Wireworms are the larvae of click beetles (family Elateridae), named for the distinctive clicking sound adults make when righting themselves after being flipped on their backs — a mechanism powered by a spine-and-notch structure on the thorax. While adult click beetles are harmless and often attractively patterned, the larvae — wireworms — are serious agricultural and garden pests. Wireworms are slender, hard, shiny, yellowish to reddish-brown larvae that can reach 1–1.5 inches in length. They live in the soil for two to six years, feeding on seeds, germinating seedlings, roots, underground stems, and tubers. In Arizona, wireworms are most damaging in agricultural fields, vegetable gardens, and newly cultivated land — particularly in areas previously under grass or sod, where wireworm populations build up. They are especially destructive to corn, potatoes, carrots, beets, onions, and other root vegetables. Wireworm damage appears as poor germination, wilting seedlings, or tunneled roots and tubers. Because wireworms live deep in the soil and are difficult to detect, damage is often attributed to other causes before wireworms are identified. In Arizona's irrigated agricultural areas, wireworms can cause significant crop losses.
👁Warning Signs
Poor seed germination or seedling emergence. Wilting or dead seedlings with tunneled stems at soil level. Tunneled roots, tubers, or bulbs (potatoes, carrots, onions). Slender, hard, shiny yellowish-brown larvae found in soil. Damage worst in fields previously under grass or sod.
⚠Health & Property Risks
Significant crop losses in vegetable gardens and agricultural fields. Damage to seeds, seedlings, roots, and tubers. Multi-year larval period means populations persist for years.
Prevention Tips
Avoid planting vegetables in recently tilled sod or grass areas. Deep tillage before planting exposes wireworms to predators and desiccation. Crop rotation. Soil insecticide seed treatments for agricultural crops.
🛡Professional Treatment
Soil insecticides (chlorpyrifos, bifenthrin) incorporated before planting. Biological controls: beneficial nematodes (Steinernema carpocapsae). Bait traps (potato pieces buried in soil) to monitor populations. Delayed planting after tillage to reduce populations.
Frequently Asked Questions — Wireworm / Click Beetle
The Wireworm / Click Beetle (Elateridae family) is adults variable, often brown or black with patterns; larvae hard, shiny, yellowish to reddish-brown and typically measures Adults 1/4–3/4 inch; larvae (wireworms) 1/2–1.5 inches. Wireworms are the larvae of click beetles (family Elateridae), named for the distinctive clicking sound adults make when righting themselves after being flipped on their backs — a mechanism powered by.
The Wireworm / Click Beetle poses a moderate risk. Significant crop losses in vegetable gardens and agricultural fields. Damage to seeds, seedlings, roots, and tubers. Multi-year larval period means populations persist for years.
In Arizona, wireworm / click beetles are most often encountered in the following situations: Poor seed germination or seedling emergence. Wilting or dead seedlings with tunneled stems at soil level. Tunneled roots, tubers, or bulbs (potatoes, carrots, onions). Slender, hard, shiny yellowish-brown larvae found in soil. Damage worst in fields previously under grass or sod.
The Wireworm / Click Beetle is most active during: Year-round in soil; most damaging in spring when seeds germinate and soil warms. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.
Avoid planting vegetables in recently tilled sod or grass areas. Deep tillage before planting exposes wireworms to predators and desiccation. Crop rotation. Soil insecticide seed treatments for agricultural crops.
Soil insecticides (chlorpyrifos, bifenthrin) incorporated before planting. Biological controls: beneficial nematodes (Steinernema carpocapsae). Bait traps (potato pieces buried in soil) to monitor populations. Delayed planting after tillage to reduce populations.
Left unchecked, Wireworm / Click Beetle infestations can cause significant structural or food-storage damage over time. Significant crop losses in vegetable gardens and agricultural fields. Damage to seeds, seedlings, roots, and tubers. Multi-year larval period means populations persist for years. Early detection and professional treatment are the most cost-effective approach — contact Pest Control Bros for an inspection at the first sign of activity.
Dealing with Wireworm / Click Beetle?
Pest Control Bros LLC serves Maricopa, Chandler, Casa Grande, Tempe, Gilbert, and Mesa. No contracts. Free inspections. Same-week service.
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