Solanum carolinense is in the tomato/nightshade family (unrelated to the Urtica dioica nettle), and the flowers look similar (but white to pale purple). It bears a marble-sized berry (green turning yellow). It's difficult to kill by pulling, as it will grow back from the root. I've had fairly good results spraying with Roundup (or generic glyphosate), though it seems to take more than one application.

Discoqueen - it's an elder bush. Sambucus nigra - a very common self sowing native. You will need to cut it right down and then, if you can't dig out the roots, apply some sort of brush killer to the stumps. Before anyone says, why destroy an edible, these things are native here and sprout all over the place. They are a bit too common and a bit too large to tolerate in our small gardens.

I had to chime in! In the South (US) we call that a poke sallet bush. Yes, it is edible, BUT only the leaves and for a limited time. You have to find a plant early when the shoots (leaves) are new. Here’s the rule "once it starts turning red, it will kill you dead". The plant even has its own song "Poke Salad Annie". At one time you could purchase pre-cooked poke sallet in a can at the grocery store. It's cooked much like you would cook turnip greens or collard greens. I have one of my grandmother's old cook books from the 1930's and it has several recipes listed using poke "greens" Every bird known around here eats the berries, because just when you get your car washed, along comes a bird and poops purple on your car. As well as birds, raccoons, opossums and foxes will eat the berries, Apparently they are immune to the toxic chemicals. Poke sallet bushes are deer- resistant. Some kids would eat a five to ten berries on a dare. It didn't bother them, but they will turn your urine and poop purple. If you ate a lot of berries I'm sure you would get a terrible tummy ache. Native Americans used the roots to make a liquid and applied it to the skin to stop itching. While I haven't kept up with the studies Poke sallet antiviral protein PAP has been isolated from the plant. PAP is being tested to hinder the HIV virus in humans. It is being studied for possible therapeutic use for T-cell leukemia, lymphoma, and Hodgkin's lymphoma. Why would anyone eat it? Thanks to the critters that eat it then leave behind a poke seed, it’s multiplies fast and is everywhere. Poke sallet became one of the major food sources for the extremely poor living in the rural South. If you’re hungry and penniless, you’ll eat just about anything.

use a broadleaf weed killer. They're cheap. depending on where you are, overseed during the fall. Then spray preemergent weed killer several weeks after the new grasslings are established. Are you watering deeply? Tall fescue needs more water, fewer times a week. BTW, does that RTF grass actually spread into bald spots? I just seeded my lawn with that RTF stuff. But I think it's a gimmick. It was the cheapest tall fescue seed at home depot though, that's why I bought it.