Boise County Resident Spray Days

Horseshoe Bend Spray Days: April 10th – 11th  9am-4pm at the Boise County Solid Waste & Noxious Weed Office on 203 Old Emmett Road.

Garden Valley Spray Days: April 24th – 25th  9am-4pm at the Boise County Road & Bridge Shop on Banks/Lowman Road.

Idaho City Spray Days: May 1st – 2nd  9am-4pm at the Road & Bridge Shop on Buena Vista Road.

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2026 Pesticide Disposal Dates   Sponsored by the Idaho Department of Agriculture.  Canyon County/Pickles Butte Landfill will offer pesticide disposal on April 21st 2026.  Located at 15500 Missouri Ave, Nampa, ID.  From 9:00am to 1:00pm.  For more information and other locations and dates please visit the attached flyer by clicking the below link:
PESTICIDE DISPOSAL INFORMATION

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Spotted Knapweed is one of the most prevalent noxious weeds in Boise County

Idaho Code Title 22 Chapter 24 (22-2407) States:

1. It shall be the duty and responsibility of all landowners to control noxious weeds on their land and property, in accordance with this chapter and with rules promulgated by the director.
2. The cost of controlling noxious weeds shall be the obligation of the landowner.
3. Noxious weed control must be for prevention, eradication, rehabilitation, control or containment efforts. However, areas may be modified from the eradication requirement if the
   landowner is a participant in a county-approved weed management plan or county-approved cooperative weed management area.
4. The landowner shall reimburse the county control authority for work done because of failure to comply with a five (5) day notice, as outlined in section 22-2405, Idaho Code.
5. If an article is infested with noxious weeds, it shall not be moved from designated premises until it is treated in accordance with the applicable rules, or in accordance with the written permission of a control authority.

Control of Noxious Weeds is the Landowner’s Responsibility

Idaho Code 22-2407. LANDOWNER AND CITIZEN DUTIES.

Idaho has 73 different species of weeds, which are designated noxious by state law.

+ Denotes Statewide Early Detection/Rapid Response Noxious Weed List.
Weeds identified within Idaho shall be eradicated during the same growing season as identified.

# Denotes Statewide Containment Noxious Weed List. Weeds listed in the containment noxious weeds list are known to exist in various populations throughout the state. Weed control efforts may be directed at reducing or eliminating new or expanding weed populations while know and established weed populations, as determined by the weed control authority, may be managed by any approved weed control methodology, as determined by the seed control authority.

*Denotes Noxious Weeds found in Boise County

Prohibited Genra.  Plants in this category are prohibited from the state and may not be sold or moved within the state.
Brooms:  Tagaste, Escabon or Tree Lucerne, Scotch Broom, French Broom or Spanish Broom.

Visit the below links for more information on Noxious Weeds and West Nile:

Idaho Noxious Weed Law

Invasive Species of Idaho.

West Nile Information.