Smash the aphids, they give off a smell that makes others not want to be there.
ISO and water some use 1 part ISO with 8 parts water, I use 50/50. Spray the plants with the lights off (dusk), start with the under side then the top side and soak the hell out of them. The ISO kills only the adults but not the eggs thus one must do this every 3 days (no more than 4) to kill the new hatch. This will need to be done at least 3 times, then watch very closely for a new hatch. This works as well as the spinosad products and leaves only water behind. Oh ya did I say ventilate the area while the alcohol evaporates?
Lady bugs are best, if this is outside, other things from mother nature also (praying mantis) predatory mites etc.