Mosquito Management Program


If your property is in the City of Columbus, please submit your request to the City of Columbus 311 Service Center by calling 311 or (614) 645-3111.  If you're not sure, please check the address on the City of Columbus Zoning Map. 

Management Plan

Mosquito Trapping

Mosquito Trapping

A good adult mosquito surveillance program is perhaps the cornerstone of mosquito management and control. Surveillance involves trapping and counting mosquitoes, identifying the species, and performing disease testing on the mosquitoes. Franklin County Public Health takes a proactive approach to mosquito management by performing weekly adult mosquito surveillance.

Mosquito Treatments

Mosquito Treatments

As part of our commitment to mosquito control, each spring our staff implements a comprehensive catch basin (storm drain) treatment program throughout the county. We inspect catch basins and use historical data and mapping to determine whether or not it is designed to hold water or is holding water.

Mosquito Spraying

Mosquito Spraying

Spraying or adulticiding is the application or treatment of pesticides to exterminate adult mosquitoes. The most common way to apply these pesticides is using truck-mounted ultra-low volume spray units driven on public roadways. Adulticiding is one of the tools we have in order to control and manage mosquito populations.

Prevention Tips & Tools

Tires, buckets, cans, bottles and plastic containers
Bird baths (drain and refill every 3-4 days)
Wading or kiddie pools (drain and refill frequently)
Pools and hot tubs (keep chlorinated, covered or keep completely dry)
Pool covers that hold water
Boats, boat covers and tarps
Pet food containers and water dishes
Clogged gutters and downspouts
Leaky outside faucets that create puddles

Mosquito Biology

Life Cycle

Mosquitoes have four separate stages in their life cycle. They begin as eggs that are laid atop bodies of water either singularly or in clusters called “rafts”. The eggs then hatch underwater and are called larvae. Larvae go through four stages of their own called “instars” before molting into pupae. It is in the pupal stage that the adult mosquito begins to form. Within a few days the cycle will be complete with the adult emerging on the surface of the water.

Biting and Breeding Habits

Mosquitoes feed primarily on nectar but the female must take a blood meal before she can produce her eggs. The male mosquito does not need a blood meal and therefore does not bite. Females only mate once, after which they are capable of producing eggs on their own (with the help of another blood meal of course). Female mosquitoes typically live for about a month, but can produce up to 1,000 eggs in their lifetime.

Mosquitoes in Ohio

There are over 60 different species of mosquitoes in Ohio. It is important to remember that not all mosquitoes carry diseases and most prefer not to bite humans. There are however, several species known to carry diseases such as West Nile virus, La Crosse and St. Louis encephalitis. Here are some common vector (disease carrying) mosquitoes in Ohio.

  • Culex pipiens primary vector for West Nile virus and St. Louis encephalitis; active in the evening.
  • Aedes triseriatus vector for La Crosse encephalitis; active during the daytime.
  • Aedes albopictus vector for Chikungunya; active during the daytime. Disease is not present in Ohio but is of concern because this aggressive mosquito is an excellent disease vector

For more information about mosquito borne diseases, please visit the CDC's website.

Mosquito Borne Diseases

West Nile virus is a disease transmitted to people from the bite of an infected mosquito. It has been commonly found in humans, birds and other animals in Africa, Europe, Western Asia and the Middle East. The virus attacks the central nervous system causing symptoms ranging from fever and headaches to encephalitis which can be fatal. For most people the risk of catching West Nile virus is low. People over 50 and those with compromised immune systems are the most likely to display symptoms.

The most human cases reported in Ohio were 441 in 2002. To see the current number of human cases in Ohio, visit the Ohio Department of Health's web site.

For more information about West Nile Virus, visit these links:
CDC Fact Sheet: West Nile Virus: What You Need To Know
Zoonotic Disease Program West Nile Virus on

La Crosse encephalitis is a viral disease spread by infected mosquitoes. It is native to the upper Midwest and Appalachia, and was first diagnosed in La Crosse, Wisconsin in 1963. The virus can cause symptoms including fever, headache, nausea, fatigue, and vomiting. More severe effects usually occur in children and can include seizures, coma, paralysis, and permanent brain damage. These symptoms typically occur 5 to 15 days after being bitten. Children under sixteen and those with compromised immune systems are at the greatest risk. There is no vaccine available and treatment focuses on alleviating symptoms.

Since 2000 there have been 294 human cases of La Crosse encephalitis reported in Ohio.

For more information about La Crosse encephalitis, visit these links:
Information on Arboviral Encephephalitis on the CDC
Zoonotic Disease Program Mosquito-borne Diseases on

In the United States, the leading cause of epidemic mosquito-borne encephalitis is St. Louis encephalitis. According to the Centers for Disease Control, less than 1% of SLE viral infections are clinically apparent and the vast majority of infections remain undiagnosed. Illness varies in severity from a mild headache to inflammation of the tissue surrounding the brain and spinal cord.

According to the Ohio Department of Health, “Nationally, widespread epidemics of SLE have occurred. The largest and most recent epidemic occurred in 1975 in the Midwestern states, resulting in 1,815 cases; 416 of those, including 29 fatalities, were from Ohio. Between 1976 and 2009, Ohio has documented only 26 cases.”

For more information about St. Louis encephalitis, visit these links:
Information on Arboviral Encephalitides on the CDC
Zoonotic Disease Program Mosquito-borne Diseases on