Deudorix antalus

Systematic position. Deudorix antalus belongs to the order Lepidoptera and the family Lycaenidae. Known commonly as the bean butterfly or similar names in various regions, it is a significant agricultural pest that targets the reproductive structures of numerous plant species.

Crops and economic importance. This species poses a major threat to a wide range of crops, including beans, peas, pigeon peas, soy, as well as fruits like pomegranates, coffee, and citrus. High levels of infestation can result in total crop failure or severe yield reduction in affected plantations.

Biology and life cycle. The life cycle follows a complete metamorphosis: egg, larva, pupa, and adult. Females typically deposit eggs on buds or developing pods. Once hatched, the larvae immediately bore into the plant tissue, where they remain protected from external environmental factors and many conventional insecticides.

Damage symptoms. Larvae consume the seeds and internal parts of the pods, leading to stunted pod development and premature fruit drop. In addition to direct damage, the entry points created by larvae serve as pathways for secondary infections, such as bacterial or fungal rot, further compromising the harvest.

Management strategies. Controlling Deudorix antalus requires a proactive approach due to the internal feeding habit of the larvae:

• Monitoring adult flight activity using pheromone traps to time interventions correctly.
• Application of systemic insecticides specifically during the egg-laying phase and before larvae enter the pods.
• Implementing integrated pest management (IPM) practices, including biological control using egg parasitoids.
• Good agricultural practices, such as clearing crop residues to remove potential pupation sites.