Knowledgebase
Magnolia Scale #876189
Asked July 07, 2024, 12:35 PM EDT
Auglaize County Ohio
Expert Response
Although we may not recommend specific brand products, we may make referrals to fact sheets that do. The University of Kentucky Department of Entomology lists numerous systemic pesticides such as you have been using: https://entomology.ca.uky.edu/ef431. This fact sheet also suggests horticultural oils and soaps, and their limitations. PennState Extension has a brief discussion of magnolia scale, showing the timing of the various stages: https://extension.psu.edu/magnolia-scale.
For any pesticide you use, please note that both fact sheets advise reading and following label instructions for selection of an appropriate product and for its application.
Thank you for your question.