Nonchemical quarantine treatments, using a combination of short duration high temperatures under low oxygen, elevated carbon dioxide atmospheric environment were developed to control western cherry fruit ßy, Rhagoletis indifferens Curran, in sweet cherries, Prunus avium (L.). The two treatments developed use a chamber temperature of 45ЊC for 45 min and a chamber temperature of 47ЊC for 25 min, both under a 1% oxygen, 15% carbon dioxide, Ϫ2ЊC dew point environment. Both these treatments have

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... shown to provide control of all life stages of western cherry fruit ßy while preserving commodity market quality. There was no deÞnitive egg or larval stage, which was demonstrated to be the most tolerant to either controlled atmosphere temperature treatment system treatment. EfÞcacy tests for both treatments resulted in 100% mortality of Ͼ5,000 western cherry fruit ßies in each treatment. These treatments may provide, with further study, quarantine security in exported sweet cherries where western cherry fruit ßy is a quarantine concern and fumigation with methyl bromide is not desired.