Dorysthenes forficatus

Systematic position: Dorysthenes forficatus belongs to the order Coleoptera and is classified within the family Cerambycidae, commonly known as longhorn beetles. It is a member of the subfamily Prioninae, characterized by robust morphology and larvae that strictly develop within the wood of host trees.

Host plants: This pest primarily affects broad-leaved trees. It is frequently observed in forest ecosystems, attacking species such as oak and chestnut, and can also invade fruit-bearing orchards, causing significant economic losses to timber production and agricultural output.

Biology and lifecycle: The development of the beetle occurs entirely within the woody tissues of the host. Adults typically emerge in the warmer months to mate and oviposit on the bark. Upon hatching, the larvae tunnel into the xylem, where they remain for several years, consuming wood and growing until they reach the pupal stage.

Damage and harmfulness: The primary harm is caused by the larval stage, which creates extensive galleries inside the trunks and root systems. These tunnels sever the vascular pathways of the tree, resulting in decreased vitality, canopy dieback, and eventually the death of the tree. The infestation is often hidden until severe structural damage has already occurred.

• Regular monitoring of tree health using pheromone-based traps.
• Immediate removal and destruction of infested timber to limit the spread.
• Trunk injections with systemic insecticides in high-value orchards.
• Promoting silvicultural practices that maintain tree health and resilience against wood-boring insects.