I have a mosquito magnet. The first year it caught a LOT of mosquitoes. The second year, not so many. The third year, very few. Here is my theory, and it is ONLY a THEORY.

I believe it attracts a certain number of species of mosquitoes, and can pretty much eliminate them. However, if there are multiple species in your area, as there are in ours, it is not that effective. There are too many biting species that are not caught by the magnet.

Just my 2 cents.

EricF