Abstract
Controlled atmosphere (CA) storage which involves 32° to 38°. temperatures. oxygen concentrations of 3% and carbon dioxide levels of 2% to 8% is being used to prolong storage and shelf life of apples. The survival of larvae of the apple maggot ( Rhagoletis pomonella (Walsh)) and plum curculio ( Conotrachelus nenuphar (Herbst)) in apples held in this type of storage as compared with standard cold storage at 32°F was studied using naturally infested Twenty-Ounce and Northern Spy apples and thinning apples artificially infested with plum curculio. Results show standard storagc was lethal to apple maggot and plum curculio larvae in 33 days or less whereas CA storage at 38°F. was lethal in less than 00 days. Plum curculio larvae were unable to survive 38°F. CA storage for 83 days, The results show that the ninimum stomge time (90 days) required for certified eon trolled atmosphere apples is completely lethal to any apple maggot and plum curculio that might be present in the fruit.
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