What conditions warrant mosquito spraying and what conditions do not? 

The following conditions warrant mosquito spraying:

  • Ambient temperature is at or above 50 degrees F.
  • Wind speed is below 10 miles per hour.
  • It is not raining.

 If any of these conditions are not met, spraying will not be done on that particular evening. Spraying will be done again on the next scheduled day.


Where do you spray for mosquitoes?

Our Mosquito Control Program manages areas within the "Park County Mosquito District". Please reference the District Map in the left toolbar of this page for more information.


What are you spraying?

Our current program is primarily focused around 'Adulticide.' Adulticide is insecticide that is specific to killing adult mosquitoes.

  • Current adulticide product: MasterLine Kontrol 4-4
  • Specimen Label (Product label)
  • SDS


What is mosquito habitat?

In general, ideal mosquito habitat is any location and/or artificial container that collects and holds shallow, standing water, typically for more than several days.

This includes but is not limited to:

  • bird baths
  • tires
  • flower pots
  • gutters
  • ponds
  • irrigation ditches
  • boat covers
  • marshes & flooded fields and pastures
  • slow moving creeks and streams


What can I do as a landowner to help reduce mosquito infestations?

Long-term mosquito control is most effective on a community wide scale. This is due to the mobility of the insects and their prolific hatching behavior. If one landowner takes it upon themselves to mitigate mosquito habitat and treat any eggs or larvae on their property, they will most likely not experience a reduction in mosquito populations or activity because of the  mosquito habitat and hatching/development sites located in the surrounding area. "Property Sanitation", in this context, refers to physical control efforts that can be performed by property owners to aid in the reduction and elimination of ovipostional (sites where eggs are laid) and larval habitat, thus reducing the need to apply insecticide.

Some of these sanitation practices include, but are not limited to:

  • Remove or destroy any materials on your property that collect and hold water (examples: old tires, tin cans, buckets, unused swimming pools)
  • Clean debris from rain gutters 
  • Remove any standing water from flat surfaces
  • Fix any leaks that may be creating puddles OR fill and/or drain puddles
  • Remove, drain or fill tree holes and stumps with mortar
  • Change water in birdbaths and pools once a week. 
  • Drain any trapped water in tarps, boat covers, unused pools, ect. 

Goal:  To eliminate and prevent any sources of standing water that creates ideal mosquito habitat

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