Assessing the efficacy of controlled atmosphere temperature treatment system (CATTS) against codling moth inside harvested apples
The controlled atmosphere temperature treatment system (CATTS) was assessed as a disinfestation tool to control codling moth (CM; Cydia pomonella) larvae inside apples. Codling moth mortality and apple quality were assessed after exposure to one of 10 treatments, which were combinations of five variables, namely, O2 concentration (air 20.9%, 1, 2 or 3%); CO2 concentrations (air 0.04% or 15%); 12 or 24°C/h ramp rate up to 46°C; air speed 1.3 m/s; and either 2.5- or 3-h treatment time. CATTS treatments resulted in higher CM mortality than equivalent hot air treatments. The treatments involving 1 or 2% O2 combined with 15% CO2 and a ramp of 12°C/h or 24°C/h to 46°C, with a total treatment time of 3 h or 2.5 h and a 1.3 m/s air speed resulted in 100% mortality of CM. However, all CATTS and hot air treatments compromised apple quality. High CM mortality can be achieved using CATTS, but refinement of the protocol is needed to improve fruit quality outcomes.
Neven L, Mitcham E 1996. CATTS (Controlled Atmosphere/Temperature Treatment System): A novel tool for the development of quarantine treatments. American Entomologist 42(1): 56-59. https://doi.org/10.1093/ae/42.1.56
Neven LG, Drake SR, Shellie KC 2001. Development of a high temperature controlled atmosphere quarantine treatment for pome and stone fruits. Acta Horticulturae 553 (2): 457-460. https://doi.org/10.17660/ActaHortic.2001.553.107
Neven L 2005. Combined heat and controlled atmosphere quarantine treatments for control of codling moth in sweet cherries. Journal of Economic Entomology 98(3): 709-715. https://doi.org/10.1603/0022-0493-98.3.709
Neven L, Drake SR 2000. Comparison of alternative postharvest quarantine treatments for sweet cherries. Postharvest Biology and Technology 20(2): 107-114. https://doi.org/10.1016/S0925-5214(00)00110-1
Neven L, Rehfield-Ray L 2006. Confirmation and efficacy tests against codling moth and oriental fruit moth in apples using combination heat and controlled atmosphere treatments. Journal of Economic Entomology 99(5): 1620-1627. https://doi.org/10.1093/jee/99.5.1620
Neven L, Rehfield-Ray L, Obenland D 2006. Confirmation and efficacy tests against codling moth and oriental fruit moth in peaches and nectarines using combination heat and controlled atmosphere treatments. Journal of Economic Entomology 99(5): 1610-1619. https://doi.org/10.1093/jee/99.5.1610
Shellie K, Neven, LG, Drake, SR 2001. Assessing ‘Bing’ sweet cherry tolerance to a heated controlled atmosphere for insect pest control. HortTechnology 11(2): 308-311.
UNEP 1987. Montreal protocol on substances that deplete the ozone layer United Nations Environment Programme. Published by Secretariat for The Vienna Convention for the Protection of the Ozone Layer & The Montreal Protocol on Substances that Deplete the Ozone Layer, United Nations Environment Programme, Nairobi, Kenya http://www.unep.org/ozone