Abstract
SummaryThe authors assayed the ability of some reaction products, essentially isothiocyanates, derived from the myrosinase‐catalysed hydrolysis (neutral pH) of six natural glucosinolates to inhibit germination and mycelial growth of Botrytis cinerea, Rhizopus stolonifer, Monilinia laxa, Mucor piriformis and Penicillium expansum, the leading postharvest fungal pathogens of fruit and vegetable crops. All of the tested products showed antifungal activity, although they proved less effective against mycelial growth than in germination control. The isothiocyanates produced by enzymatic hydrolysis of glucoraphenin, sinalbin and sinigrin were particularly effective because they completely inhibited conidic germination of all five pathogens considered. The sinigrin‐derived isothiocyanate exhibited a wide pathogen‐control spectrum, either inhibiting conidia germination altogether or delaying by 3–6 days the onset of mycelial growth compared to the control.
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