Strawberry aphid

The strawberry aphid (Chaetosiphon thomasi) is a small insect belonging to the family Aphididae within the order Hemiptera. It is recognized as a significant pest in berry production, specifically adapted to feed on plants within the Fragaria genus.

The primary hosts of this aphid are cultivated strawberries. The insects typically form dense colonies on the undersides of leaves, along the petioles, and in the crown area of the plants, feeding on phloem sap and depleting the plant's nutritional resources.

The biological cycle of this species is complex and includes several generations per season. They overwinter as eggs, typically located at the base of the strawberry petioles. As temperatures rise in spring, the eggs hatch, and the population begins to multiply rapidly, with winged forms appearing later to disperse to nearby plants.

The damage caused by Chaetosiphon thomasi goes beyond physical leaf curling and stunted growth. Its status as a primary vector for various strawberry-infecting viruses, such as strawberry crinkle virus and strawberry mild yellow edge virus, makes it one of the most critical threats to nursery stock and fruit plantations.

Effective management requires a strategic approach:

• Planting only certified virus-free runners to start new beds.
• Monitoring fields regularly to identify early signs of infestation.
• Applying systemic insecticides during periods of high aphid pressure, adhering to safety guidelines.
• Maintaining healthy soil and plant vigor through proper nutrition to improve resilience.