Effects of heating rate on the mortality of fifth-instar codling moth (Lepidoptera: Tortricidae)

Models were developed to describe the effects of heating rate during heat treatments on the mortality of 5th-instar codling moth, Cydia pomonella (L.). An old model, developed from previous studies over a limited range of heat treatments, was 1st formulated. Subsequent heat treatments, using a compu...

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Bibliographic Details
Published in:Journal of economic entomology 1998-02, Vol.91 (1), p.297-301
Main Author: Neven, L.G. (Yakima Agricultural Research Laboratory, USDA, ARS, Wapato, WA.)
Format: Article
Language:English
Subjects:
Animal productions
Animals
APPLES
Biological and medical sciences
CYDIA POMONELLA
Fruit
Fundamental and applied biological sciences. Psychology
General aspects
HEAT TREATMENT
Hot Temperature
INSECT CONTROL
Larva - physiology
LARVAE
MATHEMATICAL MODELS
Models, Biological
MORTALITY
Moths - growth & development
Moths - physiology
QUARANTINE
TEMPERATURE
Terrestrial animal productions
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Description
Summary:Models were developed to describe the effects of heating rate during heat treatments on the mortality of 5th-instar codling moth, Cydia pomonella (L.). An old model, developed from previous studies over a limited range of heat treatments, was 1st formulated. Subsequent heat treatments, using a computerized water bath system and linear heating rates of 4, 6, 8, 10, and 12 degrees C/h at 42, 44, and 46 degrees C, were used to test the old model. The mortality data from the water bath study were used to develop a new model. Although the old model provided a good estimate of the effects of heating rate on 5th-instar mortality, it overestimated mortality at midrange heating rates. Also, the old model was awkward to use because it required a correction for each treatment temperature. The new model incorporated treatment temperature into the equation, and was more accurate and easier to use. It was determined that the slower the rate of heating, the longer the exposure to the final treatment temperature was needed to achieve 95% mortality
ISSN:0022-0493
1938-291X
DOI:10.1093/jee/91.1.297