Through surveys, this project will delineate the expanding range of a new invasive aphid, Metopolophium festucae cerealium (Mfc) in the Pacific Northwest. A known pest of cereal crops in its native range in the UK, this pest became abundant in wheat at many locations in the Pacific Northwest by 2011. The extent of its current distribution, whether it is spreading, and how much injury it causes will be assessed through the work of this project.