Psacothea

Systematic position
Psacothea (Psacothea hilaris) belongs to the order Coleoptera and is a member of the longhorn beetle family (Cerambycidae). This species is a significant xylophagous pest that causes substantial damage to forest stands and fruit orchards within its native distribution range in East Asia.

Host plants
The primary host of this pest is the common fig (Ficus carica). However, during periods of high population density, Psacothea can infest various other broad-leaved trees, including species of the Moraceae family and certain fruit-bearing trees, posing a considerable risk to agricultural and horticultural areas.

Biology and life cycle
The life cycle of the insect consists of egg, larva, pupa, and adult stages. Adult beetles are active during the summer months, feeding on the bark of young shoots. Females deposit eggs into crevices in the bark of trunks or large branches. Upon hatching, larvae tunnel deep into the wood, where they spend the majority of their development feeding on internal tissues.

Damage patterns and economic impact
The primary damage is caused by the larvae, which bore extensive galleries throughout the wood. This activity disrupts the transport of nutrients and water, causing tree weakening and eventual dieback. Common symptoms of infestation include exit holes on the bark, sawdust-like frass at the base of the trunk, and chlorosis or premature leaf drop on affected branches.

Management strategies
Managing this pest is challenging due to the cryptic nature of the larvae living inside the tree. Effective control measures include:

• Regular monitoring of trees for entry points and frass.
• Manual removal of larvae by inserting wire into the galleries.
• Application of systemic insecticides during the peak activity of adults.
• Sanitation pruning and destruction of heavily infested limbs or entire trees to curb the spread of the beetle.