The Leafcutter Ant (Acromyrmex versicolor) is reddish-brown; covered in spines and typically measures ⅛–½ inch (polymorphic). The desert leafcutter ant (Acromyrmex versicolor) is one of Arizona's most fascinating and destructive ant species. Workers cut circular pieces from leaves, flowers, and stems and carry them in long,.

The Leafcutter Ant poses a moderate risk. Can cause severe damage to ornamental plants, gardens, and citrus trees — entire plants can be defoliated in a single night. Not medically dangerous; rarely bites unless handled.

In Arizona, leafcutter ants are most often encountered in the following situations: Long columns of ants carrying leaf fragments, often visible at dusk or dawn. Circular cut marks on plant leaves. Large, multi-entrance mound systems in open soil. Defoliated plants near the nest.

The Leafcutter Ant is most active during: Year-round; most active spring through fall; foraging at night and dawn. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.

Inspect plants regularly for cut marks. Treat mounds early before colonies grow large. Apply sticky barriers around tree trunks to prevent climbing.

Granular bait specifically labeled for leafcutter ants placed along foraging trails and near mound entrances. Multiple applications required for large colonies. Professional service recommended.

Most store-bought ant sprays kill only the workers you see, while the queen and colony remain protected underground. Effective Leafcutter Ant control requires baiting or targeted colony treatments that workers carry back to the nest. Pest Control Bros uses professional-grade products and application methods that address the entire colony.