Python Fly dust better than fly spray?

I am probably last to know there is a livestock fly dust that is safe and meant for horses, too. Anyone have experience vs fly sprays? It was mentioned on another forum as being more effective against horseflies than regular sprays, even Deep Woods Off

Okay, I Googled, and on the TSC site reviews address use in goats mostly, but a couple horseowners gave good reviews.
Caveat: it is harmful to humans if absorbed through skin, so unless you can quickly wash it off yourself, not a risk I care to take.
Manufacturer warnings include wearing gloves, removing clothing immediately after use, washing hands before eating drinking or using the toilet.
Dust is going to get on you a lot quicker than any spray & I imagine inhaling is not great either - which is highly likely dusting a horses back.

I do dust my chickens with Sevin, but a lot less surface & I rinse off with soap & water ASAP.

For the horses I use Gordon’s concentrate - also from TSC, 10% permethrin @ $15 for a quart that can easily make 30 quarts of spray when mixed as I do: at 1-1/2 to 2X suggested.
So far no reaction from horses or myself when I get sprayed.

Thanks @2DogsFarm, it seems to have the same warnings as the Ultrashield that I use now. And it seems to have LESS active ingredient, although it has a slightly different pyrethin so maybe you need less to be effective?

I was just surprised at the good reviews on a FB website that had brought up horsefly remedies, and I never knew such a thing existed. It can be used on chickens also. Seems if it was safe enough for them, it would be safe for larger livestock. I am going to try it, just curious if anyone else had.

I imagine it doesn’t look so good on dark horses, lol.

I would be more concerned about using this stuff around sensitive critters (like cats!) than straight up fly spray.

Cypermethrin is one of the active ingredient in Tritech 14. Can’t recall seeing it in anything else.

The dust is cheap enough to try, but just be careful where it winds up.

It does seem like the dust would be harder to apply and manage spread than a spray. I see myself “patting” it on vs “poofing” it on. I need to see how livestock owners actually use it. They can’t possible apply individually – and why do they choose to use it instead of a spray. A whole new rabbit hole!