Abstract
Under a constant vapor pressure deficit of 8.41 mm Hg, a holding temperature of 30.0°C produced the most rapid development of the corn earworm, Heliothis zea (Boddie). However, oviposition and fertility were greater when the larvae and pupae were held at lower temperatures. Under constant temperature conditions, adults held at 25.6° and 22.2°C were both more fecund and more fertile than those held at 28.9° and 18.9°C. Incorporation of this high temperature (28.9°C) into a fluctuating temperature regimen had no measurable effects on egg production and hatch. A high temperature of 32.2°C in a variable temperature regimen lowered egg hatch for one group of adults but had no effect on an apparently healthier group.
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