I think I have the most stubborn waterhemp in my corn.  I sprayed my corn with Halex in mid May for the waterhemp, sprayed the waterhemp in early June with full rate r-up and then sprayed again in late June with full rate r-up.  Every time I spray I have a complete kill.  But each time it rains another new flush comes.   My sprayer even broke a few corn plants off on the last application because the corn was so tall, but I thought at that stage I would be done because the corn was so well canopied.  Now I see I have a new flush coming.  Anyone have any suggestions ?  I was thinking about a strong rate of calisto sprayed late, but I am concerned about carryover to soybeans.

In my beans I used Kixor product ( optil ).  I have sprayed my beans twice with rull rate r-up since and will probably have to spray again.  Every time I spray I get a great kill, but this is getting old.  I thought when the beans canopied the waterhemp would quit coming. 

TIA