Naslov
Near-harvest applications of Metschnikowia fructicola, ethanol and sodium bicarbonate to control postharvest diseases of grape in central California

Autori
Karabulut, O.A. ; Smilanick, J.L. ; Mlikota Gabler, F. ; Mansour, M. ; Droby, S.

Izvornik
Plant Disease (0191-2917) 87 (2003), 11; 1384-1389

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
metschnikowia fructicola; ethanol; sodium bicarbonate; table grapes; Botrytis cinerea; Alternaria alternata; Aspergillus sp.; Cladosporium sp.

Sažetak
The yeast Metschnikowia fructicola, ethanol, and sodium bicarbonate (SBC), alone or in combinations, were applied to table grapes on vines 24 h before harvest to control the incidence of postharvest diseases. In four experiments, all significantly reduced the total number of decayed berries caused by Botrytis cinerea, Alternaria spp., or Aspergillus niger after storage for 30 days at 1oC followed by 2 days at 20oC. In three experiments, a mean gray mold incidence (caused by B. cinerea) of 34.2 infected berries per kilogram among untreated grape was reduced by Metschnikowia fructicola at 2 x 107 CFU/ml, ethanol at 50% (vol/vol), or SBC at 2% (wt/vol) to 12.9, 8.1, or 10.6 infected berries per kilogram, respectively. Ethanol, SBC, and SO2 generator pads were similarly effective. M. fructicola effectiveness was not improved when combined with ethanol or SBC treatments. Ethanol and yeast treatments did not harm the appearance of the grapes. M. fructicola and SBC left noticeable residues, and SBC caused some visible phytotoxicity to the rachis and berries. Ethanol applied at 50% (vol/vol) reduced epiphytic fungal and bacterial populations by about 50% compared with controls. M. fructicola populations persisted on berries during storage when applied alone or after ethanol treatments, whereas SBC reduced its population significantly.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

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