Don't fuck around with root aphids. My experience was that the imidacloprid products didn't work well at all, I had to use Triazicide. It's got a decent PHI, but I didn't take any risks with that. I ultimately lost every mother and cutting taken trying to get those genetics back on track. RAs just fuck everything sideways. Others may be finding better results now that we're all so much more familiar with these little fucks, though, and my experience with them was several years ago. Lost some incredible cuts to those little bitches.
It is very, very toxic stuff. And with regard to mites, know that it *must* be rotated with at least one other miticide that uses a different mode of action (single site mode of action 'cides' are known to cause resistance, pretty damn quickly depending on the critter you're trying to kill). IIRC, it persists in plant tissues due to translaminar activity, but don't hold me to that.