Two-spotted click beetle

Systematic position: Lacon binodulus belongs to the order Coleoptera and the family Elateridae, commonly known as click beetles. As a member of this family, the species is notorious for its larvae, which are widely recognized in agricultural practice as wireworms that inhabit soil layers.

Affected crops and damage: The pest attacks a wide range of agricultural crops, including cereals, root crops, and vegetables. Wireworms feed on germinating seeds, roots, and underground stems, leading to severe stand reduction and stunted plant growth. Significant infestations can lead to total loss of seedlings in high-pressure areas.

Biology and life cycle: The life cycle of Lacon binodulus includes egg, larval, pupal, and adult stages. The larval stage is the longest and most destructive, lasting several years within the soil profile. This extended duration makes the pest a persistent threat, as populations accumulate over time and are protected from many environmental stressors.

Nature of injury: The larvae damage plants by creating deep tunnels and severing the root systems. This mechanical destruction disrupts the plant's ability to absorb water and nutrients. Furthermore, the feeding sites often become infection points for soil-borne pathogens, leading to secondary rot and additional yield suppression.

Control measures: Effective management requires an integrated approach to minimize the impact of the pest:

• Implementing crop rotation to disrupt the larvae's feeding cycle.
• Performing deep autumn plowing to bring larvae to the surface for natural predator control.
• Using insecticidal seed treatments to protect young plants during the emergence phase.
• Monitoring soil populations and applying targeted soil insecticides where thresholds are exceeded.