Lesser click beetle

Systematic position. The lesser click beetle (Ectinus minimus) belongs to the order Coleoptera, family Elateridae. This species is widely recognized in agriculture for its larvae, commonly known as wireworms, which reside in the soil and pose a constant threat to various crop productions.

Host crops. Ectinus minimus is a polyphagous pest that affects a diverse range of crops. It causes significant economic damage to cereal crops such as wheat and barley, industrial crops like maize and sunflowers, as well as root vegetables including potatoes, onions, and various pulses.

Biology and life cycle. The life cycle involves complete metamorphosis occurring largely within the soil environment. Adult beetles emerge in spring to feed on foliage and lay eggs in moist, vegetated soil. The larvae, which are highly resilient, develop in the soil over several years, feeding on roots and underground stems before eventually pupating.

Nature of damage and economic impact. The primary injury is caused by wireworms feeding on germinating seeds and root systems. This leads to reduced plant density, stunted growth, and crop failure. Additionally, mechanical damage to tubers and taproots creates entry points for fungal and bacterial infections, significantly reducing the marketability of the harvest.

• Implement proper crop rotation schemes to disrupt the pest life cycle.
• Perform deep autumn tillage to expose larvae to birds and harsh weather.
• Utilize insecticide seed treatments for prophylactic protection.
• Apply soil-applied granular insecticides during the sowing process.
• Maintain clean field borders and control weeds to minimize adult beetle habitat.