When we built our house we just put sod in the front.. now we are going to be closing in the back however our whole backyard is covered in stickers, weeds and sunflowers.... how do I get rid of them? Do I just put round up to the whole backyard or is there another way? Also what can I put to kill any bugs,critters and fleas and possible ticks that might be back there? FYI it is a regular sized lot so the backyard is not a 1/2 acre or anything like that..!!!