Tropicals & Tender Perennials: Spots on Brug leaf, 1 by gardenquilt

gardenquilt wrote:
My daughter has a 2 year old brugmansia in her front yard in Santa Cruz. She lives 1/2 block from the ocean. The plant is watered on drip irrigation (no sprinkling) and not overwatered. Brown spots have developed on several of the leaves, causing the leaf to turn yellow then brown. She has been removing the spotted leaves. Does anyone know what this is or what should be done about it? I can't find anything in my garden books.
Thanks.