The brown marmorated stinkbug, Halyomorpha halys Stål, is a polyphagous invasive species that was first found in the United States in 1998 in eastern U.S. but became a major agricultural pest in 2010. One major factor in allowing invasive species to establish and grow in a new region is the range is environmental temperatures that region experiences. However, in order to determine those areas where an invasive species might establish, it is essential to understand the metabolic response of all the life stages to temperature. Differential scanning calorimetry is a useful tool to monitor living organism’s metabolism at different temperatures and provides vital information related to the ability of the species to survive in novel environments. The information obtained from isothermal and scanning calorimetric experiments on all the life stages of H. halys indicated that the third instar was the most thermotolerant stage and that the eggs and fifth instar were the least thermotolerant. Additionally, the values for lower, optimal, and upper developmental temperatures were very close to those values reported by others using laboratory and field data to develop degree-day models. The significance of the relationship between metabolic rates and degree day models are discussed.
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