How to Manage Pests
UC Pest Management Guidelines
Wireworms injure seedlings by feeding on roots or boring into stems. Damage is more common in spring planted crops where the soil has a high organic content, such as fields that have recently been in or adjacent to alfalfa, pasture, or uncontrolled weeds. Wireworms do not significantly damage older plants.
Soil fumigants and certain other pesticides kill wireworms, but special controls are seldom needed. Flooding a field for several weeks also reduces populations.
UC IPM Pest Management Guidelines: Cole Crops