THE USE OF HYDROGEN-PEROXIDE TO CONTROL POSTHARVEST DECAY ON GALIA MELONS

Sanosil-25, a disinfectant containing 48% hydrogen peroxide and silver salts as stabilising agents, inhibited the mycelial growth of the two main decays causing fungi of melons, Alternaria alternata and Fusarium solani in vitro at concentrations between 5000 and 10 000 mu l litre(-1). However, in in vivo experiments, Sanosil-25 markedly decreased decay at a concentration of 5000 mu l litre-l when incorporated into a 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 10 000 mu l litre(-1) proved phytotoxic.