The Country Survey Mapper tool, developed by the University of Aarhus Denmark, displays rust field survey data. Selection of any specific combination of year and disease is possible. Any new data incorporated into the underlying database will automatically be displayed on the map. For more comprehensive queries please use the Global Survey Mapper. All USA data are published data from the USDA-ARS Cereals Disease Laboratory, Minnesota.
NB: All locations on the USA map represent county town centers, no actual survey field locations are given on the map. Only positive stem rust locations are included on the map.