Delta Region Areawide Aquatic Weed Project
Delta Region Areawide Aquatic Weed Project
Delta Region Areawide Aquatic Weed Project
University of California
Delta Region Areawide Aquatic Weed Project


NASA Ames Research Center
USDA-ARS Invasive Species and Pollinator Health Research Unit 
California Dept of Parks & Recreation - Division of Boating & Waterways
California Dept of Food & Agriculture
Sacramento-San Joaquin Delta Conservancy
University of California, Davis
Local mosquito vector control districts
General areas of study
Weed mapping tools
Management techniques and strategies
Weed effects on ecosystems, native plants, and water quality
Biological control agents
Effects of weeds on mosquito populations
Bio-economic modeling of weed control costs and project benefits


UC Weed Science blog

Goats & aquatic weeds Goats seen eating aquatic weeds
In late October we made our monthly trip to sample curlyleaf pondweed in the Sacramento-San Joaquin Delta. On an island in the lower San Joaquin river, we spotted goats eating waterhyacinth (Eichhornia crassipes) and waterprimrose (Ludwigia sp.) along...

Water primrose along the American River. Biological control of invasive water primroses
Exotic water primroses (Ludwigia spp.) are aggressive invaders in both aquatic and riparian ecosystems. The plants form dense mats over the water surface. These mats constrain navigation and interfere with recreational activities, irrigation, drainage,...

The arundo wasp curls its abdomen as it prepares to ‘sting’ or lay eggs in an arundo shoot tip. Arundo wasp, a biocontrol agent, is established and spreading in Delta watersheds
Arundo or giant reed (Arundo donax) is invasive in riparian areas in much of central and southern California, as well as other parts of the U.S. In the Sacramento-San Joaquin Delta, arundo grows on islands and along the edges of sloughs and canals. It is...


DRAAWP participants are submitting papers to be included in a DRAAWP-themed issue of the Journal of Aquatic Plant Management, early 2020.

The next Aquatic Plant Management Society annual meeting will be July 19-22, 2020, in San Antonio, TX.

UC Davis Aquatic Weed School will return September 2-3, 2020.

Our DRAAWP informational brochure is available from the Site Navigation tab at the left.

Progress Reports (February 2018) are available under the Products tab.



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