How to Control Mosquitoes around Your Backyard Pond

To control mosquitoes in your home, you will have to manage the insects outside your house first. Mosquitoes may carry dangerous diseases for humans such as malaria or the West Nile virus, which can lead to encephalitis. Mosquitoes may gather around your backyard pond, as they are attracted by water and the females are very likely to lay eggs in this area. You may control mosquitoes around your pond through a regular maintenance.

You Will Need:

  • Goldfish, koi and mosquito fish
  • Rubber gloves to clean the pond
  • Scissors for trimming landscape
  • Tarp to cover the pond
  • Chlorine neutralizers
  • Petroleum oil

Step 1 – Buy Fish for the Pond

Populate your pond with fish that will eat the mosquitoes, eggs and pupae. The most common types of fish that effectively remove mosquitoes include:

  • The mosquito fish, also known as Gambusia affinis
  • Goldfish, or Carassius auratus auratus
  • Koi, which is a domesticated Cyprinus carpio

The mosquito fish may be provided for free by the city in some areas. The fish can eliminate mosquitoes, provided they are healthy and hungry, so make sure you only feed them limited amounts of food or no food at all when you notice mosquito larvae on your pond.

Step 2 -- Trim Pond Landscape

If you have any plants in your backyard pond, you should trim these or remove them altogether. The plants may be a welcoming environment for female mosquitoes to deposit larvae. Milfoil or parrot’s feather are aquatic plants that can be a favorable environment for mosquito larvae and pupae.

Step 3 – Clean the Pond

You should make sure your pond is always clean. Remove leaves, flowers or other materials that collect in the water. These materials easily decompose and facilitate the development of bacteria, which will attract the mosquitoes. In addition, these decomposed materials may kill your fish or make them ill.

Step 4 – Trim Trees

If the pond is sheltered by trees, you should trim these. Shade is more likely to attract mosquitoes than sun light.

Step 5 – Cover the Pond While You Spread Chemicals in the Yard

Chemicals such as fertilizers, pesticides or herbicides can facilitate the growth of aquatic plants and kill the fish in the pond. When you apply these chemicals in your yard, make sure to cover the pond.

Step 6 – Change the Water Regularly

If you change the water at least once per month, you will have a cleaner pond which will attract fewer insects. Ideally, the water you use should be chlorine or cholaramine free, as these chemicals may be harmful for the fish in the pond. Remove the fish while you change the water. You may also get some chlorine neutralizers from a pet store and add these to the water if you suspect the levels of chlorine are high.

Step 7 – Add Petroleum Oil to the Water

If you don’t have any fish in the pond, you can add petroleum oil to the water, as this solution will kill the eggs. If you don’t have fish, you can also use chlorine in the water.