Sooty Mold

Sooty Mold

Joseph OBrien, USDA Forest Service, Bugwood.org

Description

Sooty Mold is a black fungus, caused by several different fungi, that grows in honeydew secretions left by insect pests like ScaleWhitefly and Aphids. Sooty mold can form on leaves, fruit and stems, and is common on many types of plants. Sooty Mold growing on the topsides of leaves interferes with photosynthesis by blocking sunlight. Along with the honeydew, it is sticky and drips from trees in summer heat, making a mess of walkways, cars and pavement. Left untreated, it can lead to stunted growth and premature leaf drop. In order to control Sooty Mold, you have to control the insect pest secreting the honeydew