Vastlan looks to be a Tricrlopyr variant?
Also, my biologist sister let me know it’s more likely Chinese Sumac aka Tree of Heaven. She’s a full blown lib, so we don’t talk much, but as I had other business, I thought I’d bring it up.
My plan is to Glyphosate all the bush sized plants, And Vastlan/Triclopyr the tree sized plants as I cut them down. Looks like I have a project for next week, as I’m even a bit late to the party.
Scott