I am so sorry! According to the messages I've read these worms don't hurt my tree. I killed six of the ugliest worms I'be ever seen yesterday. They were eating all the leaves. Then I mixed a solution of dawn dish washing liquid and water and sprayed my tree till it was dripping. I didn't know I was killing beautiful butterflies. The worm is sooooo ugly and destructive. What is more, I don't know if the dawn solution does any good. Help!