Dorsal click beetle

The dorsal click beetle (Drasterius dorsalis) is a member of the Elateridae family, belonging to the order Coleoptera. As a significant agricultural pest, its larvae—collectively known as wireworms—pose a serious threat to crop establishment. These soil-dwelling pests are well-adapted to various agricultural environments, making them a consistent challenge for agronomists and farmers during the early vegetative stages of crop development.

This species is highly polyphagous, meaning it infests a wide range of crops. Major agricultural targets include cereals like wheat and maize, as well as sunflowers, sugar beets, and various vegetable crops. The presence of wireworms in a field is often determined through soil sampling, which is crucial for assessing potential damage risks before sowing any susceptible cultivars.

The biology of Drasterius dorsalis involves a complex life cycle. The larval stage is the most damaging, living underground and feeding on seeds, roots, and stems. The duration of this stage can last for several years, depending on environmental factors like soil temperature and moisture. Adults are mobile and capable of flight, which aids their distribution across fields during the warmer months of the year.

Damage caused by this pest is often subtle but devastating. By boring into the seeds or feeding on the roots, the larvae cause poor germination, plant stunting, and significant thinning of plant stands. In cases of high infestation, the total loss of seedlings can occur, leading to economic losses due to the necessity of reseeding or significantly reduced yields at harvest time.

Integrated Pest Management (IPM) is the most effective approach to control this pest. Farmers are encouraged to employ diverse crop rotation strategies, including the use of crops that are less favorable for wireworm development. Mechanical soil cultivation can help expose larvae to predators and desiccation. Furthermore, the application of chemical seed treatments or soil-applied insecticides remains a primary tool for protecting high-value crops during their most vulnerable stage.