Laboratory studies were conducted to determine the effects of vacuum and controlled atmosphere on mortality of aphids, Nasonovia ribisnigri (Mosley) and Macrosiphum euphorbiae (Thomas), and leafminer, Liriomyza langei Frick, and on the visual quality of iceberg lettuce at three different temperatures. Effective control of aphids was achieved with vacuum of 50 mbar and controlled atmosphere with 6% CO2 at 5°ãC in 4 days in small treatment chambers. Mortality was >96% when leafminer larvae were treated with vacuum and 6% CO2 CA treatments for 4 day. None of the treatments had negative effects on visual quality of iceberg lettuce. Large experiments with treatment chambers of similar size as commercial lettuce cartons were also conducted to determine potential of CA for postharvest pest control on lettuce.
Species 1: Homoptera Aphididae Nasonovia ribisnigri (lettuce aphid)
Species 2: Homoptera Aphididae Macrosiphum euphorbiae (potato aphid)
Species 3: Diptera Agromyzidae Liriomyza langei
Keywords: Controlled atmosphere, vacuum
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