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United States Department of Agriculture

Agricultural Research Service

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The Exotic and Invasive Weeds

Research Unit

 Yellow Starthistle - An example of a Rangeland weed  An example of an Aquatic weed  Saltcedar - An example of a Riparian weed

Welcome to the Exotic and Invasive Weeds Research Unit.  We develop new methods for managing invasive plant species in rangeland, riparian, and aquatic ecosystems.  This Unit uniquely incorporates skills of scientists and technicians from three distinct geographic locations: Albany, California (headquarters); and Davis, California.


  • Directions to our site locations: Albany, CA; Davis, CA (external links to Google Maps).
  • For information about what we do and our mission, select About Us.
  • To meet our scientists and staff, select People & Places.
  • To see our formal research projects, select Research.


Weed Research Activities


EIW Special Unit Facilities

  • Quarantine
  • Remote Sensing Lab
  • Seed Lab


 Ludwigia hexapetala 




Last Modified: 4/17/2017
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