Magnolia Scale is a soft brown insect that can kill trees if abundant. Feeding injury causes honeydew, sooty mould and twig dieback. The honeydew attracts bees, wasps and hornets. Magnolia scale overwinters as partly grown young, and begin feeding in spring and summer. Adults may be brown or mottled orange, with shallow wrinkles. By late August most of the females have produced nymphs that migrate to and settle on the new growth of a twig, where they start the cycle again. Depending on how badly infested a tree is, it could take several years to gain control.
Call Four Seasons Tree Care to set up a treatment program for your trees and shrubs.