Lawn and Turf: Ants
Photo by: A.L. Antonelli
Biology
Ants are primarily a nuisance pest in lawns. Occasionally, they may kill the grass, causing an aesthetic problem.
Various species may occur in lawns, including harvester ants which can have a severe sting.
Management Options
See "Using Integrated Pest Management (IPM) in the Landscape" for successful problem management techniques.
Non-chemical Management
Select non-chemical management options as your first choice!
- Repeated flooding of infested areas can drive ants out of their nests and force them to relocate. Flooding must be done every few days until the ants move.
- Tolerate ants when possible, as they can be beneficial insects.
Chemical Management
IMPORTANT: Always read and follow label directions when working with pesticides.
For more information on using pesticides visit :
- Effective ant control normally requires destruction of the queen. In most cases, this necessitates one or more applications of a liquid or granular insecticide.
- In situations where only a few colonies are present, apply insecticides directly to colony openings and the areas immediately surrounding the mounds.
Approved Pesticides
If you choose to use a pesticide, some examples of products that are legal in Washington are listed below. Some products are labeled for just INDOOR or just OUTDOOR use, or may allow both uses. Be sure to choose a product appropriate for your situation. Always read and follow all label directions.
Additional Image
Photo by: D.G. James
WSU Extension programs and employment are available to all without discrimination.
Evidence of noncompliance may be reported through your local Extension office.