Understanding Mosquito Biology for Better Control
To effectively control mosquitoes, it helps to understand their life cycle. Mosquitoes go through four stages: egg, larva, pupa, and adult. Eggs are laid on or near water; in warm weather, they hatch within 24-48 hours. Larvae, called wrigglers, live in water and feed on microorganisms. After about a week, they become pupae (tumblers), which then emerge as adult mosquitoes. Only female mosquitoes bite, needing blood protein to produce eggs. They are attracted to carbon dioxide, body heat, and certain odors. Knowing this, you can target breeding sites (standing water) and resting areas (cool, shaded vegetation) to reduce populations. In Delaware, where humidity is high, even small amounts of water like a bottle cap can support egg development. Regularly inspecting your property for any standing water is the single most effective prevention measure.
Mosquito-Borne Diseases in Delaware
While most mosquito bites are merely itchy, some mosquitoes in Delaware carry diseases. West Nile virus (WNV) is the most common, with cases reported every year in the state. According to the CDC, Delaware typically sees a handful of human cases annually, plus many more in birds and horses. Symptoms range from mild fever to severe neurological illness. Eastern equine encephalitis (EEE) is rarer but more deadly; it has been found in Delaware mosquitoes and birds. Dog heartworm is another risk for pets, transmitted by mosquitoes. The Delaware Division of Public Health monitors mosquito populations and tests for viruses. During peak season, they may issue advisories. Protecting yourself with repellent and reducing mosquito breeding sites reduces disease risk.
Regional Variation Across Delaware
Delaware's mosquito season varies by location. In northern Delaware (New Castle County, including Wilmington), the season typically runs from May through September, with cooler spring and fall temperatures limiting activity. Central Delaware (Kent County, Dover) has a similar season but slightly warmer. Southern Delaware (Sussex County, including Rehoboth Beach and Lewes) has the longest season, often starting in April and extending into October, due to milder winters and proximity to tidal marshes. The coastal areas also have salt-marsh mosquitoes that can be aggressive biters. Homeowners in southern Delaware may benefit from year-round larvicide treatments for ponds and ditches. Regardless of location, professional mosquito control services can tailor treatments to your specific area and needs.
Mosquito problems by the numbers
The statements below are tied to named surveys, studies and published cost guides, and each one says what it does and does not prove. They describe patterns across many households, which is useful context, not a diagnosis of any one property. Thirty-one percent of women surveyed for Mosquito Squad's 2016 Fight the Bite report, a provider-sponsored TNS Global poll of U.S. homeowners with an undisclosed sample, said mosquitoes had changed their plans in the previous year. HomeTeam Pest Defense's March 2022 online survey of U.S. homeowners ages 25 to 75 found 66% would be concerned by mosquitoes at home, the same share as for ticks; the sponsor sells pest control, so the figure measures stated concern, not infestation. About 71% of homeowners said they had avoided or left an outdoor event because of insects, according to NaturaLawn of America's March 2024 SurveyMonkey poll of 1,163 U.S. homeowners, a provider-sponsored, self-reported survey; the figure covers insects generally, not any species' infestation rate. When TNS Global polled U.S. homeowners for Mosquito Squad in 2016, 15% of men reported that mosquitoes had altered their prior-year plans, about half the rate women reported; the survey was company-sponsored and its sample size was not published. Before spending a weekend with store-bought sprays, consider that 64% of DIY users in HomeTeam Pest Defense's 2022 online survey of U.S. homeowners said their problem was not fully solved, a self-reported figure from a provider-sponsored survey, not a success-rate study. If one number should shape your next step, it is how often do-it-yourself attempts fall short. That is not an argument against trying, but it is a reason to set a deadline and call a professional if the problem persists past it.