Eur. J. Entomol. 96 (2): 175-181, 1999

Cold tolerance strategy of the freeze-intolerant chrysomelid, Aulacophora nigripennis (Coleoptera: Chrysomelidae), in warm-temperate regions


We investigated the physiological adaptations for winter survival in a freeze-intolerant chrysomelid, Aulacophora nigripennis, in warm-temperate regions. The adults showed a decreased supercooling point (SCP), increased chill tolerance and high myo-inositol content during winter. Chill tolerance at 0C appears to be a more suitable indicator of their cold hardiness than SCP because they die at 0C without freezing and normally an not exposed to subzero temperatures below their SCP (

Keywords: Chrysomelidae, Aulacophola nigripennis, hibernation diapause, cold hardiness, chill tolerance, freeze-intolerant, supercooling point, cryoprotectant, myo-inositol, juvenile hormone analogue

Accepted: December 21, 1998; Published: June 30, 1999

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