I have tried it...there is no risk to the plant providing it is not sprayed on the flowers.
I have even used the 70% alcohol before with no problems encountered....just as long as it drys quickly and doesn't sit wet for a long time. Someone at the society even suggested spraying them with the alcohol first to "weaken" them, then once it has dried to spray End-All (contains canola oil) to kill them completely.
My biggest problem seems to be with mealy bug right now. Grrrrr!