Coffee fruit fly

The coffee fruit fly (Trirhithrum coffeae) is a significant pest of the coffee plant, belonging to the family Tephritidae, order Diptera. It is primarily known for causing severe economic damage to coffee production in various parts of Africa, representing a major challenge for local coffee farmers and exporters.

This species specifically targets coffee berries (Coffea spp.). The adult flies are attracted to maturing berries, where they deposit eggs. The host range is relatively narrow, focusing on commercial coffee varieties, which makes it a high-priority concern for agricultural quarantine services and plantation managers.

Regarding its biology, the life cycle consists of four distinct stages: egg, larva, pupa, and adult. Eggs are laid beneath the berry skin. Upon hatching, the larvae tunnel into the pulp, feeding on the developing fruit tissue. Pupation typically occurs in the soil beneath the host plant, allowing the insect to survive and re-emerge when environmental conditions are favorable.

The damage caused by Trirhithrum coffeae is characterized by premature fruit drop and visible scarring on the berry surface. As larvae feed inside the bean, they compromise the physical integrity and quality of the coffee bean. This leads to substantial yield losses and forces farmers to implement rigorous sorting processes to remove infested berries.

Effective management strategies include:

• Cultural practices such as clean harvesting and the destruction of dropped or infested berries to break the lifecycle.
• Monitoring the population density using pheromone traps or food-based attractants.
• Targeted application of insecticides to manage adult fly populations before egg-laying occurs.
• Encouraging the presence of natural enemies, such as parasitic wasps, to suppress fly development.