Voinovich, N. D., Vaghina, N. P., & Reznik, S. Y. (2013). Effects of cold shock on host egg parasitization by females of Trichogramma buesi Voegele (Hymenoptera, Trichogrammatidae). Entomological Review, 93(4), 405-411.

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The effects of cold shock (4°C for 18–24 h) on survival of Trichogramma buesi females, their fecundity, and the inclination to parasitize grain moth eggs were studied under laboratory conditions. Cold shock did not result in any significant change in the survival rate, whereas the fraction of females that parasitized grain moth eggs and the fecundity of these females slightly decreased. However, females which had already started oviposition before cold shock infested grain moth eggs much more frequently. In most insect species studied, cold shock results in a sharp decrease or even disruption of the effect of experience on the subsequent behavior. Thus, the results of this study suggest that “the effect of acquired experience” (a tendency to continue infestation of the particular host species) in Trichogramma females is based not on learning or not only on learning but on some other, possibly hormonal mechanisms.