Welcome to the online home of Distribution Maps of Plant Diseases These maps are the authoritative source for accurate data on the worldwide distribution of plant diseases of economic or quarantine importance. First published in 1942 and created in association with the European and Mediterranean Plant Protection Organization (EPPO), we have now published over 1000 Disease Maps and they can be browsed, searched and used via this site. All maps can be browsed by date (below) and most can also be browsed by continent and by taxonomic group (left). Alternatively, enter the name of the species you are looking for in the search box below. To view the full list of published maps, including cross references from more recent preferred names and frequently encountered synonyms, please view the Index (above).