Leaves and fruit are covered with a shiny or sticky substance called honeydew. A black mold usually grows on the honeydew, and ants may be attracted to it. Tiny winged insects may be seen feeding on the foliage. They jump when disturbed. Portions of the leaf may blacken. Leaves turn yellow and may drop. Severely infested trees may lose vigor and bear less fruit.
These pests are often very hard to kill during the growing season. Apply an insecticide labeled for this pest, following label directions.