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Cacopsylla ulmi

Cacopsylla ulmi

Description

Cacopsylla ulmi is a psyllid insect primarily associated with elm trees (Ulmus spp.). This species is widespread across Europe, including regions such as Britain and the Balkans. Adult individuals measure between 3.6 and 4.3 mm in length, with forewings approximately 3.5 mm long and 1.4 mm wide. The larvae feed on the sap of elm leaves, producing significant amounts of honeydew. While their feeding activity can lead to leaf deformation and withering, the intensity of infestation is usually not severe enough to cause substantial harm to the overall health or aesthetic appearance of mature elm trees.

Symptom

Infested elm leaves may exhibit withering and deformation due to larval feeding, often accompanied by the presence of sticky honeydew.

Tree Species: Elm

Part of a plant- attacked: Leaf / Needle

Pest significance: Less harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes