Abstract
The use of heat to disinfest storage structures (the bake-out technique) is enjoying a resurgence of interest because it represents a possible replacement for whole structure fumigation with methyl bromide. This technique uses moderately elevated temperatures typically in the range 50–60°C, over a period of hours to days. The objective of this work was to determine the basic requirements to control Trogoderma variabile using heat so that effective bake-out procedures could be developed. The most heat-tolerant stage of T. variabile was shown to be the full-grown larva and it requires 36.4°C-min above the threshold of 49.4°C to achieve 99% mortality. Thus the temperatures used in a practical bake-out should be as high as the other constraints will allow, and maintained somewhat longer than data for other species would suggest. In so doing, a control procedure aimed at T. variabile would be expected to control all other species present.
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