Citrus fruit midge

The citrus fruit midge (Resseliella citrifrugis) is a specialized insect pest belonging to the order Diptera and the family Cecidomyiidae. It is known primarily for its destructive impact on various citrus crops, causing significant yield losses in commercial orchards around the world.

The host range of this pest is centered on species of the genus Citrus, including mandarins, oranges, and lemons. The larvae are particularly damaging, as they specifically target the fruit during its development, leading to serious physiological and economic consequences for growers.

The biology of the citrus fruit midge is tightly linked to the phenology of the trees. Adult females lay their eggs in the rind of developing fruit. Once the larvae emerge, they tunnel into the interior, feeding on the albedo and pulp. The insect undergoes multiple generations per season, allowing it to rapidly infest an entire orchard if environmental conditions are favorable.

The damage caused by this midge leads to fruit drop, internal decay, and secondary fungal infections. Farmers often identify the infestation by observing the following symptoms:

• Visible necrotic spots on the fruit surface.
• Premature yellowing and dropping of unripe fruit.
• Soft, decaying patches on the fruit flesh caused by larval feeding tunnels.

Management strategies require an integrated pest management (IPM) approach to be effective. Key measures include maintaining orchard hygiene by removing and destroying fallen fruit, which acts as a reservoir for pupation. Chemical control via targeted insecticide applications during the peak flight of adults is recommended, provided that application timing adheres to safety protocols to minimize impact on beneficial insects.