The aphids are Oleander aphids. I teach organic vegetable gardening and I've always encouraged people to tolerate these aphids as a way to bring in beneficial predators. I was, however under the impression that they only had 3 host plants. (Oleander, Milk weed and Mandevillea) Now I know better. FUN FACT: I once fed some of these aphids to a hover fly larvae and got to watch him change color from Green to Mustard as he consumed them all! Too fun.
