Q.How can you get rid of black mold on orange trees?
My orange tree has produced for the last two years until this year when unusually cold weather and wind knocked the blooms off. Then it got black mold on the leaves. The mold has been there for a few months. Can I still get rid of it and make my tree healthy?
The black mold is most likely sooty mold, which grows on the sticky honeydew excreted by scale insects. (Other insects in the same family, aphids and mealy bugs, also excrete honeydew, and treatment for them is basically the same.) You can wash off the sooty mold, but unless you get rid of the bugs, it will come back again. Also, the bugs are the ones that damage the plant. This article has more information: https://www.gardeningknowhow.com/plant-problems/disease/how-to-get-rid-of-sooty-mold.htm