CA State Parks Aquatic Invasive Plant Control Program FAV Update

Floating Aquatic Vegetation Control Program
Water Hyacinth ( Eichhornia crassipes), 
South American Spongeplant (Limnobium laevigatum), 
Uruguay Water Primrose (Ludwigia hexapetala), and
Alligatorweed (Alternanthera philoxeroides)
California Department of Parks and Recreation
Division of Boating and Waterways
Aquatic Invasive Plant Control Program (AIPCP)

         November 19 through November 21, 2018
We would like to inform you that our office will be closed for Thanksgiving on November 22-23. We will resume our treatment activities on November 26.
DBW Wishes you a Happy Thanksgiving! 

Herbicide treatment of invasive floating aquatic vegetation will begin on March 12, 2018 in various areas of the Sacramento -San Joaquin Delta. For more information see the Public Notice.
“Treatment sites and schedules are subject to change based on regulatory requirements, weather conditions, plant growth and movement, waterway traffic, listed fish presence surveys, and other conditions.”
  • Spraying will be conducted during the hours of 7am to 4pm weekly, Monday thru Friday.
  • Herbicide applications during the treatment period will utilize Glyphosate (Roundup Custom), 2,4-D (Weedar 64), and Imazamox (Clearcast)

Treatment Period:


Area 2-4: Mar. 1, 2018 – Nov. 30, 2018

Area 1: June 1, 2018 – Nov. 30, 2018

County References:
ALA – Alameda; CC – Contra Costa;
MER – Merced; SAC – Sacramento; SJ – San Joaquin;
STAN – Stanislaus; SOL – Solano; YOLO – Yolo

Since November 13, 2018, approximately 2,112 acres of water hyacinth, South American spongeplant, Uruguay water primrose and/or alligatorweed have been treated at 149 sites with 528 total treatments.
* Data are preliminary and subject to change.

 Southern Site Map


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