Abstract

GOMEZ JAIMES, Rafael et al. Sporicidal activity of the electrolyzed solutionwith neutral pH in fungi of postharvest importance. Rev. Mex. Cienc. Agríc [online]. 2017, vol.8, n.spe19, pp.3993-4007. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v0i19.668.

The electroless water with neutral pH (7) is a novel antimicrobial agent, which has an effect on a large variety of microorganisms, safe for humans and the environment. The efficiency of electrolyzed super oxidation water with neutral pH (SES) in the reduction of spore germination and development of the germinative tube in fungi of postharvest importance was determined. A suspension of 8 × 107 mL-1spores of the fungiBotrytis cinereaisolated from blackberry,Colletotrichum gloeosporioidesisolated from mango, guava and lychee,Fusarium solaniisolated from chili and stevia,Monilinia fructicolaisolated from peach,Penicillium digitatumisolated from Mexican lemon and Persian lemon,Penicilliumsp., papaya isolate andRhizopus stoloniferisolated from yaca and soursop, were in contact with the SES for 5 min at concentrations of 3, 5, 6, 8, 18, 24, 27, 29, 36 and 43 ppm free chlorine, and sterile distilled water (control). Spores were seeded in culture medium potato dextrose agar(Bioxon®); the evaluations were carried out at 24 and 48 hours after sowing. The 100% inhibition of spore germination andBotrytisgerm length was observed in the concentration range of 18-43 ppm,Colletotrichum(6-43 ppm),Fusarium(6-43 ppm),Monilinia(8 and 24-43 ppm),Penicillium(18-43 ppm),Rhizopusisolated from soursop (5-24 and 29-43 ppm) andRhizopusof yaca (18-43 ppm). The results suggest that SES could be used as an alternative control of post-harvest fungi.

Keywords : fruit; pathogen; rot; spores.