Adulticide Program

To request service at your residence please call our office at 802-247-6779. When submitting a service request, please be prepared to provide the following information to assist our technicians in responding to your request:

Home and/or work/cell telephone number

Email Address
Description of problem & House.
Type of service requested


All truck mounted ULV spraying operations are conducted between 20:00 PM and 06:00 AM. 


If you wish to Opt Out and not have your property treated: please send a written request annually to OCW, PO Box 188 Brandon, VT 05733. Please provide your 911 address and a property map, which delineates your property boundaries on the public right of way. A representative from the district will contact you to assist in marking your property as a no spray zone. Opt out needs to be renewed yearly. The BLSG hotline is 802-247-6779 and will receive request for treatment as needed during the season. Further information or comments about adulticiding activities or application exclusion requests can be obtained from: BLSG Insect Control District or by contacting us at 802-247-6779.


The OCW has a fleet of five trucks and specialized Ultra Low Volume spraying machines for control of flying adult mosquitoes; these are the trucks you may see or hear driving through your neighborhood on summer evenings fogging. The District treats both public and private road ways. We employ a team of drivers that must go through detailed training and become licensed by the State before they can spray. Spraying is done under very narrow weather conditions: it cannot rain, it must not be very windy, and it must be above 50 degrees. To avoid killing beneficial insects (such as bees or butterflies) spraying is done at dusk and after dark. Thus, we have only a couple of hours available on nights with good weather to reduce adult populations.

The extremely small droplet aerosols utilized in adult mosquito control are designed to impact primarily adult mosquitoes that are on the wing at the time of the application. Degradation of these small droplets is rapid, leaving little or no residue in the target area at ground level.

OCW uses a series of factors to determine where & when to spray which includes surveillance, species of mosquito, number of mosquitoes collected from mosquito traps, landing rates, weather and citizen service requests in a given area. This is a required strategy as we can not apply pesticides without justification.

The mosquito treatments we use have minimal environmental impact. Our sprayers use small amounts of chemicals due to very fine atomization, and all chemicals are handled strictly according to law. However, if you wish to be excluded from adult spraying (e.g., you have an organic farm or a beekeeping operation), you should contact the OCW in writing via P.O. Box 188, Brandon, VT 05733; this is due in early April of each year you wish to be excluded. Please include a tax map that clearly shows your property boundaries so that we can identify them on our maps as “no spray zones.” Note that our spraying machines apply materials to about 150 feet of either side of a road; areas further removed will receive little to no spray.

The EPA and the OCW want to remind citizens who are concerned about adulticide spraying may choose to take some of the following steps to help reduce exposure. This may include people who are sensitive to chemicals and those with pre-existing respiratory problems.

  • Stay indoors with the windows closed.
  • If you are outdoors during spraying operations and you can see the spray, avoid contact with it. If you can’t avoid contact, rinse your skin and eyes with water.
  • Wash fruits and vegetables from your garden before storing, cooking or eating.
  • Cover outside items like furniture and grills while the spraying is occurring. Bring pets and items like pet food dishes and children’s toys indoors
  • If you think you have had a reaction to the mosquito spray, talk to your doctor or call the regional Poison Control Center at 1-800-222-1222.