top of page
Vineyard Ants

Ants are common in vineyards and include both pests and beneficial species. Of the pest ants, Argentine ants (Linepithema humile) are the most common and problematic in coastal California. They establish mutualistic relationships with sap-feeding insects; protecting these insects from natural enemies while feeding on honeydew, a sugary food source. This renders biological control less effective. Targeting Argentine ants (often with bait) is therefore key to integrated control programs for sap-feeding insects, such as aphids and mealybugs.

More information: UCIPM: Ants

Left: Argentine ants carrying ant larvae

Information adapted from materials by UCIPM, UCCE Napa, Bettiga et al. 2013. Grape Pest Management. Third edition. University of California, Agriculture and Natural Resources, Richmond, CA, USA.

Video:  Malcolm Hobbs

Learn More about Vineyard Ants

Ant ID

Monitor Ants

Ants and MBs

Identification of Common Ant Species in Vineyards

Click the images to find a downloadable dichotomous key for vineyard ants

Ant vineyard identification UCCE Napa County


Vineyard ant identification in Spanish UCCE Napa County


ID Ants

See these videos below to learn more about Argentine ant monitoring and managment

Click on the handouts below to download step-by-step instructions on how to:

Monitor Ants
bottom of page