Spots, yellow leaves and dropping leaves on Brugmansia
I have a 1 year old Brugmansia in a pot. Its about 3 feet tall with about 18 leaves. It's 1 stalk in a tree shape. For the last month it has been losing its lower leaves. One at a time they develop spots, turn yellow and drop off. I have sprayed the plant twice with Sevin. This is my first plant of this type. The link is to a photo of the lasted dropping leaf.
Here is a link that might be useful: