Q.What Is The Best Way To Treat Black Spot On An Indoor Ficus Tree. I Have A Pet That Could Come In Contact With Whatever I Use. The
tree is dropping leaves fast. It is a large tree, 35 years old, and is being treated successfully with systemic Bonide insecticide for scale. I could keep the cat out of the room for a week or so, but spraying inside seems a little bit risky. I have some Bonide Fung-onil, which has chlorothalanil and it, which I have read is necessary to get rid of black spot on ficus I Don’t know if this is true. Thanks for advice.
Certified GKH Gardening Expert
If you have scale, the black spots are probably sooty mold from the honeydew created by the scale. Once the scale are gone, you can wash off the sooty mold.