Tessmann's fruit fly

Carpophthoromyia tessmanni is a species of fruit fly belonging to the family Tephritidae, within the order Diptera. This insect is primarily recognized as a significant agricultural pest in tropical regions, specifically known for its role in destroying fruit crops and creating serious economic challenges for local orchard management.

The primary hosts for this pest include various tropical fruit-bearing trees and plants within the cacao family. The larvae are highly specialized feeders that concentrate their activity within the fruit tissue. By consuming the inner parts of the fruit, the larvae render the harvest entirely unmarketable and unsuitable for human consumption or processing.

The life cycle follows a complete metamorphosis, consisting of egg, larva, pupa, and adult stages. Females use their ovipositors to deposit eggs directly beneath the skin of ripening fruits. Once hatched, the larvae tunnel through the fruit pulp, which accelerates decay and provides entry points for secondary pathogens like bacteria and fungi.

The damage caused by this pest is characterized by internal rotting, dark skin discolouration, and visible holes where larvae have exited. Infected fruits often drop prematurely from the tree. Due to the internal nature of the infestation, detecting the presence of these larvae before it is too late is a major challenge for farmers.

Integrated Pest Management (IPM) strategies for this species focus on a combination of cultural and chemical controls. Key methods include the immediate removal and destruction of fallen fruits to break the life cycle, the use of pheromone-based traps to monitor populations, and targeted insecticide applications to prevent egg-laying during the fruit ripening season.