I let a lot of milkweed grow in my yard. In part it's for the monarch butterflies, in part it's so I can harvest the fibers, in part it's because I like the scent of the flowers. I've also enjoyed eating the young pods (carefully cooked) sometimes.

This year, the milkweed's been afflicted by a bright orange-yellow aphid called the oleander aphid.

(  beneath a cut in case seeing a whole lot of aphids isn't your thing  )

My approach to minor infestations of things has been to try to wash them off, but ...