Post-harvest Treatment on the Peach Pyralid Moth and the Small Tea Tortrix Moth Infesting Apples Using Controlled Atmosphere and Temperature Treatment System
2015
Hong, Y., Andong National University, Andong, Republic of Korea | Kwon, K., Institute of Biological Utility, Andong, Republic of Korea | Kim, Y., Andong National University, Andong, Republic of Korea
A complete control on quarantine insect pests is required for exporting domestic apples to other countries. To this end, a controlled atmosphere and heat treatment system (CATTS) has been developed as a post-harvest treatment. This study determined the CATTS conditions to control completely two lepidopteran insect pests, the smaller tea tortrix moth, Adoxophyes paraorana and the peach pyralid moth, Dichocrocis punctiferalis, which exhibit different feeding behviors. In both species, the fifth instar larvae were the most tolerant developmental stage to the heat treatment. Under CATTS conditions with 15% CO2 and 1% O2 for 1 h heat treatment at 46 degrees centigrade, the fifth instar larvae of A. paraorana exhibited a complete lethality, while those of D. punctiferalis underwent 88% mortality. To control completely the fifth instar larvae of D. punctiferalis, 2 h heat treatment required under the same atmosphere condition. These CATTS treatment effects were confirmed against over 3,000 fifth instar larvae of each species infesting apples. This study demonstrates that the longer exposure to CATTS conditions is required for the complete disinfestation of the internal apple feeder compared to the non-internal apple feeder.
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