Noxious Weed Control District

The Integrated Management sheets below provide practical, species‑specific guidance using an integrated approach to weed control. These resources were developed by Big Sky Watershed Corps member Lilly Nix to support landowners, land managers, and field crews with effective, science‑based management strategies.

Black Henbane(PDF, 395KB)

Blueweed(PDF, 257KB)

Canada Thistle(PDF, 461KB)

Cheatgrass(PDF, 370KB)

Common Buckthorn(PDF, 375KB)

Common Burdock(PDF, 349KB)

Common Mullein(PDF, 513KB)

Common Tansy(PDF, 364KB)

Dalmatian Toadflax(PDF, 281KB)

Diffuse Knapweed(PDF, 482KB)

Dyer's Woad(PDF, 397KB)

Field Bindweed(PDF, 311KB)

Garlic Mustard(PDF, 289KB)

Hoary Alyssum(PDF, 313KB)

Houndstongue(PDF, 222KB)

Knotweed Complex(PDF, 495KB)

Kochia(PDF, 331KB)

Leafy Spurge(PDF, 489KB)

Meadow Hawkweed(PDF, 364KB)

Medusahead(PDF, 353KB)

Musk Thistle(PDF, 307KB)

Orange Hawkweed(PDF, 465KB)

Oxeye Daisy(PDF, 315KB)

Perennial Pepperweed(PDF, 411KB)

Purple Loosestrife(PDF, 470KB)

Rush Skeletonweed(PDF, 376KB)

Russian Knapweed(PDF, 565KB)

Russian Olive(PDF, 289KB)

Russian Thistle(PDF, 365KB)

Saltcedar(PDF, 346KB)

Scotch Broom(PDF, 348KB)

Spotted Knapweed(PDF, 407KB)

St. Johnswort(PDF, 313KB)

Sulfur Cinquefoil(PDF, 191KB)

Tall Buttercup(PDF, 210KB)

Tansy Ragwort(PDF, 317KB)

Ventenata(PDF, 363KB)

Whitetop(PDF, 429KB)

Yellowflag Iris(PDF, 370KB)

Yellow Starthistle(PDF, 400KB)

Yellow Toadflax(PDF, 361KB)

Our District is here to help, some resources we can provide include:

• Property inspections & weed management plan development for your property.
• Cost Share Program.
• Equipment/Sprayer Rentals.
• Resources such as a listing of licensed & insured commercial applicators.
• Our office has multiple resources for weed related questions, as well as plant identification.

District Resources Pamphlet(PDF, 743KB)

Biological Control Pamphlet(PDF, 307KB)

Rooted in Restoration Guide(PDF, 560KB)

What_Are_Noxious_Weeds.pdf(PDF, 33KB)

Did_You_Know.pdf(PDF, 702KB)

FAQ_s.pdf(PDF, 85KB)

•  Our office accepts Noxious Weed Complaints/NonCompliance reporting from April - October, during the active growing and spray season. To make a complaint please review the information below and contact us with the required information by phone at (406) 447-8372 or e-mail.

1. Be prepared to provide your name and contact information, anonymous complaints cannot be received.
2. Provide a physical address or general location in conjunction with a physical address of the alleged complaint.
3. Keep in mind, your information may be shared to the landowner upon their request during a noncompliance case.
4. Our office can only enforce management of Montana State & Lewis and Clark County listed Noxious Weeds(PDF, 279KB). Common plants such as mustard varieties, grasses, and other roadside plants that seem too high and in need of being mowed, or nuisance weeds such as dandelions, although obnoxious are not noxious and management cannot legally be enforced. 

• Compliance and Legal Management of Noxious Weeds may include any, or a combination of the following methods:

1. Mowing/Cutting (with proper disposal of the noxious weeds).
2. Pulling (with proper disposal of noxious weeds).
3. Use of Herbicides; self sprayed or by a commercial applicator is accepted. 
4. Other; such as biological control methods.

Agendas - click here to be directed to the agenda location.

For Landowners: Noxious Weed Compliance FAQ(PDF, 218KB)

For Neighbors and Complainants: Noxious Weed Complaint FAQ(PDF, 185KB)

Montana & County Noxious Weed List(PDF, 279KB)

• Licensed Commercial Applicators List(PDF, 223KB)
• Seed Retailers(PDF, 184KB)
• Herbicide Retailers(PDF, 171KB)
• Prevention, Control and Eradication Education(PDF, 56KB)
• Pesticide Efficiency and Water Quality Information & Education(PDF, 896KB)- Department of Ag.
• Pesticide Performance and Water Quality(PDF, 495KB) - MSU Extension  

Lewis and Clark County Noxious Weed Division has a variety of rental equipment available. For questions or Drill reservations please call 406-447-8372.

• Herbicide Sprayers: No Reservations, First Come First Serve
       Pull Trailer & Slide In Units: $40 Day / $60 Weekend
       Backpack Sprayers: $10 Day / $20 Weekend
       ATV Hand Line: $20 Day / $40 Weekend

• Insecticide Sprayer: No Reservations, First Come First Serve
       Pull Trailer: $100 Day / $200 Weekend

• Drill Seeder: Reservations required
       $100 Day / $150 Weekend

Rental Equipment is available Monday-Thursday 8:00 am - 5:00 pm only, Friday pick up is unavailable.

Weekend rate is Thursday afternoon to Monday morning.

Rental Equipment and Fees(PDF, 191KB)
Sprayer Rental Instructions - Herbicide(PDF, 639KB)
Rental Sprayer Instructions - Insecticide(PDF, 15KB)
Dew Drop Seeder Instructions(PDF, 599KB)

Volunteer Compliance Proposal Form(PDF, 141KB)

5-Year Noxious Weed Management Plan Form(PDF, 677KB)

Landowner Roadside Weed Control Permit Form(PDF, 399KB)

Cost Share Program Form & Documents(PDF, 278KB)