Grey field ant

Systematic position: The species belongs to the order Hymenoptera, family Formicidae. Formica cunicularia is a common ant species widely distributed in open habitats, meadows, and agricultural areas, where it constructs extensive nest systems in the soil.

Target crops: While not a direct consumer of plant tissue, the grey field ant affects a broad range of agricultural and horticultural crops, including fruit trees, berry bushes, and vegetables. Its presence is generally associated with areas where sap-sucking insects thrive.

Biology and life cycle: Like all ants, this species undergoes complete metamorphosis (egg, larva, pupa, adult). Colonies are social and can be quite numerous, with workers actively foraging and expanding subterranean tunnels throughout the growing season. The species is highly adaptive to human-modified environments, including gardens and orchards.

Damage and harmfulness: The primary economic impact of this species is its symbiotic relationship with aphids. These ants provide protection for aphids against natural predators and move them between plants to maximize the production of honeydew. This results in heavy aphid infestations, nutrient depletion in plants, leaf curling, and the growth of sooty mold.

Control measures: Integrated Pest Management (IPM) is essential for controlling Formica cunicularia. Recommended strategies include:

• installing sticky bands or mechanical barriers on fruit trees to prevent access;
• using systemic insecticides for aphid control to remove the ants' food source;
• tilling the soil around crops to disturb nest structures;
• applying bait stations specifically targeting ant colonies to reduce their overall population.