Solier's buprestid beetle

Systematic position: Solier's buprestid beetle (Agrilus solieri) belongs to the order Coleoptera and the family Buprestidae. It is a wood-boring insect recognized as a significant pest of coniferous trees in Mediterranean climates.

Host plants: The beetle primarily targets pine species, particularly the Aleppo pine and Scots pine. The insects demonstrate a preference for trees that are under stress due to drought, pollution, or poor environmental management, making forest health a critical factor in control.

Biology and life cycle: The life cycle typically spans one to two years depending on local temperature conditions. Adult beetles emerge in spring, feed on needles, and subsequently lay eggs in the crevices of the tree bark. Upon hatching, larvae burrow deep into the bark and cambium layer to feed throughout the larval stage.

Nature of damage and economic importance: The larvae cause structural damage to the tree's vascular system by creating winding galleries that disrupt nutrient transport. As the infestation progresses, the foliage becomes discolored, the crown begins to thin, and eventually, the tree experiences branch dieback or total mortality, which can have devastating effects on timber production.

Protection measures: Integrated Pest Management (IPM) is essential for controlling this beetle. Key strategies include:

• Implementing regular sanitary cuts to remove infested wood.
• Monitoring beetle flights using pheromone or visual traps.
• Applying contact or systemic insecticides during the peak activity period of adult beetles.
• Enhancing tree vigor through proper irrigation and soil nutrition to build resistance.