Acalolepta sejuncta

Systematic position: Acalolepta sejuncta is a member of the order Coleoptera, belonging to the longhorn beetle family (Cerambycidae). These beetles are known as wood-boring pests that spend the majority of their life cycle within the woody tissues of host plants, causing internal structural damage.

Affected crops: This pest primarily targets a variety of broad-leaved tree species. It is particularly known for attacking cacao plants and various fruit-bearing trees. The infestation often focuses on trees that are already stressed due to drought, nutritional deficiencies, or environmental damage.

Biology and life cycle: The life cycle includes the stages of egg, larva, pupa, and adult. Adult females lay eggs into the bark of the host tree. Upon hatching, the larvae bore into the sapwood and heartwood. The larval stage is the most prolonged, characterized by intensive feeding on the plant's vascular tissues before pupation occurs inside the wood gallery.

Damage and pest significance: The primary harm is caused by the larval feeding tunnels, which disrupt the flow of water and nutrients within the tree. This often results in leaf chlorosis, branch dieback, and significant loss of timber quality. In severe cases, the structural integrity of the tree is compromised, leading to death.

Protection measures: Integrated pest management is crucial to minimize losses. Key strategies include:

• Sanitary pruning and removal of infested timber to destroy larvae.
• Maintaining tree vigor through proper fertilization and irrigation.
• Monitoring for adult emergence during the flight season.
• Selective use of systemic insecticides to target adults before egg-laying starts.