Formica subsericea ant

Systematic position: The Formica subsericea ant is a member of the Hymenoptera order and the Formicidae family. It is a common species in agricultural ecosystems, known for its ability to adapt to human-disturbed landscapes and cultivate aphid colonies.

Crops affected: This ant species frequently targets various horticultural crops. It is particularly problematic in fruit orchards, berry plantations, and vegetable gardens where it promotes the growth of aphid populations on crops such as tomatoes, peppers, and ornamental flowers.

Biology and life cycle: Like other members of the genus, Formica subsericea colonies consist of a queen, workers, and brood. They build extensive nest systems in the soil, often located at the base of plants or under garden structures, and remain active from early spring through late autumn.

Damage and harm: The primary harm is indirect. Formica subsericea acts as an attendant to aphids, protecting them from natural predators like ladybugs. By farming aphids for honeydew, they allow the aphids to thrive, causing severe sap loss, leaf curling, and the spread of plant viruses.

Protection measures: Effective management strategies include:

• Applying sticky barriers to the trunks of fruit trees to prevent access.
• Using bait stations with slow-acting gel insecticides.
• Regular soil cultivation to disrupt nest integrity near plant roots.
• Implementing strict aphid control programs.
• Maintaining garden hygiene by removing debris that provides shelter for nests.