Postharvest biological control of brown rot in peaches after cold storage preceded by preharvest chemical control
Palavras-chave:
Monilinia fructicola, Trichoderma harzianum, quality, skin browningResumo
Pathogenic fungi cause skin darkening and peach quality depreciation in post harvest. Therefore, alternativetechniques to chemical treatment are necessary in order to reduce risks to human health. The aim of this study was
to evaluate the effect of the application of Trichoderma harzianum in association with different fungicides applied
before harvest to ‘Eldorado’ peaches for brown rot control and other quality parameters during storage. The treatments
consisted of five preharvest fungicide applications (control, captan, iprodione, iminoctadine and tebuconazole)
associated with postharvest application of T. harzianum, after cold storage (with and without application), in three
evaluation times (zero, two and four days at 20 °C), resulting in a 5x2x3 factorial design. The application of T.
harzianum only brought benefits to the control of brown rot when combined with the fungicide captan, at zero day
shelf life. After two days, there was a greater skin darkening in peaches treated with T. harzianum compared with
peaches without the treatment, except for peaches treated with the fungicide iprodione and T. harzianum. The
application of T. harzianum during postharvest showed no benefits for the control of brown rot, however, the
association with fungicides reduced the incidence of Rhizopus stolonifer during the shelf life.
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