US Army Corps of Engineers
Jacksonville District Website

Treatment Schedules

Treatment schedules are prepared to inform the public about herbicide applications. The schedules are posted at fish camps, boat ramps and marinas and are supplied to individuals via email upon request.

St. Johns River Treatment Schedule

Treatment Date and Areas:

September 28, 2020  -  October 1, 2020                      

Spray operations will be conducted by USACE personnel on the St. Johns River from Powell's fish camp to Palatka Memorial Bridge, including Lake George, Little Lake George and all associated creeks, tributaries.  As always this schedule is tentative and subject to change due to weather and any issues that may arise.

Herbicide Information: Foliar treatments for floating plants are conducted with Diquat, 2,4-D, Penoxsulam, Carfentrazone, Imazamox, Triclopyr, Flumioxazin, Imazapyr, and/or Glyphosate.
Special Instructions: Areas spot treated with Diquat should not be used for 1 day for drinking water, livestock and domestic animal watering or irrigation of non-food crops and 5 days for food crops. There are no restrictions for Glyphosate treated areas except for a 48-hour waiting period within 0.5 mile of an active potable water intake (drinking water).
Note: Generally, 2,4-D will be used only in areas where water intakes are at least 0.5 miles or more away from the treatment site. If treatment occurs within 0.5 mile of a water intake the treated sites will be posted with signs stating that there is a 3-week restriction for irrigation and potable water use.
For additional information, call the Palatka Field Office of the Invasive Species Management Branch at 386-328-2737 or 904-264-1273.

Lake Okeechobee Treatment Schedule

Treatment Date:

Schedule of Operations:

Enter waterbody name
 (ex: Okeechobee)

Current Lake Level: Click for Lake Okeechobee Levels
Treatment Areas:


Florida Fish and Wildlife Conservation Commission

Schedule of Operations:

Enter waterbody name
 (ex: Okeechobee)

The Schedule of Operations summarizes plant control that FWC contractors and field biologists have proposed to accomplish for the following 1-2 weeks. The schedule shows types of plants and estimated amounts that the contractor plans to control along with control methods for a particular waterbody. Conditions such as rain, high winds, or equipment failures can result in some or all of this planned work not being completed in which case it will be rescheduled for a future date. The Schedule of Operations for a particular period may include several waterbodies. In some instances, more than one contractor may be scheduled to work on the same waterbody but on different plant species, in different areas, or utilizing a different control method.

Lake Okeechobee Aquatic Plant Management Interagency Task Force:


Target Plants


Water Hyacinth        



For additional information, speak with one of our biologists in the South Florida Operations Office in Clewiston at 863-983-8101.                

Areas of Operation

North Florida Aquatic Plant Field Unit — St. Johns RiverMap of Fla.

Cypress along the St. JohnsThe St. Johns River originates from broad marshlands about 25 miles north of Lake Okeechobee. This northbound river flows 300 miles until it empties into the Atlantic Ocean at Mayport, near Jacksonville.

The St. Johns River originates from broad marshlands about 25 miles north of Lake Okeechobee. This northbound river flows 300 miles until it empties into the Atlantic Ocean at Mayport, near Jacksonville.

South Florida Operations Office — Lake Okeechobee, the Okeechobee Waterway & Associated Tributaries

Lake OkeechobeeLake Okeechobee and the Okeechobee Waterway are located in central and southern Florida. The 451,000-acre lake and 154 mile long waterway extend from the Atlantic Ocean at Stuart, to the Gulf of Mexico at Ft. Myers. The waterway runs through Lake Okeechobee and consists of the Caloosahatchee River to the west of the lake and the St. Lucie Canal east of the lake.


Operations History

The Federal Aquatic Plant Control Program was initiated by the Rivers & Harbors Act of 1899. To see more details of the history of this program click on the following links: