OT: seeking an "everything" killer- weeds, brush, small trees?

HD, garden centers, hardware stores, all have products that are specifically targeted at killing brush. That's what I'd look for. Weed B gone isn't going to be very effective because it's a compromise, it has to kill weeds, but not kill grass. Roundup/glyphosate would be a big improvement, but for brush, the brush killer products are a big improvement over that too.

I've used this with good success. I mixed it with water in a pup-up garden sprayer. Just used a few ounces so far.

Me too, store brand glyphosate in a pump-up sprayer. I won't see effects for maybe a week, and a tree will require one or more subsequent applications.

I have some Weed B Gone. So far I haven't found the kind of weeds it works on.

In Ortho, get the Brush B gone. Active Ingredient Triclopy

That is basically home owner grade Garlon. It is good on leafy and woody plants. It may kill a lot of grasses but cogan grass just laughs at it. (a particularly invasive 6' tall grass in south Florida) It is effective on most trees, cut stumps, vines etc.

Orange agent. You know what it is.

Actually, a couple of weeks back, this is what I tried first. I bought a spray called Bayer Advanced which already had like 1% triclor, then I added a couple of bottles of higher concentration to increase the percentage. I couldn't find Brush B Gone, so this was my next option. Anyway, it selectively killed as you seem to point out, but I wanted a kill all, so bought and used the Roundup concentrate yesterday.

Thanks again to everyone responding here.

Sam