Keep your yard from becoming a breeding ground for Mosquitoes.

March 31, 2014

Mosquitoes can lay eggs in any location that contains standing water.

Be sure to inspect your yard and property once every week and drain any standing water

And Don’t Forget To Check

  • Plant saucers
  • Uncovered boats
  • Water bowls for pets
  • Leaky hoses and faucets
  • Rot holes in trees


The NUMBER ONE thing

you can do to prevent

Mosquitoes is to NOT

give them a place to lay

their eggs and develop.


March 10, 2014

Public Notice of Mosquito Control Activities

The Skamania County Mosquito Control District will begin seasonal activities around March 31, 2014.   Only when mosquito larva is found will they use one of the following larvicides.

  1.  AquaBac G (Bacillus thuringiensis, subspecies Israelensis): specific for mosquito larva
  2. Altosid (S-Methoprene) a growth inhibitor active on early stages of mosquito larva
  3. Agnique (poly-alpha –w-hydroxy): a monomolecular surface film used for later stages of larva and pupa

Later in the season and only in those areas where adult mosquitoes reach thresholds as specified in District IMM plan or if mosquito transmitted disease is detected, will the district adulticide using:

  1.  Aqua Reslin (permethrin) which is fogged at a rate between 0.0015 and 0.007 ounces per acre.

Mosquito control activities will continue throughout the season until mid to late October depending on weather conditions

Phone or email the Mosquito Control District for further information or to report mosquito problems within District boundaries – (360) 904-4345 or .   Additional information and schedule changes  will be posted and updated on our website -  or



September 3, 2013

As summer comes to a close we are experiencing more rain.  As a result of more rain we have water collecting in containers around the house.  Please take a few minutes and dump all the containers around your yard.  Also, gutters, check your gutters.  As the leaves start to fall or fir needles and they land inside the gutter and you add a little rain water, this is a perfect mosquito habitat.

This mosquito season has been the first in six years we haven’t had the amount of flood water, which has been GREAT!  However, please remember it just takes a small amount of water for mosquitoes to lay their eggs, which can produce up words of 200 mosquitoes per hatching.



June 27, 2013

Please take a few minutes and dump any containers around your house and yard that have accumulated rain water from the past couple of weeks.  These containers are perfect  mosquito breeding habitat.  Also, bird baths are ANOTHER perfect environment for mosquito breeding.  Keep in mind that anything that holds water can and will breeding grounds for mosquitoes.

If possible keep your grass short and brush, trees, blackberry briars well-trimmed around your house and yard.   Mosquitoes will rest in taller vegetation and come out in the early morning and evening hours for a meal. 

We appreciate your help!


June 7, 2013

We need everyone to take a walk around your house and dump out any buckets, planters, tarps, gutters, etc that have water in them.  THESE ITEMS ARE MAJOR MOSQUITO BREEDERS.  PLEASE, PLEASE DON’T FORGET ABOUT THE TIRES AROUND YOUR PROPERTY.  Tires without any wheels in them are the major contributor of mosquitoes around a house.  Don’t forget tall grass.  Keeping your area well-trimmed helps a great deal.


April 2, 2013

The Skamania County Mosquito Control District has begun work on the 2013 mosquito season. The District will be actively performing mosquito control in District boundaries now until late September to mid October depending on weather conditions.

The District’s primary focus is to control mosquitoes when they are in the larval or pupal state using a larvicide product (we use BTI*).  Controlling mosquitoes when they are in the water is an effective approach because the mosquito is somewhat isolated and known breeding sites our recorded and routinely monitored.  Mosquito Larvicide applications are given top priority since this type of control is more selective and effective in reducing mosquito populations.  This type of mosquito control measure requires personnel, equipment, materials, planning, mosquito surveillance work and expense.  However, these types of applications offer the best long-term control for mosquitoes.

Information about ground fogging/spray activities will be posted as the season progresses.


Being aware of areas  mosquitoes like to breed can significantly reduce the mosquito population..   Please take a moment and review the items we have listed below, and then conduct an access of your home environment.  Any and all measures you DO  to help with will benefit you and your neighbors.

1. Yard waste, such as lawn cuttings and raked leaves, which are present in gutters or

storm drains, prevent water from flowing and create perfect breeding conditions for


2.  Low-lying depressions in lawn areas where water can collect should be filled in.

3.  Leaves and twigs can block roof gutters and eaves troughs and prevent proper water drainage

4.  Stagnant water of any kind is another breeding area for mosquitoes

5.   Open or broken window screens and attic vents offer perfect avenues for mosquitoes to make

their way into your home. Window screens should fit snugly into the frame, vents should

remain closed and for further prevention, windows should also be shut during the hours of dusk

and dawn.

6.  Pool covers can collect water and should be emptied right away. Wading pools need to also

be turned over when they are not in use.

7.   Toys and other objects around the yard should be placed in an area where they won’t collect


8.  Mosquitoes are often attracted to containers of standing water in wheelbarrows or tires that

are left outside. To avoid this, drill holes in the bottom of containers to allow water to flow out

or turn over those items that are not in use.

9.  Ornamental ponds or watering troughs are a perfect source for mosquito breeding.  They should

be cleaned on a weekly basis.

*Bacillus thuringiensis israelensis (Bti) ise used for mosquito larvicide and applied to mosquito breeding areas when mosquito larvae are found in the 1st to 3rd instar life stages.


March 27, 2013

Mosquito Life Cycle

The mosquito goes through four separate and distinct stages of its life cycle: Egg, Larva, Pupa, and Adult. Each of these stages can be easily recognized by its special appearance.

Egg : Eggs are laid one at a time or attached together to form “rafts.” They float on the surface of the water. In the case of Culex and Culiseta species, the eggs are stuck together in rafts of up to 200. Anopheles, Ochlerotatus and Aedes, as well as many other genera, do not make egg rafts, but lay their eggs singly. Culex, Culiseta, and Anopheles lay their eggs on the water surface while many Aedes and Ochlerotatus lay their eggs on damp soil that will be flooded by water. Most eggs hatch into larvae within 48 hours; others might withstand subzero winters before hatching. Water is a necessary part of their habitat.

Larva: The larva (plural – larvae) lives in the water and comes to the surface to breathe. Larvae shed (molt) their skins four times, growing larger after each molt. Most larvae have siphon tubes for breathing and hang upside down from the water surface. Anopheles larvae do not have a siphon and lie parallel to the water surface to get a supply of oxygen through a breathing opening.  The larvae feed on microorganisms and organic matter in the water. During the fourth molt the larva changes into a pupa.

Pupa: The pupal stage is a resting, non-feeding stage of development, but pupae are mobile, responding to light changes and moving (tumble) with a flip of their tails towards the bottom or protective areas. This is the time the mosquito changes into an adult. This process is similar to the metamorphosis seen in butterflies when the butterfly develops – while in the cocoon stage – from a caterpillar into an adult butterfly. In Culex species in the southern United States this takes about two days in the summer. When development is complete, the pupal skin splits and the adult mosquito (imago) emerges.

Adult: The newly emerged adult rests on the surface of the water for a short time to allow itself to dry and all its body parts to harden. The wings have to spread out and dry properly before it can fly. Blood feeding and mating does not occur for a couple of days after the adults emerge.

How long each stage lasts depends on both temperature and species characteristics. For instance the Culex tarsalis mosquito, might go through its life cycle in 14 days at 70° F and take only 10 days at 80° F. On the other hand, some species have naturally adapted to go through their entire life cycle in as little as four days or as long as one month.


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