Annual Survey Maps -

This map only represents pest survey data submitted to the NAPIS database by participating states for the year selected. This is not a distribution map; the map only displays one year of survey data at a time. CERIS and USDA-APHIS-PPQ do not certify the accuracy or completeness of this map.

If you wish to cite this map, please use the following format:

• Center for Environmental and Research Information Systems (CERIS). Purdue University. "Survey Status of Hydrilla - Hydrilla verticillata ()." Retrieved from https://pesttracker.org/map.php?code=PCHAFBA