Safe treatments to inhibits decay during storage of melons
2007
Ilic, Z.,Poljoprivredni fakultet, Zubin Potok (Serbia) | Fallik, E.,Volcani Center, Bet Dagan (Israel). Department of Postharvest Science | Djurovka, M.,Poljoprivredni fakultet, Novi Sad (Serbia)
Hydrogen peroxide (Sanosil-25) and sodium bicarbonate (SBC) could be an alternative biocide to the fungicide, imazalil, thus eliminating undesirable residues on melons fruit. Sanosil-25 is a universally applicable disinfectant compound that is highly effective against pathogenetic bacteria, fungi,etc. The compound contains 48% hydrogen peroxide (H2O2) and 0.05% silver ion (Ag+) as a stabilizing agent, inhibited the mycelial growth of the two main decay-causing fungi of melons, Alternaria alternata and Fusarium solani, in vitro at concentration between 5 and 10 ml/l: However, in in vitro experiments, Sanosil-25 at a concentration of 5 ml/l marcedly decreased decay when incorporated into wax treatment, and produced no phytotoxic effect. This treatment may provide an alternative to imazalil, which, although more effective, gives problems with residue levels a concentration of 10 ml/l of Sanosil-25 proved phytotoxic. Sodium bicarbonate (SBC) inhibited in vitro micelial growth of Alternaria alternata, Fusarium spp. and Rhizopus stolonifer, its action was fungistatic rather than fungicidal. Coating commercially harvested Galia melons with wax containing 2% SBC reduced decay incidence after storage and shelf life simulation, compared with untreated or wax treated controls, to a commercially level of 9%. This treatment also maintained the fresh and blemish-free appearance of the fruit, as at harvest.
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