Sooty mold
Common name given to a condition that is not truly a disease, but a black coating on leaves, branches and fruit made up of a fungal growth that is usually dark colored and powdery-like, giving it the name sooty mold. These fungi are saprophytic, that is, they do not feed on live plant tissue, but rather thrive on insect secretions, known as honeydew, that are high in sugars.