Leafcutter ant

The leafcutter ant Acromyrmex laticeps belongs to the family Formicidae and the order Hymenoptera. This species is recognized as one of the most destructive agricultural pests in South America, known for its highly complex social structure and specialized foraging behavior.

This pest does not consume the vegetation directly; instead, it uses the plant material as a substrate to cultivate a specific fungus. Foragers cut fragments of leaves, flowers, and stems from a wide variety of plants, including citrus, legumes, and field crops, transporting them into subterranean chambers.

The biology of the species involves a caste-based system led by a queen. Within the nest, the ants process the plant material to create a garden for symbiotic fungi. This fungal mat serves as the sole source of nutrition for the entire colony, including the developing larvae.

Damage to crops is often sudden and severe. Long columns of ants can defoliate entire trees or garden patches within a few hours. This leads to reduced photosynthetic capacity, stunted growth, and can ultimately result in the total death of the affected plant species.

Control measures rely heavily on the use of toxic baits that foragers mistake for food and transport deep into the nest, eliminating the queen and the colony. Mechanical barriers around tree trunks are also employed, along with targeted fumigation of nest sites to prevent further population spread.