Mosquito Control Information/Methodology

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The City of Moorhead's mosquito control methodology/approach toward the aerial application of pesticides balances environmental responsibility and the prevention of serious diseases such as West Nile Virus, which is transmitted to humans by mosquitoes. The symptoms of West Nile Virus range from none to deadly.


Protect Yourself with the Four D's

  1. Drain: Mosquitoes breed in water. Drain any standing water in your yard each week. Bird baths, clogged gutters, and kiddie pools are common breeding sites.
  2. Dress: Wear lightweight, long-sleeved shirts and long pants while outdoors. Spray clothing with insect repellent since mosquitoes may bite through clothing.
  3. Defend: Apply insect repellent sparingly to exposed skin. Use an approved repellent according to its label. Find the repellent that is right for you.
  4. Dawn/Dusk: Limit time spent outdoors at dusk through dawn, when mosquitoes are most active and feeding.

Cass County Vector Control (the City of Moorhead's mosquito control contractor) utilizes several key metrics to determine its ground spraying schedule and also whether conditions involving the prevalence of West Nile Virus possibly call for aerial spraying. The following information gives a more in-depth look at some of these metrics and how property owners can opt out of spraying.

Trap Counts

Vector Control uses data from 40 different trap sites in Cass and Clay counties to determine if there is a need to spray for adult mosquitoes. When the threshold is hit, they utilize truck-mounted spraying and, if weather conditions are appropriate, they can recommend aerial spraying as well.

Current Trap Counts

Mosquito Spraying Alerts

In the event that Cass County Vector Control decides to spray for mosquitoes, you can sign up for community alerts. 

Check Spraying Schedule

Interactive Mosquito Surveillance & Control Map

The City of Moorhead's mosquito control contractor, Vector Control, has an interactive mosquito surveillance and control map.

View Map

Apply To Opt Out Of Spraying

Property owners can request to opt out of spraying operations. To apply, select the Ground ULV Exemption Request option and enter your address and contact information.

Apply to Opt Out