Growth and Development of the Red Flour Beetle1 in Flour Supplemented with Eggs or Adults of the Indian Meal Moth2,3

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Abstract
Growth and development of the red flour beetle, Tribolium castaneum (Herbst), was determined in the laboratory at 28°C and 60% RH. When the flour was supplemented with dead eggs or adults of the Indian meal moth, Plodia interpunctella (Hübner), the red flour beetle larvae weighed an average 2.92±0.51 (SE) or 3.0±0.32 mg, respectively, after 15 days; larvae in unsupplemented flour weighed an average 1.51 ±0.20 mg. However, there was no difference in the maximum weights of the larvae. Larvae in flour supplemented with eggs had a mean developmental period of 19.1± 0.8 days, those in flour supplemented with moths required 20.0±1.0 days, and those in unsupplemented flour required 24.9±0.8 days. Supplemented diets did not influence pupal duration (6.4±0.4 days). Days to 50% adult emergence were 26, 27, or 32 for beetles in flour with eggs, moths, or no supplement, respectively.

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