Location: Soil, Water & Air Resources ResearchTitle: Distribution and phenology of the brown maramorated stink bug in light of climate change
Submitted to: USDA Interagency Forum on Invasive Species
Publication Type: Abstract Only
Publication Acceptance Date: 1/2/2018
Publication Date: N/A
Technical Abstract: The invasive brown marmorated stink bug, Halyomorpha halys (Stål; Hemiptera: Pentatomidae), has recently emerged as a harmful agricultural pest in North America and Europe. This highly polyphagous insect has over 300 reported host plants, including important horticultural crops. Originally from East Asia, this pest is spreading rapidly worldwide. As with many invasive insects, climate is likely the dominant force determining H. halys distribution and densities in its invaded range given the lack of natural enemies and an abundance of suitable host plants. Climate change will add further complications to managing this species in terms of both geographic distribution and population growth. This study used CLIMEX, to compare potential H. halys distribution under recent and future climate models using one emission scenario (A2) with two different global circulation models, CSIRO Mk3.0 and MIROC-H. Simulated changes in seasonal phenology and voltinism were examined. On a global scale, potential H. halys range expanded polewards and contracted from its southern temperature range limits under future climate scenarios. All future climate scenarios explored here suggest that the invasion threat posed to Europe and Canada will greatly intensify. Prolonged periods of warm temperatures resulted in longer growing seasons. However, future climate scenarios also indicated that rising summer temperatures decrease H. halys growth potential compared to recent climatic conditions, which in turn, may reduce mid-summer crop damage. Climate change may increase the number of H. halys generations produced annually, thereby enabling the invasive insect to become multivoltine in the northern latitudes of North America and Europe where it is currently reported to be univoltine. Model projections suggest that prime horticultural production areas in Europe, northeastern United States, and southeastern Canada are at greatest risk from H. halys under both recent and possible future climates. The results of this study can inform biosecurity planning and pest management by identifying regions of increasing as well as decreasing risk from H. halys in light of climate change.