I also use the “add water to the odor attractant”
bag type fly traps. I hang mine using zip ties on the metal panels near
my horses manure/urine areas. I keep them refilled with water until they
are stuffed full of flies. I also leave the old ones up for a couple
weeks when I put up new ones. The bags last a month or more. They
work great! They catch thousands of flies preventing millions more from
being produced!
I hang the old fashioned pull out sticky strips in the barn
in places I don’t want it to smell (the fly bag traps really stink).
They also catch lots of flies and are very cheap (.25 a strip). They are
a little gross and you have to be careful not to get “caught”
yourself but they do work.
I also use fly predators on a three week schedule placing
them in my manure/compost and in the horses’ paddocks.
I do not have to spray my stable area and use very little spray
on my horses (usually only on conditioning rides to discourage deer and horse
flies).
My horses also wear fly masks and get a couple tablespoons
of garlic every day (which my vet says is perfectly safe—he said it would
take cups of garlic a day to cause anemia in a horse). The garlic keeps
the gnats off the horses. I have experimented with the garlic and am sure
it keeps the gnats off the horses better than any other repellent.
