The Town of Berthoud hopes to decrease the risk of human West Nile virus infection by spraying for mosquitoes.  The spraying is based on high levels of infected Culex mosquitoes trapped in Berthoud last week.

When & Where

The Town of Berthoud will be doing adult mosquito control on Monday July 24 and Tuesday July 25, weather permitting. Spraying will occur by fogging trucks on both Monday and Tuesday and will begin at 10 p.m. and be completed before sunrise. The application area will include major residential areas East of County Road 19 and West of County Line Road 1 in addition to areas South of County Road 14 (42nd St SW) and North of County Road 4E.

What is Being Sprayed

The Town’s contractor, Vector Disease Control International, will use a permethrin-based product to be applied in a fine mist.  The product utilized in these adult mosquito control applications is considered safe for humans and even used to treat head lice on children and kill fleas and ticks on pets.  However, residents interested in minimizing their exposure are encouraged to stay indoors and keep doors and windows closed for 30 to 60 minutes after spraying. It’s recommended that residents bring pets indoors as well. Residents can further minimize pesticide exposure by covering organic gardens, ponds, and water features with a cloth sheet or tarp.

Adult mosquito control has been going on for several weeks in Loveland, Timnath, Johnstown, Severance and Longmont, as well as in certain subdivisions that are sprayed by homeowners associations. Portions of Erie, Lafayette, Gunbarrel and Hygiene have been sprayed since early June.

You should remember to use the 4 D’s to help prevent West Nile virus:

  • DEET or other effective mosquito repellent - Use a mosquito repellent that has been proven to be effective against West Nile Virus-carrying mosquitoes.  DEET, Picaridin, Oil of Lemon Eucalyptus (also called p-menthane-3,8-diol or PMD) and IR3535 are recommended.
  • Dusk to Dawn - Avoid exposure during peak Culex mosquito feeding times, from dusk through dawn.
  • Dress - Wear long sleeves and pants to keep mosquitoes from biting.
  • Drain – Remove standing water in your yard or garden to minimize mosquito breeding areas.

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