How To Treat Scale On Magnolia Trees
How to Treat Scale on Magnolia Trees. Magnolia scales are scale insects of various colors, from light to dark. Magnolia trees and bushes are susceptible to this scale, not to be confused with black scale, which refers to a very specific species (Saissetia oleae) that attacks citrus and olive trees. Nevertheless, both are unarmored scales and the treatment for them is the same. Magnolia scale insects are mobile only during the crawler, or nymph, stage. They insert their mouthparts into the plant and don't move thereafter, feeding out of the same hole in the tree the rest of their lives.
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