Treating Sticky Honeydew on Ficus Trees

A reader named Tom received two large ficus trees, each about 9 to 10 feet tall. While the trees appear generally healthy, they are dropping some leaves and secreting a sticky, sap-like liquid onto the floor from the canopy area. Tom is unfamiliar with this issue and wants to keep the plants in a game room without damaging the flooring.

Identifying the Problem

The sticky substance is honeydew, the excrement of sap-sucking insects—most likely scale or aphids. In fact, the previous owner may have given the trees away because of this infestation.

Effective Treatment

The simplest solution is a systemic insecticide such as Bayer Advanced Tree & Shrub Protect & Feed (approximately $20 at Lowe's or Home Depot). Mix it with water according to the label directions and water the trees. The product moves through the plant's vascular system, killing existing pests and providing protection for up to a year.

Cleaning the Floor

To remove honeydew from hardwood or other flooring, wipe the area with towels soaked in rubbing alcohol. The alcohol evaporates quickly and will not harm the finish.

With consistent treatment, the ficus trees should recover and remain pest-free, allowing Tom to enjoy them in the game room without further mess.