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English Name

Sooty mold

Description

Sooty mold is a black substance, coating orange tree leaves and fruit. It looks like mold and wipes off easily. The mold can live on a plant's natural secretions but the likely cause for the mold's presence is honeydew secreted from sucking insects such as aphids, mealybugs, psyllids or scales. Any plant with these insects present is at risk of developing sooty mold.

Infects

Trees

Tips

For small sooty mold infestations, simply wiping the leaves will get rid of the mold and the insects.

Symptoms

Areas that frequently have cool, moist days are at higher risk for sooty mold than other areas. The mold in sooty mold does not cause a plant disease.

Control

The key to control sooty mold is controlling the sucking insects. First give your plant or tree a good hard spraying of water to wash away some of the mold and insects. To treat a large tree, add 4 ounces of dish-washing liquid to a hose end sprayer and spray the tree early in the morning. Always check a plant for burning before using soap spray, but most shiny leaf plants can tolerant soap.



Did you know?

Carrots actually come in a range of colours. White and yellow carrots come from Europe, and purple ones come from the Middle East. The orange ones are a fairly recent invention, created by crossing various other colours.