Yellow-spotted longhorn beetle

The yellow-spotted longhorn beetle (Psacothea hilaris) is a significant wood-boring insect belonging to the Cerambycidae family within the order Coleoptera. Originally native to East Asia, this beetle has become a major concern for agricultural sectors, particularly in regions where fig cultivation is economically important.

The beetle primarily targets fig trees (Ficus carica), causing substantial damage to orchards. Beyond fig trees, the insect is known to infest various other tree species, including mulberry and pomegranate, making it a versatile pest that can potentially devastate diverse fruit-growing environments if left unchecked.

The life cycle of Psacothea hilaris typically spans one year under standard conditions. Adult beetles emerge during the summer months, feeding on the bark and twigs before mating. Females deposit their eggs into the bark of trunks or branches. Once the larvae hatch, they bore into the inner bark and heartwood, creating extensive galleries that compromise the structural integrity of the plant.

The damage caused by these beetles is often severe. By tunneling through the xylem and phloem, larvae disrupt the tree's ability to transport water and nutrients. This physiological stress leads to yellowing leaves, branch dieback, and eventual tree mortality. Furthermore, the boreholes serve as entry points for secondary pathogens and wood-rotting fungi.

Effective management requires an integrated pest management (IPM) strategy. Key tactics include the physical removal and destruction of infested wood to limit the population, combined with the application of targeted insecticides during the adult emergence phase. Ongoing monitoring through visual inspections and pheromone traps is essential for early detection and mitigation of potential outbreaks.

• Regular inspection of bark for larval entry holes.
• Mechanical extraction or removal of heavily infested limbs.
• Application of systemic insecticides during peak beetle activity.
• Destruction of infected wood debris to prevent new infestations.