Botrytis cinerea Decay in Apples is Inhibited by Postharvest Heat and Calcium Treatments

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  • 1 1ARO–Volcani Center, Bet Dagan, Israel
  • 2 2Horticultural Crops Quality Laboratory, USDA/ARS, Beltsville, MD 20705
  • 3 3The Univ. of Tennessee, Knoxville, TN 37901

`Golden Delicious' apples (Malus domestica Borkh.) were treated postharvest with heat (38C/4 d or 42C/24 h) or 2% CaCl2 (applied as a dip or pressure-infiltrated) or a combination thereof and then stored. Decay caused by Botrytis cinerea was virtually eliminated in fruit heated at 38C after inoculation prior to storage, regardless of Ca treatment. Apples inoculated upon removal from storage were almost completely protected from decay if they had been previously pressure-infiltrated with Ca, regardless of heat regime. Heating at 42C or Ca dips were only partially effective in preventing decay. Pressure infiltration of Ca (regardless of heat regime) or heating at 38C (regardless of Ca treatment) resulted in firmer fruit (68 N) than Ca dips or heating at 42C (56 N), which were firmer than nontreated fruit (52 N).

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