Adult plasticity of cold tolerance in a continental-temperate population of Drosophila suzukii.

作者: Ruth Jakobs , Tara D. Gariepy , Brent J. Sinclair

DOI: 10.1016/J.JINSPHYS.2015.05.003

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摘要: Abstract Drosophila suzukii (Matsumura) (Diptera: Drosophilidae) is a worldwide emerging pest of soft fruits, but its cold tolerance has not been thoroughly explored. We determined the strategy, low temperature thermal limits, and plasticity in both male female adult D. . reared flies under common conditions (long days, 21 °C; control) induced by rapid cold-hardening (RCH, 1 h at 0 °C followed recovery), acclimation (CA, 5 days 6 °C) or fluctuating temperatures (FA). had supercooling points (SCPs) between −16 −23 °C, were chill-susceptible. 80% control killed after −7.2 °C (males) −7.5 °C (females); CA FA improved survival this sexes, RCH did not. 70 h (male) 92 h (female) 0 °C, shifted to 112 h 165 h (females). entered chill coma (CT min ) approximately −1.7 °C, which was ca. 0.5 °C colder than flies; increased CT compared controls. Control exposed for 8 h took 30–40 min recover movement, reduced overwinter temperate habitats, suggest that could association with built structures, there may be additional imparted developmental plasticity.

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