HYDRILLA
Nonindigenous Aquatic Species-Hydrilla: U.S. Geographic Survey (USGS) 
    http://nas.er.usgs.gov/plants/docs/hy_verti.html
This site provides very useful and comprehensive information about hydrilla, including origin, distribution, control methods, maps and references. 

King County, WA Noxious Weed Control Program

    http://dnr.metrokc.gov/wlr/waterres/smlakes/hydrilla.htm
This page includes brief history, method of spread, control, and identification.

The Perfect Aquatic Weed-Hydrilla verticillata: University of Florida
   
http://plants.ifas.ufl.edu/hydcirc.html
This page includes introduction, detailed identification with pictures, description, biology and physiology, and management.

Boater Alert: Hydrilla: California  Department of Boating and Waterways
    http://www.dbw.ca.gov/Hydrilla.htm
This site contains description and control methods of hydrilla

Prohibited Aquatic Plants- Florida
    http://aquat1.ifas.ufl.edu/prohib.html 
This page contains a list of all of the prohibited plants in the state of Florida. It also contains links to other sites with further information on these prohibited plants.

Biocontrol of Hydrilla: University of Florida
    http://aquat1.ifas.ufl.edu/hydrill.html 
This page contains general background information on hydrilla.  It also contains many images of various types and species of hydrilla.

TEKTRAN Invasive Species Research Agricultural Research Service: Hydrilla Research 
    http://www.nal.usda.gov/ttic/tektran/news/hydrilla.htm 
 This site contains 28 research articles.

The U.S. Army Engineer Waterways Experiment Station (WES)    

    http://www.wes.army.mil/el/aqua/apis/mechanical/hydrilla.html

This site provides a list of mechanical control methods, such as hand cutters, harvesting, rotovation, bottom barrier, and diver dredge.

Hydrilla: Aquatic Plant Management Society Plant Fact Sheet
   
http://www.apms.org/plants/hydrilla.htm
This fact sheet includes general and brief information about hydrilla.

Lake County California  Water Resources Division Hydriall Monitoring
   
http://watershed.lake-coe.k12.ca.us/topics/hydrilla/

Aquatic Plant Information System Online Version
    http://www.wes.army.mil/el/aqua/apis/methods.html
This page provides the following information on five aquatic plants (alligatorweed, eurasian watermilfoil, hydrilla, waterhyacinth, and waterlettuce): plant information, control methods, and ecology. 


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