Preharvest Chitosan and Postharvest UV Irradiation Treatments Suppress Gray Mold of Table Grapes

Plant Disease
G RomanazziJ L Smilanick

Abstract

The effectiveness of chitosan treatment of table grapes, alone or in combination with ultraviolet-C (UV-C) radiation, to control postharvest gray mold caused by Botrytis cinerea, was determined in California, United States. The influence of these treatments on catechin and resveratrol contents and chitinase activity in grape berry skins also was assessed. Clusters of cvs. Thompson Seedless, Autumn Black, and Emperor were sprayed in the vineyard with 1% chitosan, then harvested daily for 5 days. Promptly after harvest, they were inoculated with B. cinerea. Decay incidence and disease severity were significantly reduced by chitosan, which was most effective on berries harvested 1 or 2 days after treatment. In another experiment, grape berries were sprayed in the vineyard with chitosan, harvested 2 days later, irradiated for 5 min with UV-C (0.36 J/cm2), and inoculated with B. cinerea 2 days later. Combined chitosan and UV-C treatments applied to cv. Autumn Black or selection B36-55 were synergistic in reducing gray mold incidence and severity compared with either treatment alone. Preharvest chitosan treatment increased neither concentration of catechin or resveratrol nor activity of chitinase in berry skin. Conversely, UV-C irrad...Continue Reading

References

Oct 29, 2000·Journal of Agricultural and Food Chemistry·E CantosF A Tomás-Barberán
Apr 21, 2001·Journal of Agricultural and Food Chemistry·M AdrianR Bessis
Mar 5, 2002·Letters in Applied Microbiology·S K SagooS Roller
Aug 1, 1980·Plant Physiology·L A Hadwiger, J M Beckman

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Citations

May 16, 2015·Environmental Science and Pollution Research International·Ke HuangYiqing Liu
Feb 22, 2017·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Mohidul Hasan, Hanhong Bae
Dec 6, 2014·Journal of Food Science and Technology·Madushani EdirisinghePeter G Alderson
Feb 7, 2014·Journal of Food Science·María Isabel Fernández-MarínEmma Cantos-Villar
Oct 30, 2016·Critical Reviews in Food Science and Nutrition·Gianfranco RomanazziDharini Sivakumar

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