Across the corn belt depending on time of year | Effective on wireworms. Single application gives multiyear suppression. However realize that wireworm has a multiyear in soil lifecycle depending on the species which range from 2-7 years. Under heavy wireworm pressure, it takes a couple of years for the nematodes to reduce the population significantly.
Data shows that the biocontrol nematodes are most effective on the smaller stages so they wipe out the smaller stages and the larger stages mature out to adults. Going forward a couple of years, the presence of the biocontrol nematodes continues to attack the smaller stages, preventing them from reaching the larger more damaging sizes.
Wireworms are the #2 pest in organic agriculture due to the widespread use of grass based cover crops. We sell a significant amount of biocontrol nematodes to organic ag for wireworm management.
There is also some published work out of Montana State Univ supporting the efficacy of biocontrol nermatodes on wireworm.
We have a mint customer in the Portland area who will be applying biocontrol nematodes against root weevils in late August-early September so we will be passing by relatively close.
Edited by Nematotode-guy 3/1/2026 12:30
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Biological Control of Rootworm - A link to a recent presentation
