Man, I had some kind of spider in my butterfly bush that was destroying it. I sprayed the plant down with soap/water mix. Removed the webs. Gave it a good haircut. It's looking much healthier. Maybe the spider was in there eating another pest. I don't know. I did notice that it was really struggling where there was spider webs though. All of my purple flowers turned brown and faded out. They're coming back though. Prob not the answer you're looking for.