University of Illinois Extension
University of Illinois Extension - Selecting Trees for Your Home
Sooty Mold
Numerous genus and species
Tortise scale crawlers and sooty mold on pine.
Severity: 3 out of 5
Frequency: 3 out of 5
Symptoms: Sooty mold fungi have black mycelium and grow on insect honeydew. The honeydew is excreted by certain types of scales and aphids. The thickness and black intensity can vary with the individual fungus as well as multiple fungi growing together.

As long as there is a sufficient amount of honey dew, sooty mold will grow - not only are plants affected but also cars, roofs, walls, patios and so on.

Management: Manage most sooty molds by reducing the insects which produce the honeydew.
Associated trees: