Mongolian longhorn beetle

Systematic position and description: The Mongolian longhorn beetle (Tetrops mongolicus) belongs to the order Coleoptera and the family Cerambycidae, commonly known as longhorn beetles. This species acts as a specialized pest that frequently inhabits temperate regions, primarily affecting deciduous tree species.

Host crops: This pest poses a significant threat to various fruit and forestry crops. In orchard environments, it most commonly attacks apple, pear, cherry, plum, and apricot trees. It can also be found on wild-growing rosaceous plants, which makes controlling its population in rural or forest-adjacent areas more complex.

Biology and life cycle: The life cycle of this beetle is intrinsically linked to the health and structural integrity of wood. Females deposit eggs into or under the bark of young shoots and branches. Upon hatching, the larvae bore deep into the woody tissues, creating galleries where they feed on cambium and wood. Pupation occurs within these galleries, and adult beetles typically emerge during the spring or early summer.

Damage patterns: The primary damage is caused by the larvae, which disrupt the sap flow within young shoots. This feeding activity results in leaf wilting, drying out, and eventually the death of entire branches. Trees heavily infested with Tetrops mongolicus suffer significant productivity loss and become highly susceptible to secondary pathogens and further pest infestations.

• Implement regular sanitary pruning and destroy infested branches promptly.
• Apply insecticidal treatments to the tree canopy during the adult emergence phase.
• Maintain high agricultural standards to bolster the natural immunity of the trees.
• Monitor bark integrity in early spring to detect egg-laying sites before the larvae penetrate the wood.