Ant Tetramorium tonganum

Systematic position: The ant Tetramorium tonganum belongs to the order Hymenoptera, family Formicidae. Recognized as an invasive species in various parts of the world, this ant is known for its ability to establish large, persistent colonies that disrupt local ecosystems and pose significant challenges to agricultural operations.

Host crops and impact: This species is a frequent visitor in orchards and horticultural fields. It affects a wide range of fruit trees, ornamental plants, and vegetable crops. The ants do not directly consume large parts of the plant but cause damage through their mutualistic relationship with honeydew-producing insects like aphids, scales, and mealybugs.

Biology and development: The life cycle progresses through egg, larva, pupa, and adult stages. These ants are known for their high reproductive capacity and the ability to form supercolonies. Their nests are often located in soil, leaf litter, or decaying organic matter, which provides them with stable microclimates for year-round development and rapid expansion.

Nature of damage: The damage caused by Tetramorium tonganum is primarily indirect. By protecting honeydew-secreting insects from natural predators and parasitoids, the ants enable aphid populations to reach outbreak levels. This leads to severe sap loss in plants, the development of sooty mold on leaves, and an overall decline in plant vigor and crop yield.

• Application of bait stations containing slow-acting insecticides to target the colony.
• Installation of sticky barriers on tree trunks to prevent ants from accessing the canopy.
• Integrated management of honeydew-secreting pests to reduce the ants' food supply.
• Regular inspection of crops to identify and treat early nest development in the soil.
• Use of selective systemic insecticides compatible with regional pest control guidelines.