CMMCP Aerial Larvicide program –
PERFORMED IN BILLERICA & CHELMSFORD ON WEDNESDAY APRIL 19 AND IN
BOXBOROUGH ON THURSDAY APRIL 20.
proposed application areas for Billerica – 600 acres - application
Map of proposed
application areas for Chelmsford – 520 acres - application complete
proposed application areas for Boxborough – 840 acres - application
Please check back for application
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Please note; this
is NOT A
PROGRAM TO SPRAY FOR ADULT MOSQUITOES. This
program will use a granulated
bacterial product ONLY OVER WETLANDS confirmed to have active mosquito larvae. This
is the same
product we have used for over 25
years in member cities and towns
as part of our standard larval control program.
legal notice was
placed in the Boston Globe per 333CMR 13.04(7) on Feb. 3, 2017.
reduce the emergence of spring
brood mosquitoes, notably Ochlerotatus excrucians,
in the towns of Billerica, Chelmsford & Boxborough.
MATERIALS AND METHODS:
Using helicopter applications
of Bacillus thuringiensis israelensis
(Bti), a non-reproducing bacteria used
for the control of mosquito
larvae, the total numbers of spring brood mosquitoes can be reduced. This is the same product we have
used for nearly 30 years as part of our regular ground larval program. Maps of the treatment sites using
GIS software will be prepared for
the contractor. These sites
have been selected using data collected by the CMMCP staff.
we have identified potential areas
of mosquito breeding, we will only
target these areas after confirmation is
received from field observations (pre-surveillance).
All areas will be sampled using
procedures and protocols in the mosquito
control Generic Environmental Impact Report:
average of 1 mosquito per dip over
10 dips will be used as
a threshold to determine if an
application in that area is
will have at least 1 dip station per 250 acres
as a monitoring device.
confirmation is received, the area
will be designated for treatment.
We will generate a report on this
program using the pre and post treatment data we collect. This report will be used
to show efficacy, and will also be sent
to other neighboring towns to
encourage their participation next year, since
this type of program is most
effective on a regional basis. Considering
the similarity of topography in
many towns, we feel confident we
can reduce spring brood numbers, thus
reducing the dependence on our adulticide program.
typically happen in the third week in April, but this
is dependent on the larval stage (the target stage
is the 2nd to 3rd
instar) and weather factors. Site visits will determine the actual date(s) of application. I would anticipate this application to take two to three days, but this
will also be subject to the current weather conditions.
wetland types over 1 acre have
been outlined on the maps. These wetland types
(wooded swamp deciduous, conifer & mixed; shallow
swamp) have been identified as the preferred habitat for the target species.
We will field check these sites,
and any sites
under 5 acres that we identify as not suitable
for this application will be
removed for consideration and
monitored and treated if necessary as
part of our regular, ground larval control program.