Mosquito & Chemical Application Hotline

Updated May 24, 2018 4:00 pm


West Nile Virus Risk: Level 1 (Low Risk)

Adult Mosquito Fogging:

Date and Time of Next Application- N/A

Chemical:Zenivex E4 RTU

Larval Mosquito Control:

Applications will be occurring in wetland and irrigated in and around Laramie as larva is located.

City of Laramie Mosquito Control has scheduled the aerial application of Bacillus thuringensis israelensis (Bti) for Saturday, May 26th. A back-up date of Sunday, May 27th  has been set if conditions do not allow for the application to take place on Saturday, May 26th. This application of biological larvicide is targeted to control nuisance mosquito larvae in irrigated areas and floodwater southwest of Laramie. Areas to be treated include; acreages along the Big Laramie River from 3 miles south west of City limits to approximately 10 miles southwest of Laramie.

The bacteria is environmentally friendly and does not harm birds, fish, amphibians, mammals or other aquatic insects. The application is scheduled to begin at daylight and should conclude by late afternoon.  If inclement weather prohibits the application, it will be re-scheduled for Thursday morning June 1st the same time.  No application will be made within the City limits.

Chemical: Aquabac XT (Bti- Bacillus thuringiensis subspecies israelensis)


Noxious weeds: N/A


Broadleaf Weeds: Tueday, May 29th 

Location(s): Cowboy Field, Little League Fields

Chemical: Speedzone

Non- Selective vegetation control: N/A


Chemical: Rodeo

Applications will begin at 5:00am. 

All applications are on a weather permitting basis.

Hotline information regarding chemical applications on City owned properties will be updated daily at 4pm. Call 721-5056 or click on the Mosquito and Chemical Application hotline tab on the City of Laramie home page. 

All applications are on a weather permitting basis.

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