Department of Conservation Ecology and Entomology, University of Stellenbosch, Private Bag X1, Matieland, 7602, South Africa.
J Econ Entomol. 2010 Apr;103(2):265-71. doi: 10.1603/ec09306.
Controlled atmosphere/temperature treatment system (CATTS) is an environmentally friendly postharvest mitigation treatment that uses high temperature forced-air combined with a low oxygen and high carbon dioxide atmosphere to control quarantine pests. The development of CATTS treatments is expensive and time-consuming. For a more rapid assessment of different species and life stages' tolerances to heated controlled atmospheres, the controlled atmosphere water bath (CAWB) system can be used to help advance the development of CATTS treatments for pests. The CAWB system was used to test the response of eggs and larval stages of Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae). Eggs and larvae at different developmental stages were treated under regular air and a modified controlled atmosphere of 1% O2 and 15% CO2, at two ramping heat rates: 12 and 24 degrees C/h. Typically the faster heat rate and modified atmosphere reduced treatment times required to control the different life stages. T. leucotreta larvae were more tolerant of the treatments than eggs. The most tolerant life stage was the fourth instar. Effective treatments against the most tolerant life stage determined by the CAWB system can now be used to develop CATTS technology against T. leucotreta. Further research will focus on developing CATS treatments using infested fruit to determine effective treatments that maintain fruit quality.
控温和调气处理系统（CATTS）是一种环保型的采后缓解处理方法，利用高温强制空气和低氧高二氧化碳气氛来控制检疫性害虫。CATTS 处理的开发既昂贵又耗时。为了更快速地评估不同物种和生命阶段对加热控气环境的耐受性，控温水浴（CAWB）系统可用于帮助推进针对害虫的 CATTS 处理的开发。CAWB 系统用于测试马铃薯块茎蛾（Thaumatotibia leucotreta（Meyrick））卵和幼虫期对不同处理的反应。在常规空气和 1% O2 和 15% CO2 的改良控气环境下，以 12 和 24°C/h 的两种升温速率对处于不同发育阶段的卵和幼虫进行处理。通常，较快的升温速率和改良的气氛会减少控制不同生命阶段所需的处理时间。与卵相比，T. leucotreta 幼虫对处理更耐受。最耐受的生命阶段是第四龄期幼虫。现在可以使用 CAWB 系统确定的针对最耐受生命阶段的有效处理方法来开发针对 T. leucotreta 的 CATTS 技术。进一步的研究将集中在使用受感染的水果开发 CATS 处理方法，以确定保持水果质量的有效处理方法。
