The milkweed has white flowers and appears to be healthy otherwise. Also, we aphids are terrible this year so I am going to try some of the ideas here for getting rid of them too. Which is it? I hadn’t seen any insects on the plant prior to the leaves disappearing. I have several flower beds and have never had a bug/caterpillar problem. I can remove leaves, but will be removing eggs, sadly. I set up an album of pictures at to show you.

Do you have any idea on what is doing this?