Neotephritis

Neotephritis is a genus of insects belonging to the family Tephritidae (fruit flies) within the order Diptera. These flies are recognized as specialized pests that primarily target the flower heads of plants in the Asteraceae family. Their interaction with host plants makes them a notable concern for both professional nurseries and home gardeners growing composites.

The damage is caused by the larval stage of the insect. Female flies lay eggs into the developing flower buds of host plants. Upon hatching, the larvae burrow into the flower head, feeding on the developing ovules, florets, and receptacle tissues. This internal feeding process destroys the floral structure and often prevents the plant from producing viable seeds.

The biological cycle of Neotephritis is highly synchronized with the flowering season of its host plants. Overwintering typically occurs in the pupal stage, either buried in the soil or within the dried remains of flower heads. Adult flies emerge in spring or early summer to mate and begin the cycle again, with some species capable of completing multiple generations within a single growing season.

Signs of infestation include distorted, stunted, or blackened flower buds. Infested flowers may fail to open fully, or the petals may show abnormal browning. Because the larvae damage the internal tissues, they often introduce pathogens that cause secondary rotting, which significantly reduces the aesthetic and commercial value of ornamental flora.

Effective pest management involves a multi-faceted approach:

• Sanitation by removing and burning infested flower heads before larvae drop to the soil.
• Soil cultivation around host plants to disturb and destroy pupae in the ground.
• Use of sticky yellow traps to monitor flight activity and time the application of insecticides.
• Application of selective systemic insecticides during the peak of adult fly emergence.