Cold Tolerance of Adult Spotted and Banded Cucumber Beetles (Coleoptera: Chrysomelidae)
- 1 December 1989
- journal article
- research article
- Published by Oxford University Press (OUP) in Environmental Entomology
- Vol. 18 (6) , 1112-1116
- https://doi.org/10.1093/ee/18.6.1112
Abstract
Spotted and banded cucumber beetles, Diabrotica undecimpunctata howardi Barber and D. balteata LeConte, cold-acclimated and nonacclimated, shared a common range of supercooling points (−12 to −14°C); however, LD 50 values showed that cold-temperature survival of the spotted cucumber beetle was higher relative to the banded cucumber beetle as the exposure temperature approached O°C. A considerable portion (41.5%) of spotted cucumber beetle adults survived ambient conditions during the winter of 1988 at Charleston, S. C, whereas all adults of the banded cucumber beetle died. Reproductive diapause did not contribute to cold hardiness in the spotted cucumber beetle, but cold acclimation increased survival to exposures of −10°C in both species.Keywords
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