I also add the garlic powder in the feed for fly control. I was adding as much as 10 pounds per ton 2 years ago when I had a huge EHD hit and it didn't seem to slow down midges, flys will almost completely leave the deer alone. A few will still land on them but don't seem to bite them. I lost 52 deer in 10 days and the day I started fogging with the guardian fogger, I completely stopped it. It's the one Wayne Green sells on here. I have a stagnant stock pond right next to my breeding pens and once I fogged the pond, it completely stopped. I lost about a dozen of the best yearlings I've ever had along with a 2 year old breeder that gave me 6 out of 9 bucks that should go over 200 inches this year at 2. In my opinion a misting system would be fine for fly control but if your after the midge, hes probably already made it into your pen by the time the mister comes on. The fogger is inexpensive to use. I fogged a 400 acre slough on my farm a couple times a week and never lost a single wild deer after that, some years I can find a hundred that die from EHD. We've had EHD in our area for 30 years(central SD). Don't wait for them to get into the pen, go after em on the mud where they live and you can stop it. The best price I found the bulk garlic powder was the webstaurant store.com.