Mar 22, 2013 - 09:09 PM
House flies can come from almost anywhere. Usually, however, they breed in areas where moisture and some sort of organic debris is found.
Looking at the picture you posted, the first thing that comes to mind is the fact that this is a busy street with lots of businesses. Trash dumpsters are prime breeding areas for house flys. The trees that are planted on the sidewalk are also a prime area for fly breeding.
Most of the time, these tree "sidewalk pots" are actually a big hole in which water, mold, fungus and a host of other organic things that are conducive to flies accumulate. This is a huge area of concern that in most cases is not correctable.
So the question about where flies come from is probably here.
The best thing to do is to keep the front of the building - stucco, brick, etc, treated with Maxforce Fly Spot Bait. Simply mix this product in a spray bottle and keep the front areas sprayed and treated on 1-2 times per week. When the flies land on it, they die almost immediately. You can also scatter Maxforce Fly Granular Bait around the tree plantings and in cracks in the sidewalk and entrance area.
Here are the links -
The FlyWeb Light is great for use indoors and helps to capture flies, especially at night time when the lights are off.
Other than this, you can fog the area around the door with CB80 periodically to kill the flies on contact -
Hope this helps.