All stages of Tineola bisselliella were subjected to temperatures between 30°C. and 43°C. for periods varying between a few hours and a number of days.
Although humidity was not an important factor, it was controlled at 70 per cent., and various other humidities were used at some of the lower temperatures.
Complete mortality occurred at relatively low temperatures, 41°C. for four hours being lethal to all stages of the insect.
The eggs appear to be the most resistant stage. Some are able to hatch at 35°C. and some to survive exposure of four hours at 40°C.
Development through the entire life-cycle is possible at 33°C.
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