Thing is Ortho Orthene is a bait driven poison i.e. you need ants to take it in to the queens - not all die at the same time and so its evacuation thru the tunnels to another spot and start over. I found using it gave them time to build another nest with the survivors.
Talstar / Bifen is fast and the liquid version gets into the tunnels so theres nowhere to run nowhere to hide. It has a residual effect also so no ones building another nest in that spot again. The dry version not so much but thats what the pest control people use around the house outside if its gonna rain. So I have both. Having a powerful stream is also a good idea to dig a hole and open up the tunnels to get the solution in there. Or you can use a metal rod and slam it into the nest and pour the stuff in. I don't get spin offs from these nests - they are dead overnight. I have about 5 acres of lawn so broadcasting isn't practical. I bought a powersprayer and load it up then drive around with the ranger and take out each nest when they get big enough. In fact I'm about due now.
I spray with a 3 point sprayer on my little Kubota. Spray heavy around the perimeter of the house foundation with talstar too.