Rafael Gómez Jaimes

Actividad esporicida de la solución electrolizada con ph neutro en hongos de importancia postcosecha

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-1 spores of the fungi Botrytis cinerea isolated from blackberry, Colletotrichum gloeosporioides isolated from mango, guava and lychee, Fusarium solani isolated from chili and stevia, Monilinia fructicola isolated from peach, Penicillium digitatum isolated from Mexican lemon and Persian lemon, Penicillium sp., papaya isolate and Rhizopus stolonifer isolated 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 and Botrytis germ 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), Rhizopus isolated from soursop (5-24 and 29-43 ppm) and Rhizopus of yaca (18-43 ppm). The results suggest that SES could be used as an alternative control of post-harvest fungi.