Exposure of Helicoverpa punctigera pupae to extreme temperatures for extended periods negatively impacts on adult population dynamics and reproductive output.

Understanding the impact that heat stress has on critical life stages of an organism is essential when assessing population responses to extreme events. Heat stress may occur as repeated small-scale events or as a single prolonged event, which may cause different outcomes to the organism. Here, we subjected Helicoverpa punctigera (Wallengren) pupae to two temperatures (44.

Estimating the differences in critical thermal maximum and metabolic rate of (Wallengren) (Lepidoptera: Noctuidae) across life stages.

Temperature is a crucial driver of insect activity and physiological processes throughout their life-history, and heat stress may impact life stages (larvae, pupae and adult) in different ways. Using thermolimit respirometry, we assessed the critical thermal maxima (CT-temperature at which an organism loses neuromuscular control), CO emission rate (V́CO) and Q10 (a measure of V́CO temperature sensitivity) of three different life stages of (Wallengren) by increasing their temperature exposure from 25 °C to 55 °C at a rate of 0.25 °C min We found that the CT of larvae (49.