Mosquito Prevention for Ornamental Ponds

The Health District Vector-Borne Disease Prevention Program staff are finding mosquitos breeding in many ponds in the area. Our staff usually treat the ponds initially with one of several products that kill mosquito larvae. These products are effective for about one month in suppressing larval mosquitos. If conditions are right, the staff may also recommend planting the pond with mosquito fish (Gambusia affinis), which are avid consumers of mosquito larvae. Ponds which are not appropriate for mosquito fish require some other type of continued treatment to prevent breeding mosquitos.

Our staff request that homeowners take responsibility for continuing mosquito prevention in their own ponds. Homeowners can take several steps to reduce the possibility of breeding mosquitos. These include:

  • Remove overhanging plants from the edge of the pond. These provide protection for breeding mosquitoes.
  • Remove algae from the pond by raking or use of copper sulfate. Mosquito larvae thrive in algae.
  • Line the edge of the pond with rock. This will inhibit plant growth.
  • Install a small fountain or aerator. The movement of the water interferes with egg-laying by female mosquitos. An aerator will also suppress mosquitos by improving general water quality.
  • Try using mosquito donuts for larval control. This is a product similar to one used by our staff for larval abatement. The donuts may be bought at hardware, nursery, and ornamental pond stores in the area.

Our staff are available to answer questions and provide consulting to assist you in finding long-term solutions to prevent mosquitos from breeding in your ornamental or stock pond.

Contact the Program
(775) 328-2434
(775) 328-6176  Fax