Variable Isotopic Compositions of Host Plant Populations Preclude Assessment of Aphid Overwintering Sites Supplementary Table S1. Buckthorn sample locations.
State IA IL IL IL IL IN MI MI MI MN MN OH WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI
County Winneshiek Kane Rock Island Rock Island Will Noble Hillsdale Kalamazoo Lenawee Redwood Redwood Lucas Adams Adams Adams Barron Brown Buffalo Buffalo Calumet Calumet Chippewa Columbia Columbia Columbia Crawford Dane Dane Dane Dane Dane Dodge Dodge Dunn Eau Claire Fond du Lac Grant Green Green Green Lake Iowa
WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI WI
Jackson Jackson Jefferson Juneau Kenosha La Crosse La Crosse Lafayette Manitowoc Marathon Marquette Milwaukee Monroe Ozaukee Pepin Pierce Polk Portage Racine Rock Saint Croix Sheboygan Sheboygan Treampealeau Treampealeau Vernon Walworth Washington Waukesha Waukesha Waupaca Waushara