Abstract
Three successive experiments were included in this trial. The first experiment was a derailed screening program to test the effects of various temperatures and durations on the fruit quality of strawberry fruit. Fruit were exposed to temperatures of 37, 40, 43, and 46°C for durations of 20, 40, 60, 80, end 100 minutes at each temperature level. The temperatures and durations which were detrimental to fruit quality were eliminated; then experiments 2 & 3 were conducted using the remaining temperature and duration levels to study their effects on fruit quality, respiration, and ethylene production.Strawberries heated to 46° C were too severely damaged for other test comparisons. Those exposed to temperature treatments of 43 °C for 30 or 60 mins were consistently less firm, had more heat damage, developed less decay, and had lower CO2 and ethylene production than fruit from lower temperature treatments or control fruit. Differences were sometimes significant.While the heat damage scores from fruit exposed to the 43°C treatments indicated some serious injury, the fruit were stiff judged to be marketable. There were no significant differences in soluble solids content (SSC), titratable acidity, SSC/acid ratio, or juice pH among any of the treatments.
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