Rusty-shouldered click beetle

The rusty-shouldered click beetle (Ampedus collaris) is a beetle belonging to the order Coleoptera and the family Elateridae. This species is typically associated with decaying wood and forest habitats, playing a specific ecological role in the decomposition of dead timber within orchard or forest ecosystems.

The adult beetles are relatively small, characterized by a distinct reddish-orange patch on the pronotum, which contrasts with the dark elytra. While the adults feed primarily on pollen or nectar, the larvae, often referred to as wireworms, dwell within decaying wood, utilizing their strong mandibles to bore through woody substrates.

The pest potential of Ampedus collaris is generally considered minor, though it can become a problem in new plantations or forest nurseries. When the preferred substrate of decaying wood is scarce, larvae may occasionally feed on the roots or the bark of young tree saplings, leading to weakened growth or even the death of the plants.

The life cycle involves a metamorphosis that can span several years. The larval stage is the longest part of the cycle, requiring moist and organic-rich environments to develop fully. Pupation occurs within the wood, and adults emerge in the spring to complete the reproductive cycle before the next generation begins.

Management strategies for this pest are primarily preventive. Reducing the amount of dead, rotting wood in commercial orchards is the most effective way to limit their population density. In cases of significant infestation in saplings, proper soil cultivation and the removal of stumps are highly recommended to disrupt the development cycle of the larvae.