In response to what HumbleFarmer poster, regarding over labeled rates...

I would consider that area to be "non-cropland", or "fallow" - between crops- and treated as such.

I realize the Waterhemp is considered Glyphosate-resistant. However, I think there would be synergism between mixing Glyphosate and 2,4-D. So, I would probably use a mixture of both.  In fact, since there are no beans growing, I would expect more weeds to germinate and grow. So, I might think about adding in some residual to help keep weeds down the rest of the season. Which residual I would use would depend on what I plan to do next year. (Most likely in your area). My thoughts.