I currently have indoor potted basil and peppermint plants. Unfortunately, aphids have taken up residence in the peppermint and are spreading to the basil.
Several internet sources say that rubbing (isopropyl) alcohol can be used to kill aphids, by using a cotton-swap doused in alcohol to rub them away.
My worry is that, I plan on eating some of the leaves of the basil and peppermint plants, either chopped up in dishes, or used to make tea.
Will the alcohol be absorbed by the plant, and if so, will it make them poisonous to eat? Or is it safe to use rubbing alcohol for pest control on edible plants?
An alternate idea I had was to use artificial vanilla extract, which contains food alcohol (ethanol), but I don't know if this is a good idea.