Cerambyx multiplicatus

Systematic position. Cerambyx multiplicatus belongs to the order Coleoptera and the family Cerambycidae, commonly known as longhorn beetles. These insects are significant wood-boring pests that play a critical role in forest ecosystems, though they can cause severe damage when their population density increases in economically valuable plantations or sensitive tree stands.

Host plants and damage. This pest primarily attacks various deciduous trees, with a preference for oaks and other hardwoods. The damage is primarily caused by the larvae, which bore deep galleries into the cambium and xylem. This activity disrupts the transport of water and nutrients, leading to crown dieback, structural weakness of the tree, and ultimately mortality if the infestation is severe.

Biology and life cycle. The development cycle of Cerambyx multiplicatus spans several years. Adults emerge during the warmer months, feeding on tree sap before mating. Females deposit eggs in bark crevices. Upon hatching, the larvae immediately begin tunneling into the wood, where they spend most of their life cycle feeding, eventually undergoing pupation within a specialized chamber constructed inside the tree trunk.

Nature of damage. Infested trees typically show visible signs such as piles of frass (wood dust) at the base of the trunk and exit holes in the bark. Internally, the network of larval tunnels compromises the structural integrity of the timber, significantly reducing its commercial value and predisposing the tree to secondary attacks by fungi or other wood-degrading organisms.

Protection measures. Effective management strategies center on sanitation practices, such as the early detection and prompt removal of infested trees before the next generation of beetles emerges. Monitoring the health of stands is essential.

• Regular visual inspections for frass and exit holes.
• Prompt removal and processing of infested timber.
• Encouragement of natural predators like woodpeckers.
• Maintaining optimal stand density to reduce tree stress.