Leaf spot in Brugmansia
Both bacterial and fungal leafspot of Brugmansia can be recognized by numerous angular spots on the leaves. Initially, the spots are water-soaked. Leaves infected at an early stage become deformed. Often, the margins of affected leaves are rimmed with a narrow band of necrotic tissue. Infected leaves drop prematurely.Spots can also appear on the flowers and less often on the seed pods.Be especially watchful during cool, moist weather.While both of these diseases are unsightly,neither is likely to kill the plant.Leafspot may over winter in soil and debris around the base of plants.Good hygiene is the first step in controling both types of this disease.

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Country Garden
For homeowners, several fungicides may be used to aid in disease management. These include fungicides containing captan,and/or copper,
and products available from your garden supply store.Two that we use with good results are "Orthenex"systemic and "Serenade",both available from Walmart.
Leafspot closeup