Gold-necked jewel beetle

The gold-necked jewel beetle (Agrilus auricollis) is a member of the Buprestidae family within the order Coleoptera. It is recognized as a significant wood-boring pest that poses a serious threat to the health and structural integrity of various tree species, particularly in orchards and ornamental gardens.

The beetle primarily targets stone fruit and various deciduous trees. While it frequently infests stressed or weakened trees, high population densities can lead to the colonization of healthy specimens, which makes this insect a concern for both commercial fruit production and forestry management.

The biological cycle of this insect involves complete metamorphosis. Adult beetles typically emerge during the summer months to mate and oviposit on the bark of host trees. Upon hatching, the larvae bore into the inner bark and cambium layer, where they feed throughout their development, creating intricate gallery patterns that disrupt nutrient transport.

The damage caused by the gold-necked jewel beetle is often severe and cumulative. As larvae girdle the branches or stems while feeding, they cause canopy thinning, branch dieback, and general lack of vigor. The distinctive D-shaped exit holes left by emerging adults are a hallmark of this species, serving as a key diagnostic feature for detection in the field.

Integrated pest management (IPM) strategies for controlling this pest include several essential practices:

• Strict sanitation protocols, including the removal and destruction of infested wood;
• Maintaining optimal tree health through proper irrigation and nutrition;
• Application of systemic insecticides during peak adult activity periods;
• Deployment of pheromone-based monitoring tools;
• Careful inspection of nursery stock to prevent the spread of the beetle to new locations.