Damage

• Fruit trees (Citrus) The hatched larvae of this pest create winding tunnels by burrowing into new leaves, and the damage becomes visible from May to June. While initial infestations occur during the spring flush, they are usually minor, but the pest causes significant damage during the summer and autumn flushes. Established trees are less affected, but young saplings suffer more damage. Infestation by this pest can also lead to the spread of canker disease, and severe infestations can cause defoliation.

Ecology This pest appears around 5 to 6 times a year, primarily overwintering in the adult stage. The incubation period for eggs is around 8 days in spring and autumn, and 6 days during the summer. The hatched larvae tunnel beneath the epidermis, forming winding tracks as they feed on the mesophyll tissues. Infested leaves exhibit withering and stunted growth.

Control Measures As the pest emerges alongside the spring flush, regular control measures should be implemented during the spring and summer occurrences.