For what it's worth, I've kept a small Afghooey in clone in a party cup knowing that it was pretty heavily infested - Call it my 'control'.
Two waterings in a row of Azamax @ 1tbsp/gal on this plant definitely slowed them down, but their populations seemed to continue to rise bit by bit over the course of a week.
It started getting a bit out of hand, so just before I threw it out I decided to go with a last ditch root drench of Botanigard @ 1tsp/gal. It didn't seem to affect them at the time of treatment, but a quick check of the root ball the next day showed the same number of RAs except they were all dead. Not a spot of movement.
It's likely that this was due to the combination of Azatrol & Botanigard, but I thought it was worth mentioning...
Since then I've been alternating between Azamax and Botanigard, with a nice dose of Hygrozyme in between each to clean up the root zone between treatments. I don't know that they're all gone (in fact, I'm sure they're still in there somewhere), but I do know that my garden has never ever looked better.