In the barn what works the best to control flies? Would it be the strips, flie traps, or sprays?

I've had the most success with the pheramone type traps. Add water to the bag, hang it and toss the whole thing when it's full of flies! You need to be careful where you hang it, though, because it will attract flies that you may not have. I have an in-line shedrow style barn (open in front of all the stalls), not an enclosed barn with a center aisle. Here in the desert, it's too windy and dusty for the sticky traps & strip to work in an open-front barn. All they collect is dust! Some people like the spray systems for inside the barn. I don't know how they work in windy situations, but I would think they work well in a barn with a center aisle. Oh, also, if you use traps, they say to experiment with the height because different flies travel at different heights. You sort of need to know the type of flies you're dealing with.

 Thanks Scotts Mom for the reply. Do different flies traps work on different flies? Because you said I need to know what type of fly I'm dealing with.

In NH I use the sticky strips and hang them in the rafters of my run in shed, I also sometimes use the Trap 'N Toss fly traps and hang them over near our water tub.  I have to be careful to make sure they are secure though as we also have cattle out with our horses and they are forever curious and seem to have to tase everything.  I don't go crazy with the fly control, I just do near the water tub and under the run in shed as those are the two areas where the horses and cows tend to loaf around the most and I tend to catch the most flies there.  Otherwise I make up the difference with a fly sheet (with the neck piece) for Solo (my TB) and fly masks for both my horses and then the Absorbine Ultrashield EX fly spray as needed.

 Soundslike you have a handle on the fly situation there. Glad the flies traps yo are using works. Did you know you can make your own fly strips?

Not exactly a fly trap, But i found somewhere online that putting a few pennies in about an inch of water in a plastic baggie and hanging it in the barn will keep the flies away. 

Sorry Debi - I haven't been on for a while. The reason you need to experiment with the height of the traps is because different fly species fly at different heights above the ground. I honestly don't know the heights the different fly types fly, but it seems that in my barn, the higher traps catch more flies than the lower ones. My horses don't get the flies on their legs which make them stomp, so I guess I have the flies which fly higher.

Miss_Versatility :

Not exactly a fly trap, But i found somewhere online that putting a few pennies in about an inch of water in a plastic baggie and hanging it in the barn will keep the flies away. 

That's interesting. I guess it's some sort of chemical reaction with the penny's metal and the water. Now a DUMB question... the baggie needs to be open, right??!! (I think I just had my "stupid moment" for the month!!)

The Baggie is closed. It doesn't catch the flies but repels them.

That's interesting. I would have never thought of it that way. Thanks!