Pest description and crop damage Brown, jointed, wiry, yellow to brown larvae of click beetles that feed on roots and underground stems of mint plants. Adults are brown elongate beetles from 0.33 to 0.75 inch long. Wireworms are a problem mainly when mint is planted into soil that is already infested. They do not become a problem in well managed and watered established mint.
- 1,3-dichloropropene (Telone II, C-17, or C-35) at 20 GPA. Evenly broadcast by soil injection to a depth of 14 inches. For preplant fumigation to be successful, soils need to be warm and moist.
Note: When ethoprop (MOCAP) is used pre-plant at rates to control garden symphylan or nematodes, wireworms are often suppressed.