Potato tuber damage from northern root-knot nematode (Meloidogyne hapla)

Northern Root-Knot Nematode Impact on Potato

Northern Root-Knot Nematode (Meloidogyne hapla; NRKN) grower information: 

  • Compared to the Columbia root-knot nematode (CRKN; M. chitwoodi), NRKN has a higher temperature requirement for development, therefore fewer lifecycles are completed in a season. 
  • There are currently no resistant potato cultivars commercially available. 
  • Fumigants and nematicides are important for controlling this nematode. 

>500 hosts including potato 

potato damage from northern root knot nematode
The development of northern root-knot nematode (NRKN; Meloidogye hapla) females in roots who lay eggs results in ‘strikes’ just underneath the skin of a potato tuber.
NRKN juveniles in the soil invade the roots and tubers of potato
NRKN female and eggs in a potato tuber
In the Pacific Northwest, both Columbia root-knot and northern root-knot nematodes can be found.
Northern-Root-KnotDownload

Similar Posts