Ovalisia jewel beetle

The Ovalisia is a genus of beetles belonging to the Buprestidae family, commonly known as jewel beetles or metallic wood-boring beetles. These insects are significant pests that primarily infest the woody parts of broad-leaved trees, targeting both forest species and cultivated orchard varieties.

Systematically, this genus is classified within the order Coleoptera. Their life cycle typically involves a period where larvae live underneath the bark, feeding on the cambium and xylem. These larvae are highly specialized to thrive in wood, often favoring stressed, drought-stricken, or wounded trees.

The biology of Ovalisia involves adults emerging during the warm season to mate and lay eggs in bark crevices. Once the eggs hatch, the larvae begin their development, creating extensive, winding galleries under the bark. This mining activity disrupts the tree's vascular system, preventing water and nutrient flow.

Symptoms of infestation include thinning foliage, premature leaf drop, and the presence of D-shaped exit holes on the bark surface. As the larvae consume the internal tissues, the structural integrity of the branch or trunk is compromised, leading to dieback or total death of the host tree.

Integrated pest management (IPM) is essential for controlling Ovalisia. Recommended practices include:

• Regular pruning of dead or infested branches.
• Maintaining tree vigor through proper irrigation and fertilization.
• Removing and destroying infested wood to prevent adult emergence.
• Applying targeted insecticides to trunks during the adult flight period.