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Flies & flying insect pests in buildings: how to control or get rid of indoor flies & other flying insect pests. How to prevent indoor flies, ladybugs, mosquitoes, moths & other annoying flying insects. This article describes fly control suggestions for residential buildings, outhouses, farm buildings. We include fly control remedies from expert sources as well as from inventors & readers.
Some of these steps to get rid of flying insects indoors work for just about any species of flying insect that is attracted to light, odors, bug traps while others focus on specific insects (flies, mosquitoes, ladybugs). We include citations of expert sources & research on the fly problem at & around buildings, both residential & farm buildings.
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Fly control in & around buildings; flying insect control & removal in buildings, outhouses, out-buildings, farm buildings
Categories of fly control in & around buildings
Control: fly & insect control refers includes these subtopics:
Photo at left: cluster flies in an attic wall and on the attic floor in a Pelham NY home.
[Click to enlarge any image]
Insecticides used for fly control ar typically described in these categories
Watch out: selection and application of any pesticide, spray, bait, and even some insect traps should be performed by an expert, trained & licensed where requested. Misapplication of pesticides, insecticides, sprays, fogs, traps, baits may be unsafe and can present serious health risks for humans or other animals in and around buildings.
Reader Question: too many flies at the Outhouse or Latrine
My outhouse is producing allot of flies inside this summer and i was wondering why and how to get rid of them. It has been a dry summer in ontario and i thought maybe the pit was producing more flies because of the dryness.what should i do? - Devon 9/2/12
Reply: suggestions for fly control at outhouses, latrines, privies
Fly Removal Suggestion: Electric Fly Ejector Gets Flying Bugs out of Buildings
How to combine a vent fan and a simple light bulb to blow flies, moths, mosquitoes or other flying insects out of a building.
Cervenka & Hahn (2008) and other expert sources confirm that flies are drawn to light and recommend that approach to attracting them to an area for removal by vacuuming. We took this idea further with a fly ejector mechanism that has worked well where there is a sudden and aggravating surge of indoor flying insects.
If your building already has a through-wall kitchen exhaust fan or a cathedral ceiling - roof exhaust or vent fan (below left), try clipping an incandescent light bulb as close as you can get to the center of the exhaust fan opening (we found that a 60 Watt bulb right at the edge of the fan opening worked wonderfully - Ed.).
In the photo at left that brown wood rectangle is a removable hatch that gives direct access to a roof ventilation fan. Simply remove the hatch cover, clip a light to a hatch turnbuckle or to the hatch opening trim and turn on the fan to blow irritating flies & moths outside.
At below left we show a solar-operated roof exhaust fan that could be used also as a bug or fly ejector. A whole house exhaust fan can also blow indoor bugs outside, but is a bit dramatic and may not be something you want to run in all weather conditions & temperatures.
Temporarily, even a box fan in a window along with a light bulb can produce quick and wonderful results (below right).
With other lights in the building area off and the exhaust fan running, turn on the light bulb next to the exhaust fan opening. You'll find (as we did) that most flying insects are attracted to the light and are promptly sucked (or blown) outside. Larger insects such as moths and house flies produce a satisfying ping sound as they bounce off of the outdoor exhaust fan cover. - Editor.
Fly Killing Without Sprays or Pesticides
If a household or business has a problem with flies, try suspending a light bulb, preferably incandescent, over a pan of soapy water and leaving only that light on at night. In my experience, the pan with have collected the flies by morning. - E.B. [reader] 11/29/2013. Dr. E.B. is a physicist interested in, among other things, fly control in buildings.
Cluster Flies in Buildings
Cluster flies are a nuisance in buildings that can be prevented by sealing their points of entry into buildings. But in our experience such sealing is especially difficult on many older homes and in attics with various ventilation openings in soffits, eaves, and at ridges. Experts recommend vacuuming up cluster flies, attracting them with a light to make clean-up easier.
Photo at left [click to enlarge]: cluster flies, ladybugs and wasps all contend for interment space on the attic floor of this home in the northeastern U.S.
Use of an indoor spray insecticide labeled for indoor flying insects is acceptable, though we warn that some people such as those with allergies or asthma can be troubled by the common indoor insecticide ingredient of pyrethrins.
Significantly, Cervenka & Hahn point out that use of insecticide on cluster flies on a building exterior is rather irrelevant: when you see them alive they are trying to move away from the building, and treatment does not reduce the next fall's fly population.
Expert Citations on Fly Control Around Farm Buildings
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