Deudorix epijarbas

Systematic position: Deudorix epijarbas is a moth species belonging to the family Lycaenidae within the order Lepidoptera. It is well-documented as a primary pest in orchards across South and Southeast Asia. The insect is highly adapted to feeding on developing fruits, often causing major production losses in commercial pomegranate farming.

Host plants: The primary host is the pomegranate (Punica granatum). However, it is a polyphagous insect that can infest a variety of other crops, including litchi (Litchi chinensis) and certain species of citrus. Its ability to switch between hosts contributes to its persistence in diverse agricultural landscapes.

Biology and life cycle: The lifecycle consists of egg, larva, pupa, and adult stages. The female adult deposits eggs on the surface of developing fruits. Upon hatching, the larva bores into the fruit, creating an entry point. The larval stage is the most destructive phase, as the insect spends its entire feeding cycle protected inside the fruit before pupation.

Nature of damage and economic importance: Larvae feed internally on seeds and pulp, leading to stunted fruit growth and secondary rot caused by fungal infections. The presence of boreholes and frass makes the fruit unmarketable. Infestations often lead to mass fruit drop, resulting in significant yield reductions that can jeopardize the profitability of an orchard.

Control measures: Managing Deudorix epijarbas requires an integrated pest management (IPM) strategy:

• Regular sanitation: removing and destroying fallen or infested fruits to break the life cycle.
• Physical barriers: bagging individual fruits to prevent oviposition by female moths.
• Monitoring: using pheromone traps to time the application of selective insecticides.
• Biological control: encouraging the presence of natural egg parasitoids and predators in the orchard environment.