EFFECTS OF HEATING RATE ON THE MORTALITY OF 5TH-INSTAR CODLING MOTH (LEPIDOPTERA, TORTRICIDAE)

Authors
Citation
Lg. Neven, EFFECTS OF HEATING RATE ON THE MORTALITY OF 5TH-INSTAR CODLING MOTH (LEPIDOPTERA, TORTRICIDAE), Journal of economic entomology, 91(1), 1998, pp. 297-301
Citations number
30
Categorie Soggetti
Entomology,Agriculture
ISSN journal
00220493
Volume
91
Issue
1
Year of publication
1998
Pages
297 - 301
Database
ISI
SICI code
0022-0493(1998)91:1<297:EOHROT>2.0.ZU;2-9
Abstract
Models were developed to describe the effects of heating rate during h eat treatments on the mortality of 5th-instar codling moth, Cydia pomo nella (L.). An old model, developed from previous studies over a limit ed range of heat treatments, was Ist formulated. Subsequent heat treat ments, 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 stu dy 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 m odel was awkward to use because it required a correction for each trea tment temperature. The new model incorporated treatment temperature in to the equation, and was more accurate and easier to use. It was deter mined that the slower the rate of heating, the longer the exposure to the final treatment temperature was needed to achieve 95% mortality.