Aphidoletes thompsoni

Systematic position. Aphidoletes thompsoni belongs to the order Diptera and the family Cecidomyiidae (gall midges). While some species in this family are known as predators, A. thompsoni requires careful identification and observation to differentiate its impact on agricultural and horticultural crops within specific geographical regions.

Host plants. This pest is known to affect various fruit trees and ornamental shrubs. It often seeks out plant species where microclimatic conditions favor the development of its larvae. Roses, in particular, and other Rosaceae family members serve as primary hosts where the pest can establish significant populations if not properly managed.

Biology and life cycle. The life cycle consists of the egg, larval, pupal, and adult stages. Adult gall midges are small, delicate flies. Females lay their eggs near potential feeding sites. Larvae undergo several instars while developing on the host plant, and pupation typically occurs in the soil or protected leaf crevices, depending on the environmental conditions.

Nature of damage and harm. The larvae are the primary damaging stage. They feed on plant tissues, causing stunted growth, leaf deformation, and reduced overall plant vigor. The damage creates entry points for secondary infections such as fungi or bacteria, which can lead to premature leaf drop and significant losses in plant quality and aesthetics.

Control measures. Managing Aphidoletes thompsoni requires an Integrated Pest Management (IPM) approach. This includes regular scouting for adult activity, maintaining proper sanitation by removing infested plant parts, and using targeted insecticides when necessary. Monitoring with sticky traps is highly recommended to track population surges and determine the optimal timing for interventions.

• Regular inspection of the underside of leaves.
• Removal and destruction of infested shoots.
• Use of yellow sticky traps for monitoring.
• Application of selective insecticides during active flight.