Flat-headed woodborer

The flat-headed woodborer (genus Coraebus) is a member of the Coleoptera order and the Buprestidae family. These insects are significant pests of woody plants, characterized by larvae that bore into the bark and wood, often remaining hidden until severe damage has already occurred.

These pests primarily target fruit trees such as apple, pear, and stone fruits, as well as various ornamental species and hardwood trees like oak. Their presence can be devastating in orchards and nurseries, where they jeopardize the long-term health and productivity of the host plants.

The biological cycle follows a complete metamorphosis: egg, larva, pupa, and adult. Females deposit eggs in bark crevices, and upon hatching, the larvae burrow beneath the bark to feed on vascular tissues. Development often takes several years, depending on environmental factors and the specific host species.

The damage is caused primarily by larval feeding, which creates galleries that disrupt nutrient and water flow. Visible signs of an infestation include leaf wilting, branch dieback, thinning canopies, and the presence of exit holes in the bark. Such structural damage leaves trees susceptible to secondary pathogens.

Control measures require a multi-faceted strategy. Key practices include:

• regular pruning and removal of infested wood to reduce larval populations;
• maintenance of tree vigor through proper irrigation and fertilization;
• application of systemic insecticides timed with the adult emergence period;
• monitoring adult activity to time interventions precisely.