U.S. Department of Agriculture2017-06-012017-06-01http://hdl.handle.net/2097/35710Map of the United States where states and provinces have been affected by soybean aphids.Citation: U.S. Department of Agriculture. (2002). Soybean Aphid Watch. [Archived Webpage]. https://web.archive.org/web/20021207224825/http://www.pmcenters.org/Northcentral/Saphid/aphidindex.htmengCopyright for this item remains with the original copyright holder. This work has been made available under Section 107 of U.S. copyright law following a fair use evaluation.https://web.archive.org/web/20021207224825/http://www.pmcenters.org/Northcentral/Saphid/aphidindex.htmText