Near-Harvest Applications of Metschnikowia fructicola, Ethanol, and Sodium Bicarbonate to Control Postharvest Diseases of Grape in Central California

Plant Disease
Ozgur Akgun KarabulutSamir Droby

Abstract

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 1°C followed by 2 days at 20°C. 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 × 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 stor...Continue Reading

References

Feb 2, 2002·Systematic and Applied Microbiology·C P Kurtzman, S Droby
Jan 1, 1992·Annual Review of Phytopathology·J H Andrews
Jan 1, 1990·Annual Review of Phytopathology·P B Adams

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Citations

Oct 3, 2019·World Journal of Microbiology & Biotechnology·Florian M FreimoserQuirico Migheli
Apr 10, 2016·Journal of the Science of Food and Agriculture·Loukas KanetisVlasios Goulas
Aug 5, 2005·Annual Review of Phytopathology·D R Fravel
Nov 26, 2013·Folia Microbiologica·Maurizio Sisti, Vincenzo Savini
Sep 10, 2014·Journal of the Science of Food and Agriculture·Nivedita SonkerPooja Singh
Feb 9, 2021·Recent Patents on Food, Nutrition & Agriculture·Nicola De SimonePasquale Russo

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