Four-spotted buprestid

The four-spotted buprestid (Chrysobothris quadriimpressa) is a species of beetle belonging to the Buprestidae family, order Coleoptera. Known as metallic wood-boring beetles, these insects are significant pests that cause damage to a variety of deciduous trees, impacting both forestry and fruit-growing industries.

Host plants for this beetle primarily include fruit trees such as apple and pear, as well as several species of hardwoods. The pest is particularly attracted to trees that are already stressed by drought, poor soil conditions, or mechanical damage, though it can eventually impact healthy trees if the infestation density is high.

The life cycle of the beetle involves complete metamorphosis. Adults emerge during the warmer months to feed on leaves and mate. Females lay their eggs in bark crevices. The larvae bore into the cambium and xylem layers, creating winding galleries that disrupt the vascular system, effectively preventing the flow of nutrients throughout the tree.

The damage caused by the larvae is severe. Symptoms include dieback of branches, thinning of the canopy, and the presence of oval-shaped emergence holes on the bark. Over time, the structural integrity of the tree is compromised, leading to premature senescence, reduced fruit production, and eventually the death of the tree if left untreated.

Integrated pest management strategies include:

• Maintaining tree vigor through proper irrigation and fertilization.
• Prompt removal and destruction of infested branches to curb population growth.
• Applying contact or systemic insecticides during the peak adult flight period.
• Protecting tree trunks with whitewashing or physical barriers to prevent egg-laying.