Black mold like on Holly’s, wax pivot and red tipped photuna

Asked May 3, 2018, 10:13 AM EDT

Any idea what this is and how to get rid of it please. Thank you. Melanie Matesic

Talbot County Maryland

1 Response

The black substance you see on the leaves is called sooty mold. We see that there are scale insects on the stems of your plant. Scale insects suck the plant sap and secrete a sugary substance called honeydew. The mold grows on the honeydew.

This looks like cottony camellia scale. You can manage this insect with the application of horticultural oil.