Stress for invasion success? Temperature stress of preceding generations modifies the response to insecticide stress in an invasive pest insect
Version of Record online: 7 SEP 2012
© 2012 The Authors. Evolutionary Applications published by Blackwell Publishing Ltd.
This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
Volume 6, Issue 2, pages 313–323, February 2013
How to Cite
Piiroinen, S., Lyytinen, A. and Lindström, L. (2013), Stress for invasion success? Temperature stress of preceding generations modifies the response to insecticide stress in an invasive pest insect. Evolutionary Applications, 6: 313–323. doi: 10.1111/eva.12001
- Issue online: 18 FEB 2013
- Version of Record online: 7 SEP 2012
- Manuscript Accepted: 11 JUL 2012
- Manuscript Received: 13 DEC 2011
- Academy of Finland. Grant Number: 118456
- Centre of Excellence in Evolutionary Research and Konnevesi
- adaptive phenotypic plasticity;
- cross-generational effect;
- invasive species;
- species range;
- stress tolerance;
- sub-lethal effects
Adaptation to stressful environments is one important factor influencing species invasion success. Tolerance to one stress may be complicated by exposure to other stressors experienced by the preceding generations. We studied whether parental temperature stress affects tolerance to insecticide in the invasive Colorado potato beetle Leptinotarsa decemlineata. Field-collected pyrethroid-resistant beetles were reared under either stressful (17°C) or favourable (23°C) insecticide-free environments for three generations. Then, larvae were exposed to pyrethroid insecticides in common garden conditions (23°C). Beetles were in general tolerant to stress. The parental temperature stress alone affected beetles positively (increased adult weight) but it impaired their tolerance to insecticide exposure. In contrast, offspring from the favourable temperature regime showed compensatory weight gain in response to insecticide exposure. Our study emphasizes the potential of cross-generational effects modifying species stress tolerance. When resistant pest populations invade benign environments, a re-application of insecticides may enhance their performance via hormetic effects. In turn, opposite effects may arise if parental generations have been exposed to temperature stress. Thus, the outcome of management practices of invasive pest species is difficult to predict unless we also incorporate knowledge of the evolutionary and recent (preceding generations) stress history of the given populations into pest management.