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University of Wisconsin-Extension
After
a flood, mosquitoes, flies and other insects may be more abundant
than usual, posing potential health problems. Filth and debris
left by the storm create excellent breeding conditions for
houseflies and mosquitoes, some of which may be capable of
spreading typhoid, dysentery and encephalitis. The key to
controlling insects is removal of their breeding places-any
standing water, especially stagnant water. In warm weather
this should be done immediately after you return to the premises.
- Empty
water from barrels, old tires, cans and other vessels. In
addition to being a breeding place for insects, this water
may be polluted by floodwaters. Check clogged gutters and
flat roofs that have poor drainage. Make sure cisterns,
cesspools, septic tanks, fire barrels and rain barrels are
covered tightly.
- Drain
ponds, pools or any standing water in which mosquitoes may
breed.
- If
drainage is impossible, treat water puddles still standing
after a week with larvicide as recommended by a county Extension
agent.
- Dispose
of refuse. Bury animal carcasses as soon as possible. Remove
garbage at least once every week. Be sure garbage cans have
tightly fitting lids. When using manure and garbage as a
fertilizer, spread it thinly so it will dry quickly and
not support fly development.
Patch
screens and other places where mosquitoes may enter buildings.
Use a
household spray or an aerosol bomb to kill mosquitoes, flies
or other insects that get into buildings. Spray shrubbery
and shaded areas of buildings to kill adult insects. Contact
your county Extension agent for specific recommendations.
If possible,
keep small children indoors, especially in the evening. If
you must go outside at dusk, use a repellent on exposed parts
of your body and clothing.
Additional resources:
Your county agricultural agent
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NASD Review: 04/2002
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