How to Manage Pests

Pests in Gardens and Landscapes

Wireworms

Wireworm larvae are slender, cylindrical insects. They are usually yellowish and resemble mealworms. They have six short legs close together near the head. Adults are click beetles; they do not weaken older plants.

Life cycle

Damage

Wireworm larvae injure sprouting seeds and seedlings by feeding on roots or shoots. They also bore into stems and other plant structures such as potato tubers. Damage is most common where soil has a high organic content.

Solutions

Prior to planting, flooding an area can help reduce populations. Reduce levels of organic matter. Carrots are especially attractive to wireworms. Plant a nearly fully grown carrot in the soil every 2.5 to 3 feet throughout the garden. Every 2 to 3 days pull up the carrots, remove the wireworms, and replace the carrots in the soil to trap more wireworms.

Sugarbeet wireworm larvae
Sugarbeet wireworm larvae

Tunnel in potato tuber caused by wireworm
Tunnel in potato tuber caused by wireworm


Statewide IPM Program, Agriculture and Natural Resources, University of California
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Agriculture and Natural Resources, University of California

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