Yes. Main drive is the goosegrass. It's 97 percent of the total weed population I have.
Would you do a full amount in fall, or wait to use it in the spring?
I was thinking half app of granular prodiamine end of sept, and then half oxadiazon in feb and April. Since goosegrass germinates later the April would give me the overlap, of course soil temp dependent.
Or would one be advised to use the oxadiazon in march and do a full app and call it done?
If you have an area that is in need of repair that I can understand going with Ronstar. However, if you're just looking for goose grass control specticle / indaziflam may be something to consider.
I believe the liquid version or even the WSP of indaziflam is significantly cheaper than the granular version, In terms of cost per application.
Barricade is going to be absolutely the cheapest out of all the options.
Approximate price per application per acre:
Prodiamine 65 WDG $13, yes $13.
Ronstar G $400
Ronstar Flo $200
Specticle G $560
Specticle Flo $140
Keep in mind, each product lasts a different amount of time per application, and that research was beyond the scope of my interest at the moment.
If your yard has a bunch of damaged areas that you're trying to fill in, then maybe Ronstar is the right choice.
If your yard is really established and you're just trying to fight back the goose grass, consider indaziflam if the prodiamine isn't doing the job. If you haven't given prodiamine a chance, you may want to for the sake of your wallet; the choice is yours.