Cold tolerance of third-instar Drosophila suzukii larvae

被引:21
|
作者
Jakobs, Ruth [1 ,5 ]
Ahmadi, Banafsheh [2 ]
Houben, Sarah [1 ,3 ]
Gariepy, Tara D. [4 ]
Sinclair, Brent J. [1 ]
机构
[1] Univ Western Ontario, Dept Biol, London, ON N6A 5B7, Canada
[2] Tarbiat Modares Univ, Dept Entomol, Fac Agr, Tehran, Iran
[3] Univ Munster WWU, Inst Zoophysiol, Munster, Germany
[4] Agr & Agri Food Canada, Southern Crop Protect & Food Res Ctr, London, ON, Canada
[5] Univ Bielefeld, Dept Chem Ecol, Bielefeld, Germany
基金
加拿大自然科学与工程研究理事会;
关键词
Spotted wing drosophila; Cold tolerance; Chill susceptible; Overwintering; Phenotypic plasticity; Fluctuating thermal regimes; SPOTTED-WING DROSOPHILA; CHYMOMYZA-COSTATA; HEAT TOLERANCE; MELANOGASTER; SURVIVAL; ACCLIMATION; TEMPERATURE; PLASTICITY; EVOLUTION; INJURY;
D O I
10.1016/j.jinsphys.2016.10.008
中图分类号
Q96 [昆虫学];
学科分类号
摘要
Drosophila suzukii is an emerging global pest of soft fruit; although it likely overwinters as an adult, larval cold tolerance is important both for determining performance during spring and autumn, and for the development of temperature-based control methods aimed at larvae. We examined the low temperature biology of third instar feeding and wandering larvae in and out of food. We induced phenotypic plasticity of thermal biology by rearing under short days and fluctuating temperatures (5.5-19 degrees C). Rearing under fluctuating temperatures led to much slower development (42.1 days egg-adult) compared to control conditions (constant 21.5 degrees C; 15.7 days), and yielded larger adults of both sexes. D. suzukii larvae were chill-susceptible, being killed by low temperatures not associated with freezing, and freezing survival was not improved when ice formation was inoculated externally via food or silver iodide. Feeding larvae were more cold tolerant than wandering larvae, especially after rearing under fluctuating temperatures, and rearing under fluctuating temperatures improved survival of prolonged cold (0 degrees C) to beyond 72 h in both larval stages. There was no evidence that acute cold tolerance could be improved by rapid cold hardening. We conclude that D. suzukii has the capacity to develop at low temperatures under fluctuating temperatures, but that they have limited cold tolerance. However, phenotypic plasticity of prolonged cold tolerance must be taken into account when developing low temperature treatments for sanitation of this species. Crown Copyright (C) 2016 Published by Elsevier Ltd. All rights reserved.
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页码:45 / 52
页数:8
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