Yes, well, I grew up around and used lots of pesticides that I know more about now, too.
The local parks use diatomaceous earth or talc because of the lack of off target environmental effects. They can open the trails to use in half an hour or so.
One of our horses came close to an anaphylactic shock reaction. It was a trail ride and my with and the horse were probably #25 or so. By the time they got to the yellow jacket hive in the ground, the yellow jackets were definitely PO. At the next vet check, she went to the vet and said "hey, I know that my horse passed the vet criteria, but I don't think that he's doing ok". She pulled him from the ride. We call it "ADR", "ain't doin' right", where you know the horse isn't right for himself, even though he looks ok otherwise. In another half hour he had welts everywhere, and the poor guy ended up on high dose IV antihistamines, and an IV bag of fluids for a couple of hours. The next day grooming him, I found and removed thirty two spots with yellow jackets still attached. Who knows how many more times he was bitten. He was fine in twelve hours or so, and a real trooper, but that experience put the fear of Yellowjackets in all three of us, and we learned to scoot down the trail at the first sign of one.
Stay safe out there,
All the best,
Peter