Unscheduled Spray Activities
MDA works with many communities across the state to provide routine mosquito spraying services; however, when mosquito-borne disease activity is detected in an area that we do not regularly serve, MDA will spray the area and announce that activity on this web page and on Twitter @MdAgMosquito. This activity is called an "unscheduled spraying." The product used in our ground ULV spray program is a synthetic permethrin-based product. (See our product labels page for more info.)
Any existing spray exemptions in these areas will be temporarily suspended. People should avoid outdoor activities on spray nights. For more information, call MDA’s Mosquito Control Program at 410-841-5870.
Unscheduled Spraying (Weather Permitting).
- There are no unscheduled spraying activities at this time..
For information about the types of pesticides used in truck-mounted and airel spraying, click here.
A Note About Non-Target Organisims
We are very concerned about the effects of our activities on
non-target organisms, like honeybees and bats. We only conduct truck mounted
spraying or misting at night. Bees are not active at night. The droplets in the
spray have an extremely small diameter. The surface to mass ratio of these
droplets is such that these droplets do not leave residue on surfaces. They are
like tiny parachutes. When they are pulled down by gravity, drag keeps them
from falling. The point is that these droplets do not land or stick on
surfaces. When bees become active the next day and crawl across surfaces, those
services do not have any pesticide from our spray. The droplet size averages 15
micrometers. There are 1000 micrometers
in a millimeter. We must have our
machines tested, by law, twice a year. We announce all unscheduled sprays on @MdAgMosquito
(Twitter) and through press releases. If you would like to receive notice of
all UNSCHEDULED spraying, send your email to us at: mda.news@maryland.gov. See scheduled spaying here.