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Eliminating mosquito breeding grounds


The best way to control mosquitoes around your home is to get rid of places they breed.

Standing water

  • Don’t allow any outside water to stand for more than seven days.
  • Cover rainwater barrels with mesh or screen.
  • Drill holes in the bottom of any unused containers so water can’t collect.
  • Remove or drain standing water from bird baths, discarded tires, flower pots, wheelbarrows, barrels or tin cans that are left outdoors.

Swimming or wading pools

  • Immediately remove any water that collects on pool covers. Use a shop vacuum or other submersible pump to remove the standing water. For an above ground pool, siphon off the water using a hose. Someone at a hardware store can help you make an inexpensive siphon and explain how to use it.
  • Make sure the pool’s pump is circulating water properly.
  • Turn over wading pools when not in use.
  • A larvicide product for domestic use containing Bti (Bacillus thuringiensis israelensis) can be purchased at hardware stores. Public Health encourages homeowners to remove the standing water rather than use a larvicide product. If you do use a larvicide, we recommend the product not be applied to the pool cover within two days prior of opening the pool. Please note: Product label instructions must be followed. Larvicide cannot be applied to catch basins or other waters that can drain off your private property.

Eaves and drains

  • Clear leaves and twigs from gutter, storm and roof gutters throughout the summer.
  • Make sure that drainage ditches are not clogged.
  • Check flat roofs frequently for any standing water.

 

Yard and lawn

  • Immediately throw away raked leaves and other decaying items such as apples or berries that fall from trees. If they aren’t being composted, place them in a closed container until you can dispose of them.
  • Turn over compost piles on a regular basis.
  • Fill in any low depression areas in lawns.
  • Remove areas such as dense shrubbery where mosquitoes breed and rest.
  • Let your neighbours know about potential mosquito breeding grounds on their property.

Inside your home

  • Make sure door and window screens fit tightly and do not have holes.
  • If there are no screens, keep doors and windows closed from early evening to dawn.

What about wetlands (i.e., swamps, and marshes)?

Wetlands do not pose a threat. Wetlands are systems that perform an integral part in the purification of surface and groundwater. They also maintain a fine balance of biological life that should not be disturbed by the use of pesticides or any other method of control for WNV.