I have attached a picture of my magnolia branch. Some time late summer, (in August), branches started developing these little bumps. They look like drippings. I noticed that there were a lot of flies and wasps flying around under the tree. Is this normal or is it a fungus of sort? How can I treat it?
Scale insects. Often best controlled by applying suitable insecticides during the crawler stage, when the tiny larvae are out in the open and moving around. You have to find out when this is likely and attack them at this time. Adults tend to be protected from pesticides by their scales.
