Golden Malrin was not effective for our fly problem when we had horses. We are surrounded by beef cattle. The Golden Malrin couldn’t keep up with the incoming.
I used fly predators and they not only killed my flies but went out into the neighbors field and killed his flies. I no longer have horses and no longer order the fly predators. The predators multiplied and are still around killing flies. I have very few flies and the cattle are still close by.
What are these predators? Here in NW Arkansas it’s fly hell!