False wireworm

Definition

The larva of a darkling beetle (family Tenebrionidae), so named for its superficial resemblance to the larvae of click beetles (Elateridae), which are called true wireworms. False wireworms are elongate, cylindrical, hard-bodied, and yellowish to brownish, with a heavily sclerotized exoskeleton and short thoracic legs. Unlike true wireworms, they lack the ability to snap into a rigid 'click' for righting themselves. The larvae are soil-dwelling and may damage seeds, seedlings, and roots of crops, though they are generally less destructive than true wireworms.

Etymology

From 'false' (distinguishing from true wireworms) + 'wireworm' (descriptive of the larva's slender, wire-like form)

Example

In Australian wheat fields, larvae of the genus Mimopeus—false wireworms—can reduce crop establishment by feeding on germinating seeds and young roots, requiring monitoring distinct from true wireworm (Agriotes) management programs.

Synonyms

• tenebrionid larva
• darkling beetle larva

Related Terms

• Wireworm
• true wireworm
• click beetle
• darkling beetle
• Tenebrionidae
• Elateridae
• soil pest
• seedling pest

Usage Notes

The term is strictly vernacular and applied only to larvae; adults are called darkling beetles. Specialists distinguish false from true wireworms by family affiliation (Tenebrionidae vs. Elateridae), body flexibility, and sometimes by head capsule shape—false wireworms typically have a more rounded, less prognathous head. In agricultural contexts, the distinction matters for pest management: true wireworms are often more persistent and harder to control with seed treatments. Some regional usage may apply 'false wireworm' to specific genera (e.g., Eleodes in North America, Mimopeus in Australia).