AUTHOR=Chanthy Pol , Martin Robert J., Gunning Robin V., Andrew Nigel TITLE=The effects of thermal acclimation on lethal temperatures and critical thermal limits in the green vegetable bug, Nezara viridula (L.) (Hemiptera: Pentatomidae) JOURNAL=Frontiers in Physiology VOLUME=3 YEAR=2012 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2012.00465 DOI=10.3389/fphys.2012.00465 ISSN=1664-042X ABSTRACT=

According to geographical distribution, Nezara viridula (Heteroptera: Pentatomidae) can be found across tropical, subtropical, and temperate regions and this pattern is assumed to reflect differences in thermal adaptation, particularly in cold tolerance. Here the lethal temperature (LT) and critical thermal limits (CTL) (thermal tolerance) are examined for N. viridula. The upper LT for N. viridula at two contrasting climate locations (Breeza and Grafton, New South Wales, Australia) was 40.3°C with 20% survival under the stress of high temperature. The lower LT did not differ between these two populations and was −8.0°C with 20% survival under low temperature stress. Survival of N. viridula increased after acclimation at high temperature for 7 days. In contrast, when acclimated at lower temperatures (10 and 15°C), survival of Breeza and Grafton N. viridula was lower than 20% at −8.0°C. Control-reared N. viridula adults (25°C) had a mean CT_MinOnset (cold stupor) of 1.3 ± 2.1°C and a mean CT_Max (heat coma) of 45.9 ± 0.9°C. After 7 days of acclimation at 10, 20, 30, or 35°C, N. viridula adults exhibited a 1°C change in CT_Max and a ~1.5°C change in CT_MinOnset. CT_Max and CT_MinOnset of Breeza and Grafton N. viridula populations did not differ across acclimation temperatures. These results suggest that short-term temperature acclimation is more important than provenance for determining LTs and CTL in N. viridula.