Just don't look for 100% control. Been doing this for many years and have also been using the IGR for beef cattle since it was introduced. The more consistent the cattle are in their intake of IGR, the better the control. Doesn't take any extra labor as it is already in the mineral. I have read that if you can keep the fly population per cow below a couple of hundred per cow you are getting pretty good control, but ours rarely have an infestation that heavy. Fly tags are good for face flys but not very effective for others.
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Today's Featured Article - Talk of the Town: The Saga of Grandpa's Tractor - by The following saga is from the Tractor Talk Discussion Forum. Someone. The saga starts with the following message: Hey guys I have a decision to make. I know what you all will probably suggest and it will probably agree with me way down inside, but here it is. I have a picture blown up and framed in my "tractor room" of a Farmall M. It was my Grandpa's tractor, of which whom I never got to meet. He froze to death getting this tractor out of the barn to pull a truck out of the ditch before I was born. Anyway my dad and aunt had to sell it at the auction,
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