Root-knot nematode in sweetpotato

In many areas of the world, the root-knot nematode (RKN), Meloidogyne incognita, causes significant yield reductions in sweetpotato. This nematode also infests many other cultivated and noncultivated plants. Research has shown many sources of resistance among germplasm accessions, particularly those from China, Peru, and Japan. Therefore, management of this pest is based on the use of resistant cultivars.