Weed and Pest Department

SupervisorStop Thistles Now
Steve Molengraaf

Weed Shed Building location:
1221 10th St. NW
Watertown, SD 57201

Mailing Address
14 1st Ave. SE
Watertown, SD 57201

Phone (605)882-5386 Office
Phone (605)882-6255 Alternate Number
Email Email Weed/Pest Department

Hours of Operation 8:00 A.M. to 4:30 P.M.

The Weed and Pest Superintendent’s job is to control all state and local noxious weeds; respond to infestation complaints; input and recommend control measures; and control noxious weeds on county, state, and interstate roads, right-of-ways, and other easements. Distribute flea beetles for the control of leafy spurge and mapping the distribution.

State Noxious Weeds

  • Canada Thistle
  • Leafy Spurge
  • Perennial Sowthistle
  • Hoary Cress
  • Salt Cedar
  • Absinth Worm Wood
  • Purple Loosestrife

Local Noxious

  • Musk Thistle
  • Plumeless  Thistle
  • Bull Thistle

Public Notices

2022 Spray Notification 

Notice of Responsibility to Control Noxious Weeds and Declared Pests – 2022 


March 6, 2023 Meeting Agenda  

Weed Board Members

Jim Thyen

Bret Henricks

Arlen Boehnke

Chris Coplan

Jon Kahnke

Ron Moehring

Liaison – Charlie Waterman

Helpful Links

South Dakota Weed & Pest

SDSU Weed Management

SD Department of Agriculture

iGrow Noxious Weed Control