Fig 1. Damage to peanuts caused by the peanut root-knot nematode.
Entomology and Plant Pathology, Oklahoma State University
127 Noble Research Center, Stillwater, OK74078
Vol. 11, No. 18
Apr 11, 2012
Root-knot nematode control in summer crops
John Damicone, Extension Plant Pathologist
Root-knot nematodes damage crops by feeding on the root system and producing deformed (galled) root systems, which stunt plants and reduce productivity (Fig. 1). With the recent loss of the registration for aldicarb (Temik), there are currently no preplant, non-fumigant nematicides available for control of nematodes in field crops. Seed treatments with abamectin (Avicta) and Bacillus firmus + clothianidin (Poncho/Votivo) are being developed, but are generally regarded as less effective than aldicarb. Cultural controls for nematode control include genetic resistance and crop rotation. I have received several questions regarding which crops are good rotational crops for reducing levels of root-knot nematode. My answer is “it depends on which root-knot species is the problem”.