This website sells professional grade products that the pros use. Read the guides and the reviews on the product and and go from there. I effectively knocked out hundreds of fire ant hills in my yard and now have zero fire ants. Also learned how to spray my house quarterly for spiders and roaches and other bugs and have a nice bug free house now.
https://www.domyown.com/ants-c-1.html
Agree ^^^ professional grade products.
Concentrations are much greater per container than consumer stuff which means that you use far less solution when mixing with water so cost per application isn’t as expensive as you might think.
These are two I am using now, the small container I use as a special use recently for Aphids in Crypt Myrtle trees since it treats the base of the tree, the tree takes it up through the roots and kills them when they feed on the tree. The mix is only .6 oz per gallon of water. ( 6 tenths of an ounce)
The other large I use for perimeter spray, lawn insects and mosquitos once a month.
Both can also be used for termite barrier.
The mentioned Termidor SC is another well known and very respected that I will switch two in a couple years. Meaning over a long period of time some insects will build resistance. Most likely the stuff you buy in stores first since they are widely used.
Get yourself an Ortho 2 gallon sprayer and some gloves.
Yes if this is going to be a one off thing the big box stores sell the stuff with same active ingredients however it is much less concentrated so you use more.
Most people get pest control companies I have always done my own in every house. Never had termites and never carried a termite bond. Only recently after decades did I start using “do my own” I always bought consumer products in stores.
Some of it is the same ingredient just less concentrated so you use more in the mix.
Treat all chemicals with respect and follow directions.