Abstract

Experiments to determine the effect of different temperatures on the development of cysticercoids of Hymenolepis diminuta in Tribolium confusum yielded the following information. Development of infective cysticercoids is accomplished in 65 days at 15 °C and in 5 days at 37 °C. Temperatures above and below this range are unsuitable. At 10 °C the beetles die before development can be completed, and at 40 °C larval development is abnormal. For laboratory work, 30 °C appears to be most suitable. Periodic alternation of high and low temperatures will markedly influence the speed of development.

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