Velvet longhorn beetle

The Callichroma velutinum, commonly referred to as the velvet longhorn beetle, is a species within the Cerambycidae family. These insects are well-known in entomology for their role as wood-boring pests, capable of affecting the structural integrity and health of various tree species throughout their habitat.

The pest primarily targets a range of deciduous host trees. In agricultural and horticultural settings, they can pose a threat to fruit orchards and ornamental plantations, as the larvae feed on the vital tissues located beneath the bark, often going unnoticed until significant damage has occurred.

The lifecycle follows a complete metamorphosis: egg, larva, pupa, and adult. The females typically deposit eggs into bark crevices. Once hatched, the larvae bore into the tree, creating intricate galleries that serve as their feeding grounds for an extended period, which is the most destructive phase of their life cycle.

Damage symptoms include wilting foliage, premature leaf drop, and dieback of branches. If the infestation is severe, the structural damage caused by larval tunneling can lead to the complete death of the tree. The presence of frass (sawdust-like material) at the base of the trunk or near exit holes is a key indicator of activity.

Effective management requires a multi-faceted approach. Key strategies include:

• Sanitation through the removal and destruction of infested wood.
• Application of systemic insecticides during the peak adult flight period.
• Regular monitoring of tree health to detect early stages of colonization.
• Silvicultural practices that promote tree vigor, making them less attractive to ovipositing females.