Black shiny ant

Taxonomic position: The black shiny ant (Formica gagates) is a member of the order Hymenoptera and the family Formicidae. While often found in natural ecosystems, this species can become a nuisance in agricultural settings when it establishes nests near cultivated plants.

Crops damaged: This species is a frequent visitor to fruit trees, berry bushes, and various garden plants. It is particularly problematic in systems where soft-bodied insects, such as aphids, mealybugs, and scale insects, are present, as the ants actively protect these pests from their natural predators.

Biology and life cycle: Formica gagates undergoes a complete metamorphosis. The colony structure is highly organized, centered around a queen who lays eggs that develop into larvae, pupae, and finally adults. The colony survives the winter by retreating into deep soil chambers, resuming intense foraging and expansion activity as soon as soil temperatures rise in the spring.

Nature of damage and pest status: The primary harm caused by these ants is indirect.

• Promotion of aphid colonies leading to leaf curling and nutrient loss.
• Protection of honeydew-producing insects from beneficial ladybugs.
• Spreading plant pathogens through the movement of aphids between plants.
• Root disturbance caused by tunnel construction, often weakening young saplings.
• Interference with horticultural operations due to aggressive nesting behavior.

Control measures: Effective management of Formica gagates requires disrupting the symbiotic relationship between the ants and aphids. Applying non-drying tree bands prevents ants from climbing into the canopy. Additionally, using bait stations containing slow-acting insecticides is highly recommended; the foraging workers carry the toxic bait back to the nest, effectively neutralizing the entire colony including the queen.