Plant-parasitic nematodes can cause serious damage to corn. There are numerous species that occur in Iowa, including the dagger, lance, lesion, needle, stubby-root, and stunt nematodes. Symptoms of nematode damage on corn include stunting and/or yellowing of foliage and stunting, swelling, and/or browning of roots. In the past few weeks, the Iowa State University Plant Disease Clinic has received samples from fields in southeastern Iowa with corn damaged by the needle nematode.
Iowa State University
Tylka, Gregory L., "Nematodes damage corn" (2005). Integrated Crop Management News. 1437.
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