I am one of the Foresters that stoneypoint refers to. There is no Pine selective herbicide, IE one that selects only pine to KILL. YOu could use a wick or bursh aplicator device that would touch only pine or if they are that many of then you could spray the whole area with glyphosate and kill everything and let it all start back killing the pines as they go. I would bushhog if at all possible it will kill them.
For all's knowledge pine will not "sprout" back if you cut if below the lowest branch, ie cut all the green of. There is exceptions to this, they are Shortleaf pine, Pinus echinada (sp) it will stump sprout as well as pond pine (which there is no way that you have this species anywhere near a quarry in the hills, it is a flatwoods species) , these two species are the only species to epocormis sprout or branch also.
At the chance of sounding politically incorrect i will still say it. Find a mexican crew who does forestr work like TSI (timber stand improvement) or tree handplanting etc, they will do this with those brush cutter weed-eaters, we have them on the land that we manage do this as TSI and cut all the pines back to a 10x10 spacing about 460 TPA (trees per acre) down from the start of about 2000TPA. NO there usually not illegal its not my job to check anyhow, but many of these workers are seasonal and get those temp visa for farm/forestry work, they travel throughout the south planting different tracts as they go. Most will work for a larger reputible company not for themselves.
