Tchitcherin buprestid beetle

Taxonomic classification: Agrilus tchitcherini belongs to the order Coleoptera and the family Buprestidae, commonly known as jewel beetles or metallic wood-boring beetles. It is a specialized pest that has evolved to occupy specific ecological niches within woodland environments, primarily targeting weakened deciduous tree species.

Host plants: The primary hosts for this beetle are trees of the genus Betula (birch). Infestations typically occur in stands that have been weakened by drought, disease, or competition, as the beetle thrives on stressed host material to complete its larval development.

Biology and life cycle: The life cycle is typically univoltine, meaning one generation per year. Adult beetles emerge during the warm summer months, feed on foliage, and mate. Females lay eggs in bark crevices, and upon hatching, the larvae bore into the inner bark and cambium layer, where they create intricate tunnels while feeding throughout the growth season.

Damage and economic impact: The larval feeding activity is the most destructive phase, as it disrupts the vascular system, preventing the tree from transporting water and nutrients.

• Signs of infestation include thinning foliage.
• D-shaped exit holes on the bark.
• Branch dieback and tree decline.
• Presence of frass-filled galleries under the bark.

Control measures: Integrated Pest Management (IPM) is essential for controlling this beetle. Key strategies include the removal and destruction of infested wood to reduce local populations, maintaining tree vigor through irrigation and proper fertilization, and potentially using insecticide treatments on valuable specimens during the adult flight period to prevent egg-laying.