Ants

Ants of the genus Formica belong to the order Hymenoptera and the family Formicidae. Within the agricultural context, they are recognized as significant secondary pests that indirectly damage crops by fostering the growth and survival of sap-sucking insects like aphids, scale insects, and mealybugs.

These insects affect a wide variety of plants, including fruit trees such as apple and pear, various berry bushes, and greenhouse vegetables. Their presence on a plant usually indicates an underlying infestation of pests that the ants are actively farming for their sweet honeydew secretions.

The biology of Formica is based on complex colony structures, with nests located in the soil, under mulch, or within decaying wood. Their cycle is continuous throughout the growing season, and their tunneling activities can physically disrupt the root systems of young seedlings and transplants.

The damage caused is primarily metabolic and pathological. By protecting aphids from natural predators like ladybugs, ants ensure the survival of these sucking pests, which drain sap from plants, cause leaf deformation, and promote the growth of sooty mold, effectively suffocating the plant's leaves.

• Applying sticky barriers or grease bands on tree trunks.
• Using targeted, slow-acting bait stations to eliminate colonies.
• Controlling aphid populations to remove the ants' food source.
• Regular cultivation and soil turning to disrupt underground nests.
• Using companion planting with aromatic herbs to repel foragers.

Successful management requires an integrated pest management (IPM) approach. Rather than attempting to eradicate all ants, focus should be placed on creating barriers around susceptible crops and reducing the aphid populations that attract the ants to the canopy of the plants.