Eggplant fruit and shoot borer

The eggplant fruit and shoot borer (Leucinodes orbonalis) is a devastating pest belonging to the family Crambidae, order Lepidoptera. It is recognized as the most significant limiting factor in eggplant production worldwide, particularly in warm-climate regions.

While primarily targeting eggplants, the pest is polyphagous and can infest other solanaceous crops including tomatoes, potatoes, and peppers. Its ability to infest various parts of the host plant throughout the growing season contributes to its persistence in agricultural fields.

The life cycle consists of egg, larval, pupal, and adult stages. Females lay eggs on the undersides of leaves or on floral buds. Upon hatching, larvae immediately bore into tender shoots or fruits. This internal feeding habit makes them notoriously difficult to control with contact-based pesticides.

The damage is twofold: larval feeding in the shoots causes terminal wilting and stunted growth, while damage to the fruit results in boreholes, internal tunneling, and secondary decay. Marketable yield can be reduced to near zero in severe, uncontrolled infestations.

Integrated Pest Management (IPM) is essential for effective control:

• Removing and destroying infested plant parts promptly to reduce population reservoirs.
• Implementing crop rotation to break the pest's life cycle.
• Deploying sex pheromone traps for population monitoring and mating disruption.
• Applying biological controls like Bacillus thuringiensis or parasitic wasps.
• Selective use of systemic insecticides during the peak oviposition period.