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Severe scaling on Magnolia tree - Ask Extension

We have severe white scales on our Magnolia. It’s twenty years old. What is the quickest and most affective treatment? Thanks

This work is supported in part by New Technologies for Ag Extension grant no. 2020-41595-30123 from the USDA National Institute of Food and Agriculture. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the view of the U.S. Department of Agriculture.