Maybe that's why the neigbor has so much problems. He puts them in in the spring, and cuts off the old tag the next spring to put in a new one.
dunmovin farms
> I'll just make a small
> contribution to this discussion. I
> use to use tags here in Central
> Texas, according to label
> directions. Some tags 1 per
> animal, others required a tag in
> both ears. I alternated tags with
> different chemical components,
> which I think is a must for this
> method of control to be effective.
> We would work the calves in the
> spring which was a little to early
> to tag the cows and the tag's
> effectiveness ended in August,
> when we needed maximum control.
> Even with altering the different
> kinds of tags they soon became
> less and less effective. Why? fly
> resistance to the control being
> used. Why? Because I mis managed
> the use of the tag. They should be
> removed from the animal toward the
> end of their useful period. The
> control dose becomes so minimal
> that the fly can develope
> tolerance to that control, which
> demands alternating tags
> containing different controls.
> That means another trip thru the
> working pens. I prefer the back
> rub method used in combination
> with sprays etc. However, I do
> think tags are a useful and
> effective management tool if used
> correctly in the right situation,
> such as where penning is not a big
> issue. Tags are being improved
> every year.
> What about using fly tags for
