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What control efforts are utilized by the agency?

In order to accomplish long-range and environmentally sound mosquito control, MCMC employs an Integrated Pest Management (IPM) approach. This program incorporates many pest control methods including vector surveillance, breeding source prevention and reduction, biological and chemical control, and public education. With an IPM strategy, control efforts focus primarily on the immature, water-borne stages of the mosquito. The immature stages are generally confined to an aquatic microhabitat and are easier to treat since they cannot escape control measures.

The primary insecticide used to control the immature stage is a biorational (a biological pesticide of natural origin that has limited or no adverse effects on the environment or other beneficial organisms) larvacide, which uses bacteria called Bacillus thuringiensis israelensis (Bti) to specifically target mosquito larvae. Mosquitoes feed on the bacteria, which then releases a crystallized toxin that ruptures the larvas stomach and causes death. Another target specific larvacide uses another bacteria called Bacillus sphaericus (Bs) for the same purpose. At times, an insect growth regulator that mimics naturally found hormones in mosquito larvae are used to suspend and damage the developmental stages of the immature mosquitoes. Biological control measures are also taken by utilizing different fish species to control larval populations in enclosed habitats. The state of New Jersey has established a statewide mosquito fish program that uses resources from the Division of Fish and Game to provide mosquito fish, Gambusia affinis, to counties as needed. In addition to Gambusia, the program also offers other species of fish for mosquito control, including the fathead minnow and two species of sunfish (Bluegill Sunfish and Pumpkin Seed Sunfish). Chemical control measures are also taken by using an organophosphate liquid larvacide on older larvae that no longer feed. A petroleum oil derivative is also used from time to time, which is mainly used as a pupacide in aquatic habitats. As a last resort, a synthetic pyrethroid is used as an adulticide if unusually large numbers of adult mosquitoes are present and public health is threatened. All pesticide applications comply with guidelines recommended for mosquito control in New Jersey by the Agricultural Experiment Station of Rutgers University and regulations set forth by the NJ Department of Environmental Protection.

The agency also conducts year round water management and source reduction projects that eliminate standing water. MCMC has adopted strategies, in accordance with New Jersey Department of Environmental Protection’s Best Management Practices (BMP), to reduce mosquito-breeding habitat by physically managing water's flow. This can range from removing logjams and blocks from a waterway, cleaning of detention basins to ensure proper drainage, stream clearance and environmentally friendly beaver management. Although most water management activities are conducted during the winter in preparation for the approaching season, management is also undertaken as needed during the summer season. Tire collections and removal have also been incorporated to reduce habitat areas for container breeding mosquitoes.

What pesticides are used to control mosquitoes in Mercer County?

The majority of the pesticides used are products to control mosquito larvae in the water. However, it is sometimes necessary to use pesticides to control adult mosquitoes. For more information regarding the specific pesticides used, how to avoid exposure and general symptoms of exposure, please refer to the accompanying NJ Department of Environmental Protection approved Fact Sheets.

Where can I find more specific information on mosquito spraying in Mercer County and how will I be notified of the spraying?

The community will be notified of any adulticiding activity in Mercer County, whether by ground or aerial applications, through announcements in two local newspapers (The Trentonian and The Times of Trenton), via the MCMC Hotline (609-530-7501), and also the agencies web site (see above). Any citizen has the right to ask the MCMC for specific information about a planned application in the county prior to the application.

How can county residents contact the MCMC?

If mosquitoes present a problem in your area, or you would like a site inspected by division personnel, the below contact information may be used.

Mercer County Mosquito Control
300 Scotch Road
West Trenton, New Jersey 08628
Tel: 609-530-7501
Fax: 609-530-7507
Email: mercermosquito@mercercounty.org

All complaints and general calls are promptly investigated, with follow-ups conducted to ensure that the problem does not persist.

Mercer County Mosquito Control Pesticides

Trade Name Active Ingredient Class Uses Label Safety Data Sheet
Category: CHEMICAL
AquaDUET  Sumithrin  Pyrethoid Adulticide  Label  SDS 
DUET Sumithrin Pyrethoid Adulticide Label SDS
Delta Guard Deltamethrin Pyrethoid Adulticide Label SDS
Anvil 2+2 Sumithrin Pyrethroid Adulticide Label SDS
Zenivex E 4 Etofenprox Pyrethroid Adulticide Label SDS
Suspend Polyzone Deltamethrin Pyrethroid Adulticide Label SDS
Demand CS   Lambda-cyhalothrin  Pyrethroid Adulticide  Label   SDS
BVA Oil Mineral Oil   Surface Oil Larvacide/
Pupicide 
Label  SDS 
Coco bear oil Mineral Oil Surface Oil Larvacide/
Pupicide
Label SDS
Category: BIORATIONAL
Altosid Liquid Larvicide  S-Methoprene Insect Growth Regulator  Larvicide  Label  SDS 
Altosid XR BRIQUETS       S-Methoprene Insect Growth Regulator Larvicide  Label  SDS 
Altosid BRIQUETS S-Methoprene Insect Growth Regulator Larvicide Label

SDS

Altosid PELLETS  S-Methoprene  Insect Growth Regulator Larvicide  Label  SDS 
Altosid XRG  S-Methoprene Insect Growth Regulator Larvicide   Label  SDS 
FOURSTAR Bti Briquets  Bacillus thuringiensis var israelensis Bacterial   Larvicide   Label  SDS 
FOURSTAR Bti CRG  Bacillus thuringiensis var israelensis Bacterial    Larvicide    Label  SDS 
MetaLarv S  S-Methoprene
Insect Growth Regulator  Larvicide   Label SDS 
Natular DT  Spinosad  Bacterial  Larvicide  Label  SDS 
Natular G30 Spinosad Bacterial Larvicide Label SDS
Natular XRT  Spinosad   Bacterial  Larvicide Label  SDS 
VectoBac G Bacillus thuringiensis var israelensis Bacterial Larvicide Label SDS
VectoBac GS Bacillus thuringiensis var israelensis Bacterial Larvicide Label SDS
VectoBac 12AS Bacillus thuringiensis var israelensis Bacterial Larvicide Label SDS
VectoLex WDG  Bacillus sphaericus Bacterial  Larvicide  Label  SDS 
VectoMax FG Bacillus thuringiensis var israelensis Bacterial  Larvicide  Label  SDS 
VectoPrime FG  Bacillus thuringiensis var israelensis Bacterial   Larvicide   Label  SDS 
Spheratax sph 50 Bacillus sphaericus Bacterial Larvicide Label SDS
Summit Bti BRIQUETS  Bacillus thuringiensis var israelensis Bacterial  Larvicide  Label  SDS 

Mosquito Fish Species

Species Common Name Class Uses
Category: BIOLOGICAL
Gambusia affinis Western Mosquitofish Mosquito fish Larvacide/pupacide
Pimephales promelas Fathead Minnow Mosquito fish Larvacide/pupacide
Lepomis macrochirus Bluegill Sunfish Mosquito fish Larvacide/pupacide
Lepomis gibbosus Pumpkin Seed Sunfish Mosquito fish Larvacide/pupacide
Fundulus diaphonus Freshwater Killifish Mosquito fish Larvacide/pupacide

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