UC IPM Online UC ANR home page UC IPM home page


SKIP navigation


How to Manage Pests

Pests in Gardens and Landscapes

Ant management

Ants can increase problems with honeydew producers such as soft scales, mealybugs, whiteflies, and aphids. They can protect these pests from natural enemies and move them around the plants, enhancing an infestation. A long line of ants going up a tree trunk is a clue that there may be a problem. Ants also can disrupt the biological control of some non-honeydew producing pests, such as mites and armored scales.

Deny ants access to plant canopies by pruning branches that provide a bridge between buildings, other plants, or the ground, and applying sticky material to trunks. Do not apply material directly to the bark of young or thin-barked plants or plants that have been pruned, as the material may have phytotoxic effects. Wrap the trunk with a strip of fabric tree wrapper duct tape and apply the sticky material to it. Remove the old wrap or tape and apply new material as needed to prevent girdling injury to the trunk.

One way to control ants is to use toxic baits. Baits in the form of ant stakes or traps can be an effective way to get poison into the nest. Ants are attracted to the bait and carry portions of it back to the nest where it is given to other ants. Place traps where ants can easily find them but away from small children. Control with baits may take several weeks or more to be complete. Effectiveness varies with ant species, bait material, and availability of alternative food.

For more information on managing ants, see the Ants Pest Note.

Ants tending woolly aphids
Ants tending woolly aphids

A refillable ant bait station
A refillable ant bait station

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2016 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /PMG/GARDEN/CONTROLS/antmanagement.html revised: September 20, 2016. Contact webmaster.