Melanotus depressus

Melanotus depressus belongs to the order Coleoptera and the family Elateridae. This insect is a typical soil-dwelling pest, whose larvae are commonly referred to as wireworms in agricultural sciences.

The pest is highly polyphagous, impacting a wide variety of agricultural crops. Fields of cereals, maize, sunflowers, sugar beets, potatoes, and various vegetables are particularly vulnerable, as larvae can destroy young seedlings and root systems completely.

The biology of the species is deeply linked to the soil environment. The life cycle is quite long, spanning several years, during which larvae progress through various instars, gradually increasing in size and moving to deeper soil layers for overwintering. Adult beetles usually emerge in spring, feeding on plant vegetation, but the larvae cause the primary economic damage.

Damage characteristics involve feeding on underground stem parts, consuming seeds during germination, and damaging root crops. This results in thinned crop stands, stunted growth, and a significant reduction in overall yield. Openings caused by larval feeding often facilitate secondary infections, worsening the overall phytosanitary status of the field.

The protection strategy combines agrotechnical and chemical approaches.

• Implementing crop rotation to break the pest's life cycle.
• Deep autumn tillage to mechanically disrupt and kill larvae.
• Application of insecticidal seed treatments.
• Utilization of soil insecticides where pest pressure is high.
• Monitoring adult population densities using pheromone traps.