Aphid midge

Aphid midge (Phaenobremia aphidimyza, taxonomically often referred to as Aphidoletes aphidimyza) is a beneficial predatory insect belonging to the family Cecidomyiidae within the order Diptera. While this article follows your categorization, it is essential to clarify that this insect is not a pest, but rather one of the most effective natural enemies of aphids used in greenhouse biological control programs.

The systematic position of this organism is within the order Diptera (flies) and the family Cecidomyiidae (gall midges). Unlike many other gall midges that form galls on plants, Phaenobremia aphidimyza larvae have evolved to be specialized predators that feed exclusively on various aphid species.

The aphid midge targets a wide variety of aphid species that infest greenhouse vegetable crops, such as cucumbers, tomatoes, and peppers, as well as many ornamental flowering plants. Its efficacy is high because the larvae hunt actively, moving within the aphid colony to paralyze and consume the pests.

The life cycle begins with the adult midge laying eggs near aphid colonies. Once hatched, the larvae inject a paralyzing toxin into the aphid and consume the body contents. The cycle is completed by pupation, which usually takes place in the soil or growing medium. The speed of the cycle depends heavily on temperature and day length.

Management techniques for utilizing aphid midges focus on preventive and curative releases. To ensure success, growers must maintain proper soil moisture for pupation and strictly avoid synthetic chemical insecticides that are harmful to the midges. By integrating these practices, growers can maintain aphid populations below the economic injury level.