Swimming pools & mosquitoes
Swimming pools that
are not properly maintained can be excellent larval habitat for mosquito
species that can transmit West Nile Virus
such as Culex. If you have a swimming
pool in your yard that will not be opened, please call our office and we can
apply bacterial products that will reduce/eliminate mosquitoes from emerging
from this area. These products will not harm your pool if you plan to open it
in the future.
If there is a pool in
your area that is not on your property, please call your Board of
Health office and ask them to e-mail us at firstname.lastname@example.org
or fax this information on letterhead to (508) 393-8492.
Click here for a 10
second video of Culex larvae we
recently found in an abandoned swimming pool: http://tiny.cc/620vkx
Tens of thousands of larvae (identified by our lab
as Culex pipiens/restuans) in an abandoned
swimming pool. This pool had a 2-3 inch ring around the entire
perimeter…this pool was approximately 25 feet across. The circumference
is approximately 78.5 feet (c=d*π) – that’s a lot of
- Culex pipiens - Very common year round mosquito which
primarily feeds on birds. It will readily enter a house, but is
considered shy. It will typically only bite people when they are
motionless, usually while they are sleeping. The larvae are found in
water holding containers and in polluted waters. Culex pipiens are considered the primary vector of West Nile Virus. West Nile Virus has been
isolated from this species in Massachusetts.
- Culex restuans - Culex restuans has a distribution
that ranges from central Canada
south into Mexico.
The mosquito is very common in the eastern and central United States. Culex
restuans undergoes a life cycle that is typical for domestic Culex.
Inseminated adult females enter hibernation in fall and pass the winter
in a period of quiescence. Culex restuans utilizes an exceptionally
wide range of larval habitats. The water used by this species can vary
from nearly clear to grossly polluted. Culex
restuans regularly colonizes temporary ground pools that remain
flooded after they have produced broods of floodwater Ochlerotatus.
Culex restuans is also the first species to utilize water that
collects in discarded tires. The species can often be found in tire
water that is absolutely clear and devoid of leaf litter.