Emmy from San Francisco writes
The magnolia tree has dark black bark which we were told is fungi
The mixture rate for Monterey Agri-Fos Systemic Fungicide is dependant upon what exact disease or fungus you are treating. Complete instructions on the product label. If you are not certain of the disease we would recommend contacting a local arborist or master gardener at your local cooperative extension office.
Answer last updated on: 10/15/2021
