The effect of electrolyzed water on phytopathogenic fungi that infect Prunus persica var. nectarine at post-harvest / Efecto del agua electrolizada en fitopatógenos fungosos que afectan Prunus persica var. nectarine en postcosecha


  • Javiera Molina B.
  • Luz María Pérez R.
  • Jaime R. Montealegre A.



Electrolyzed water (EW), Botrytis cinerea, Geotrichum candidum, Monilinia laxa, Penicillium expansum, Rhizopus stolonifer


Postharvest immersion of Prunus persica var. nectarine into electrolyzed water, EW (25.2 ppm of active ingredient), at different time periods of inoculation with pathogens previously isolated from rotted fruits (A, immediately before fruit immersion; B, three hours after fruit immersion and C, three hours before fruit immersion), significantly reduced fruit rotting caused by Botrytis cinerea (A: 40.2%, B: 43.1% and C: 39.1%), or by Monilinia laxa (A: 80.9%, B: 49.8% and C: 46.2%), or by Penicillium. expansum (A: 60.3%, B: 31.9% and C: 49.7%) or by Rhizopus stolonifer (A: 74.4%, B: 60.8% and C: 72.6%). Immersion of fruits into NaClO (100 ppm of active ingredient), showed significant differences with EW treatment: B. cinerea (B/NaClO: 34.5%), M. laxa (A/NaClO: 62.2%; B/NaClO: 36.2% and C/NaClO: 36.2%); P. expansum (C/NaClO: 60.9%) and R. stolonifer (A/NaClO: 81.3%; B/NaClO: 71,2% and C/NaClO: 83.9%) being in most cases, EW better than NaClO. Non inoculated fruits did not show any negative effect after treatment with EW or with NaClO. Also, IC50 values for EW and for NaClO obtained in in vitro tests for mycelia development and spore germination of the different pathogens, correlate well with the in vivo tests. All results suggest that EW can be used as an alternative method to NaClO to control postharvest fungi of Prunus persica var. nectarine fruits , considering that the exposure times and the concentration of EW may be different, depending on the pathogen to be controlled.


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