Identifying and Treating Scale Insects on Ficus Trees

Overview

Scale insects are tiny (pepper-grain sized) and easily overlooked, but their feeding causes secondary symptoms that reveal an infestation. Recognizing these signs lets you target the root cause rather than chasing recurring symptoms.

Leaking Sap and Ants

Scales feed on sap, causing the tree to weep sticky resin from feeding wounds. The insects also excrete honeydew, which attracts ants. If you see sap or ants, dab affected areas with a rubbing alcohol-soaked cotton swab, then spray the entire plant—including leaf undersides—with neem oil to prevent reinfestation.

Sooty Mold

Honeydew fuels sooty mold, a black powdery fungus. Remove heavily coated leaves and discard. Swab remaining surfaces with alcohol and treat with neem oil to eliminate the underlying scale.

Mealybugs: A Severe Scale Relative

Mealybugs can kill a plant if unchecked. For light infestations, swab with rubbing alcohol. For heavy outbreaks, spray with diluted soap to break down their waxy coating, then shower the plant with lukewarm water. Isolate the ficus until the infestation is gone.