun Se-Chul
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Abstract
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Several postharvest diseases of table grapes (Vitis vinifera) occur during storage, and gray mold rot is a particularlysevere disease because the causal agent, Botrytis cinerea, grows at temperatures as low as 0oC. Other postharvest diseases, suchas those caused by Penicillium spp. and Aspergillus spp., also often lead to deterioration in the quality of table grapes afterharvest. The use of plant essential oils such as thymol and linalool, to reduce postharvest diseases in several kinds of fruits,including table grapes and oranges, has received much attention in European countries. However, to the best of our knowledgethere has been no report of the use of thymol fumigation to control gray mold in table grapes in Korea. Thymol (30 μg/mL) andlinalool (120 μg/mL) significantly inhibited mycelial growth and conidia germination of B. cinerea. The occurrence rate of graymold rot of B. cinerea and other unknown fungi was significantly reduced by fumigation with 30 μg/mL thymol in several tablegrape cultivars, such as Campbell early, Muscat Bailey A, Sheridan, and Geobong. In this study, fumigation with 30 μg/mL thymol,had no influence on the sugar content and hardness of grapes, but reduced fungal infection significantly. This suggests that 30 μg/mLthymol could be utilized to reduce deterioration of grapes due to gray mold and other fungal infections during long-term storage.
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KEYWORD
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Botrytis cineria, Fumigation, Linalool, Postharvest diseases, Table grapes, Thymol
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