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
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.