I found this bug on my butterfly weed last year just as I was bringing it in for the winter so I cut it back almost to the ground. It came back beautifully and has been doing well all summer. I have been gone for 2 weeks and left the garden in my husband's hands. When I looked at the butterfly weed it was covered with the same bugs as last year but much earlier in the year. Anyone know what this is? Sorry my camera doesn't take great closeups.
If it's not a bad bug I'll just leave there since it matches the flowers so nicely. lol.
yes, it will wash them off but i've found that milkweed and aphids go hand in hand. you can't grow one without the other and though you wash them off, they'll be covered again in a day or two. they don't seem to hurt this particular plant at all...
as a side note, my Adenium (Desert Rose) gets aphids several times a year and i have sprayed with castile soap and water in the past but this last time, i just let them be. a few days later i wanted to check on them again and they were totally gone. some little bodies had a good meal!