Program Objectives
The objective of
this pilot program is to test the feasibility of Back River midge control and
determine the impact of Bacillus
thuringiensis israelensis (Bti) in controlling midge populations in
the area. The pilot program will also aim to determine the most cost effective
dosage and frequency of Bti treatments
in the area.
Planned Treatment Method
Bacillus thuringiensis israelensis (Bti) will be applied by
boat using an apparatus designed specifically for midge control. Bti is a naturally occurring soil
bacterium that has been demonstrated to be non-toxic to humans, mammals, birds,
fish and most invertebrates. While the schedule is subject to change, the
preliminary schedule is for five monthly treatments: August-October 2017,
and May-June 2018.
Treatment Areas
Staff from MDA and DNR have worked together to
identify a 260-acre section of the Back River in Essex where midge populations
have become a major nuisance.
What product will be used?
The insecticide that
will be used for this project is Bactimos WG. The
active ingredient is Bti.
Is Bti safe?
The pesticide,
Bactimos WG, was chosen because of its effectiveness for this use and
because it is only harmful to a very limited variety of organisms including midge
larvae, black fly larvae, mosquito larvae and a few other aquatic Dipteran
(flies) insects. It is not harmful to humans, fish, crabs or other aquatic
invertebrates. More
Information
Monitoring
Maryland Department of Natural Resources biologists will conduct larval sampling
and continuous adult sampling using light traps. DNR will also track midge
complaints in the area. For more information, contact Maryland Department of
Natural Resources (Access.DNR@maryland.gov).
Spray Notification
The Maryland Department of
Agriculture will manage the aquatic spray contract and issue spray
notifications