Submitted to: Methyl Bromide Alternatives and Emissions Research Conference Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: January 1, 2003
Publication Date: January 1, 2003
Citation: Obenland, D.M., Neipp, P.W., Neven, L.G. Stone fruit qualty following high temperature/controlled atmosphere treatment. Methyl Bromide Alternatives and Emissions Research Conference Proceedings. Technical Abstract: High temperature forced air in combination with 1% oxygen and 15% carbon dioxide (known as CATTS) is an effective quarantine treatment against oriental fruit moth and codling moth in peaches and nectarines but the effect of treatment on fruit quality must be fully ascertained prior to any commercial implementation. Four peach cultivars were subjected to treatment at 46C (12C/h ramp, 1% oxygen, and 15% carbon dioxide) for 0, 3, 4, 5, 6 and 7 h to determine the tolerance limit of stone fruit to CATTS. Fruit were unable to ripen and surface injury became very prevalent following treatments of 5 h or more. None of the other quality factors were altered in a negative way. Since 3 h of treatment is all that is required to achieve quarantine security, it appears that stone fruit have considerable tolerance to CATTS treatment in excess of what is required. Forced air cooling following CATTS treatment was tried as a means to reduce surface injury but was found to have no effect. Conditioning, a common industry practice, also had very little influence on the effect of CATTS treatment on stone fruit.