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1 January 2015 Thermal Death Kinetics of Fifth-Instar Corcyras cephalonica (Lepidoptera: Galleriidae)
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Abstract

The infestation of rice moth, Corcyras cephalonica (Lepidoptera: Galleriidae), causes severe losses in postharvest walnuts. Heat has been studied as a phytosanitary treatment to replace chemical fumigation for controlling this pest. Information on kinetics for thermal mortality of C. cephalonica is needed for developing effective postharvest phytosanitary thermal treatments of walnuts. Thermal death kinetics of fifth-instar C. cephalonica were investigated at temperatures between 44°C and 50°C at a heating rate of 5°C min-1 using a heating block system. The results showed that thermal-death curves for C. cephalonica larvae followed a 0 order of kinetic reaction. The time to reach 100% mortality decreased with increasing temperature from 150min at 44°C to 2.5 min at 50°C. The activation energy for controlling C. cephalonica was 466–592 kJ/mol, and the z value obtained from the thermal death time curve was 3.3°C. This kinetic model prediction could be useful in designing the thermal treatment protocol for controlling C. cephalonica in walnuts.

© The Author 2015. Published by Oxford University Press on behalf of the Entomological Society of America. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com
Liling Yang, Li Zhongxin, Wenqiang Ma, Shengkun Yan, and Kuanbo Cui "Thermal Death Kinetics of Fifth-Instar Corcyras cephalonica (Lepidoptera: Galleriidae)," Journal of Insect Science 15(1), 1-5, (1 January 2015). https://doi.org/10.1093/jisesa/iev012
Received: 10 September 2014; Accepted: 16 January 2015; Published: 1 January 2015
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