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The peanut root-knot nematode, Meloidogyne arenaria, is most important root-knot nematode of peanut, which was reported in 1989 in Arkansas.
However, it has yet to be detected on peanut in the peanut production area of Arkansas.
The northern root-knot nematode, M. hapla, and lesion nematode, Pratylenchus brachyurus, have been reported in Arkansas and could be potential issues with continued peanut
production. The southern root-knot nematode, M. incognita, is the most common species in Arkansas. Peanut is a nonhost to the southern root-knot
nematode so it is an excellent crop to use in a rotation in sandy soil where there
is a history of southern root-knot nematode.
Figure 1. Root galls caused by Meloidogyne arenaria, peanut root-knot nematode, from a greenhouse inoculated trial.