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Fig. 1. Course of air temperatures in the field (A) and the temperature protocol
used for laboratory acclimation (B) of Pyrrhocoris apterus. The adult
insects were sampled on 23 October and 27 December in the field. Laboratory
adults were maintained under short days conditions (12 h:12 h, L:D). Their
physiological state was considered as the initial state when they reached age
of 4 weeks. Three different treatments were then applied: progression of
diapause, desiccation, and cold acclimation (see text for detailed
descriptions).
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