A recurring question often asked concerning plant-parasitic nematodes that feed on corn is, “When should samples be collected to check for these pests?” The answer depends on the details of each specific field situation. In most cases, fall sampling to test for nematodes that feed on corn is not recommended.
Iowa State University
Tylka, Gregory L., "When to Sample for Nematodes on Corn - It Depends" (2010). Integrated Crop Management News. 352.
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