Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/8706
Title: Effect of continuous 0.3µL/L gaseous ozone exposure on fungicide residues on table grape berries
Authors: Karaca, Hakan
Walse, S.S.
Smilanick, J.L.
Keywords: Degradation
Fungicides
Grapes berries
Ozone
Pesticides
Storage
Vitaceae
Abstract: The persistence of residues of some fungicides, commonly applied in table grape vineyards to reduce bunch rot, was investigated during the cold storage of 'Thompson Seedless' table grape stemmed berries in atmospheres of air or 0.3 µL/L ozone enriched air. Grape berries were sprayed with a mixture of boscalid, iprodione, fenhexamid, cyprodinil, and pyrimethanil solutions, dried in air for 24. h, and packed in plastic clamshell containers in expanded polystyrene boxes. The boxes were stored either in ozone or in ambient air atmosphere (2 °C, 95% RH) for 36. d. Residue analyses were done initially and at 12-d intervals using gas chromatography-mass spectrometry. Residues of boscalid, iprodione, fenhexamid, and pyrimethanil declined during storage in air, but cyprodinil residues did not change significantly during 36-d storage. Storage in the ozone atmosphere markedly accelerated the rates of decline of fenhexamid, cyprodinil, and pyrimethanil, but not those of boscalid or iprodione. At the end of storage, degradation of fenhexamid, cyprodinil, or pyrimethanil was 1.6-, 2.8-, or 3.6-fold higher, respectively, in the ozone atmosphere compared that in air. Despite their structural similarity, pyrimethanil declined more rapidly in an ozone atmosphere than cyprodinil. Fenhexamid declined in both air and ozone more rapidly than the other fungicides; at the end of storage period, only 59.2% or 35.5% of the initial residue remained after air or ozone storage, respectively. Our results have shown that gaseous ozone treatment during storage has a great potential for degrading contemporary fungicides related to table grape production. © 2011 Elsevier B.V.
URI: https://hdl.handle.net/11499/8706
https://doi.org/10.1016/j.postharvbio.2011.07.004
ISSN: 0925-5214
Appears in Collections:Mühendislik Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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