So far we have had good control with a high rate of glysophate but I had to rescue some conventional beans this year with the cultivator after 12 oz of Cobra just made the waterhemp mad.  I don't really enjoy cultivating beans but I see the day coming (and soon) when we will be doing alot of it. 

We had Invive down as a pre on most of our beans this year but on the early beans 20" of rain in June washed it away and on the later beans we didn't have enough rain to keep it activated so it was pretty much a waste of money.