Dothiorella leaf blight which is really a whole range of fungi that cause leaf diseases, along with cankers and wilts goes to many different host plants from citrus to Brazlian pepper to ash to redwood to palm to pittosporum to eucalyptus to pine. Look around, this year you'll see lots of it because it results from water and salt stress.
Images: ash, redwood, avocado, lemon, palm, pistachio, blueberry