mold or insect infestation? - Ask Extension
I discovered these while spots on my magnolia bush. When taken off and squeezed, an oily black substance emerges.
Is it mold or insect? How do I ...
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mold or insect infestation? #879189
Asked July 29, 2024, 9:35 AM EDT
I discovered these while spots on my magnolia bush. When taken off and squeezed, an oily black substance emerges.
Is it mold or insect? How do I (and should I) deal with this to keep my plant and yard healthy?
Dakota County Minnesota
Expert Response
Thank you for writing.
That is classic magnolia scale. It is killing magnolias all over MN.
https://northerngardener.org/magnolia-scale/
Measures to treat it are described but in truth, magnolia is not succeeding in MN these days.
https://mortonarb.org/plant-and-protect/tree-plant-care/plant-care-resources/magnolia-scale-neolecanium-cornuparvum/
That is classic magnolia scale. It is killing magnolias all over MN.
https://northerngardener.org/magnolia-scale/
Measures to treat it are described but in truth, magnolia is not succeeding in MN these days.
https://mortonarb.org/plant-and-protect/tree-plant-care/plant-care-resources/magnolia-scale-neolecanium-cornuparvum/
