Mosquito Control Services in Scarsdale & Westchester

Two mosquito species drive the majority of complaints in Westchester County, and they behave very differently. Culex pipiens — the Northern house mosquito — is the primary West Nile virus vector in the region. It breeds in stagnant, organic-rich water: clogged gutters, neglected birdbaths, low-lying lawn areas that hold water after rain, catch basins, and any container that accumulates standing water for more than a few days. Culex is most active at dusk and dawn.

Aedes albopictus — the Asian tiger mosquito — is a more aggressive and challenging pest. Unlike Culex, tiger mosquitoes are aggressive daytime biters that breed in very small water volumes: tree holes, leaf axils, flower pot saucers, and even a bottle cap with a quarter inch of rainwater. They were established in Westchester County in the mid-1990s and are now the dominant nuisance species in residential yards. Tiger mosquito control requires a combination of thorough breeding site elimination and repeated barrier treatments because new adults emerge continuously from cryptic micro-sources that are difficult to find and eliminate completely.

Effective mosquito management addresses both species simultaneously. Larvicide applications to identified water sources interrupt the Culex breeding cycle at the source. Barrier spray treatments to perimeter vegetation and understory shrubs — where both species rest during daylight hours — reduce adult populations immediately and provide residual suppression. Because pyrethrin-based barrier products break down with rainfall and UV exposure, the 21-day re-treatment cycle is not optional; it's what maintains continuous suppression between applications.

If your concern extends beyond mosquitoes to include deer ticks and Lyme disease prevention, our LymeShield program provides the same mosquito barrier spray combined with targeted deer tick nymph treatment throughout the spring and summer season — a more complete solution for properties with deer pressure or wooded edges. Standalone mosquito control is the right fit for properties that have already addressed tick risk separately, or for clients who want seasonal mosquito management for a specific period or event.

Westchester County's wetland corridors — particularly along the Bronx River and its tributary streams — serve as regional mosquito breeding reservoirs. Properties adjacent to or near these corridors, including many neighborhoods in Scarsdale, Eastchester, and Ardsley, experience higher baseline mosquito pressure than inland areas. Our site inspection identifies the specific breeding sources on your property and quantifies whether the primary pressure is originating on-site or migrating from adjacent areas — which shapes the treatment strategy and expectations for reduction.