It seems that everything loves Brugmansia. I often have a difficult time with spider mites, but my current problem is with snails. They have eaten most of the passion vine in the courtyard and every Brug has snail damage.
There are wee snails even inside of flowers.
I gathered a bunch of snails and placed them in our open recycle bin with the leaves they had been feasting on. I suspect that they will eventually die. I feel that I am giving them a chance to find somewhere else to live.