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Effects of vacuum and controlled atmosphere treatments on insect mortality and lettuce quality

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Laboratory studies were conducted to determine the effects of vacuum and controlled atmosphere (CA) on the mortality of aphids, Nasonovia ribisnigri and Macrosiphum euphorbiae, and leafminer, Liriomyza langei [L. huidobrensis], and on the visual quality of iceberg lettuce at three different temperatures (0, 5, or 10°C with variation of ±1°C). Vacuum at 50 m bar and controlled atmosphere with 6% CO2 were effective in controlling the aphids and leafminer larvae. Complete control of N. ribisnigri and M. euphorbiae was achieved with vacuum treatments and 6% CO2 CA treatments at 5°C in 4 days. Mortality was >96% when leafminer larvae were treated with vacuum and 6% CO2 CA treatments for 4 days. However, leafminer pupae were more tolerant to the treatments and the highest mortality was close to 60% in 4 days with CO2 under vacuum. None of the treatments had negative effects on visual quality of iceberg lettuce. Results from this study are encouraging and warrant further and large-scale research.
Liu, Y.B.
Includes references
Journal of economic entomology 2003 Aug., v. 96, no. 4
Entomological Society of America
Journal Articles, USDA Authors, Peer-Reviewed
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