Fungus-like Growth On Shrubs - Knowledgebase Question

Citrus Springs, FL
Avatar for romeokilo
Question by romeokilo
May 25, 1999
We have a fungal growth on our shrubs, and I have tried using a fungicide, with no result. It is light green in color, wispy or hairy, and is sort of like the stuff hanging from the trees in Florida (same sort of color as well), just on a smaller scale. Is there anything I can do, as it appears to be killing the shrubs?

Answer from NGA
May 25, 1999
What you are seeing is lichen rather than just a fungus. Fungicides will not control it. Lichens grow on plants but are not really parasites of the plants. They live on the dead outer bark and can also be seen growing on fallen branches, rocks, fence posts and old weathered lumber.

They often proliferate in a shrub or tree that is declining, as they like the increased light intensity that results from a thinning canopy of leaves. Thus they are often blamed for plant decline when they are more a result of the decline rather than the cause of it.

Anything that increases health and vigor (water, fertilizer, etc.) of the trees or shrubs will reduce the amount of lichen found growing on the plant.

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