Copidosoma truncatellum: 1 Effect of Temperature on the Developmental Rate, Duration of Emergence, and Longevity 1

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Abstract
The developmental time of Copidosoma truncatellum (Dalman) in the host Trichoplusia ni (Hübner) was studied at 7 constant temperatures; 14.8, 20.2, 23.5, 2S.0, 28.9, 32.3, and 35.6°C. At temperatures of 14.8 and 28.9°C the times from egg to first adult emergence were 122.9 and 22.4 days; the durations of adult emergence from the host were 10.8 and 2.9 days; and the durations of a generation were 162.7 and 31.2 days, respectively. At 32.3°C, the parasitized host and the parasites died during the late instars of the host. At 35.6°C, the host eggs did not hatch. Longevity of adult female C. truncatellum fed on a diet of 20% levulose solution was 30.3 days at 14.8°C and 2.8 days at 35.6°C. An examination at 25°C shows synchronization of the parasite to host T. ni to be nearly perfect.

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