Xiphydria prolongata

Xiphydria prolongata belongs to the order Hymenoptera and the family Xiphydriidae. This insect is a specialized wood-boring pest that leads a hidden lifestyle. Adult specimens are small wood wasps that usually do not cause direct damage to foliage, but their larvae are capable of significantly weakening the condition of trees.

The main targets of infestation are deciduous tree species, particularly willows (Salix) and poplars (Populus). The pest prefers weakened, dying, or freshly felled trees, but during mass outbreaks, it may colonize relatively healthy specimens, leading to premature tree mortality.

The biology of the species is characterized by larval development within the wood. Females lay eggs in bark crevices or mechanical wounds on the trunk. The hatched larvae bore deep tunnels into the wood, where they feed and develop over one or several seasons. Pupation also occurs inside the wood, after which the adult insects chew exit holes to emerge.

The damage is characterized by numerous tunnels that disrupt the transport of nutrients and compromise the structural integrity of the trunk. The harmful impact includes technical degradation of the wood, loss of commercial value, and general suppression of the plant's growth, making it susceptible to secondary fungal infections and other pests.

Control measures include a comprehensive approach:

• Sanitary logging and removal of infested or severely weakened trees.
• Timely disposal of logging residues to eliminate breeding sites.
• Maintaining high agronomic standards and overall plant vigor.
• Application of systemic insecticides during high pest pressure in nurseries or ornamental gardens.