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In observance of Memorial Day, County offices will be closed Monday, May 30. For online services, visit our web page.

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Public Works

Noxious Weed Prevention

Preventions Plans

Prevention is the first line of defense to keep weeds from growing in an area. Planting high-quality, weed-free crops or grass seed is the basis for good land management. Plant competition is an effective way to prevent the invasion of noxious weeds and proper management of perennial grasses will inhibit the establishment of weeds. The most important preventative measure is to keep weeds from going to seed so that new infestations are prevented. Second, eradication is the removal of weeds from an area so they will not reoccur unless reintroduced.

Personalized Noxious Weeds Plans for County Residents

Noxious Weed staff will assist residents in identifying noxious weeds and control their spread by developing a noxious weed control plan for their property.   These plans will outline the most effective way to control noxious weeds on your property without damaging desirable vegetation and include control methods, herbicide recommendations, and short/long-term goals for infestation control.

Please contact the Noxious Weed staff to set up a property visit at 303-660-7480.

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Free Sprayer Calibration for Residents

Free Sprayer Calibration for Residents

No matter what size of tank you are using, your sprayer must be calibrated to achieve optimum noxious weed control. Many of the newer herbicides can kill grass if over-applied. To be properly calibrated, the speed of the vehicle must be consistent, tip sizes and spacing set properly, and pressure settings adjusted correctly. Even small hand sprayers need to be calibrated.  For more information, contact us at 303-660-7480.

Steps to follow for property calibration:

Steps to follow for property calibration:

  • Before a weed control staff member arrives, make sure your sprayer has been properly assembled and ready to operate.
  • Wear appropriate personal protective equipment, ie: shoes, socks, long sleeve shirt, long pants, chemical-resistant gloves, and eye protection.
  • Set aside one hour to observe the calibration process.
  • Have your sprayer half-filled with water.
  • Have the battery, pto, or pump engine hooked up and ready to run.
  • The sprayer must have a pressure gauge with adjustable bypass flow capability.
  • Test run the sprayer for 30 seconds to ensure it’s operational.
  • Observe the weed control staff testing the flow with the meter and plugging the numbers into the TeeJet software.
  • Understand the amount of the prescribed herbicide required per tank load of water/herbicide mix.
  • Know which herbicide to use and the proper timing for spraying each noxious weed.
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