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Office Status: Normal
Employee Information

Mosquito Control

The Maryland Department of Agriculture (410-841-5700) in cooperation with St. Mary's County Government, provides an Integrated Pest Management program for mosquito control on a county-wide basis. This includes surveillance of wetland habitats, applications of insecticide for control of mosquito larvae, biological control, public education, investigating mosquito complaints and responding to requests for service. The link to the Maryland Department of Agriculture web page for mosquito control is mda.maryland.gov/plants-pests/pages/mosquito_control.aspx.

Temporary Program

This Program operates from March to September and is conducted in two phases. Phase A-The Mosquito Surveillance and Larvamosquito control l Control Program operates from March to September and includes extensive field surveys and inspections of various water retaining bodies (salt marshes, swamps, roadside ditches, storm-water management ponds etc.) for larval breeding sites. Areas found to contain mosquito larva are treated with the appropriate biological insecticides. Phase B-The Adult Mosquito Control Program operates from June to September and involves conducting weekly landing rate counts for adult mosquitoes. Communities with counts greater than 5 mosquitoes in two minutes are fogged with adulticides. This part of the Program is voluntary and requires annual renewal of agreements between the Department of Agriculture, St. Mary’s County and local communities. MDA provides adult mosquito services, including surveillance of adult mosquitoes and operation of spray trucks in approximately 90 communities that request the service and agree to paying 100% of the cost of the service.

Tips to rid Your Community of Mosquito Breeding Sites

The following tips have been provided by the Maryland Department of Agriculture which can also be found on the MDA’s website. The St. Mary’s County Health Department has developed a Toolkit that Homeowners’ Associations and housing communities can use to launch a Neighborhood Mosquito Source Reduction Campaign. In addition to being a general nuisance, mosquitos are known to cause various illnesses such as dengue, chikungunya and Zika virus disease. A Mosquito Source Reduction Campaign helps neighborhoods decrease local mosquitos by getting homeowners to remove sources of mosquito breeding in their yards. Homeowners’ Association volunteers or others coordinating a neighborhood campaign could share information with their neighbors about how to reduce mosquitoes. Campaigns could also involve neighborhood volunteers going door-to-door in their communities to help property owners detect and address mosquito breeding sites. The Neighborhood Mosquito Source Reduction Campaign Toolkit contains outreach materials, template letters to property owners, sample community newsletter articles, and additional information to address neighborhood mosquito control. The Toolkit materials are available electronically at www.smchd.org/mosquito-control. For more information about implementing a neighborhood mosquito source reduction campaign in your community, please visit www.smchd.org/mosquito-control or call the Health Department’s Environmental Health Division at (301) 475-4321.

Permanent Program

This Program operates from November to February. Activities for the next season are planned, source reduction projects are initiated, mapping of mosquito breeding areas are conducted and equipment maintenance is performed. For more information on mosquito control in Maryland, access MDA's website.


All programs are funded by the Maryland Department of Agriculture, the St. Mary’s County Government and/or Local Communities. Although temporary and permanent programs are funded at different ratios, the combined total budget for mosquito control is approximately $178,500, which is comprised of $85,000 in local community contributions (collected by the County through agreements), $56,100 placed by the County into the Health Department's budget and $37,400 from State appropriations.