Guava Root Knot Nematode Quarantine Impacts Sweet Potato Producers

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Interior quarantine established in North Carolina immediately for the Guava Root Knot Nematode, Meloidogyne enterolobii.

Regulated articles include:

  1. The Guava Root Nematode
  2. Sweet potato seed or sweet potato plants with or without roots produced in the state
  3. Soil and equipment that poses a risk of moving the nematode outside the quarantine area
  4. Any article, product, or means of conveyance which poses a risk of moving the nematode outside the quarantine area
Photo of sweet potato with guava root knot nematode.

Photo of sweet potato with guava root knot nematode. Photo by NC State Extension

Conditions Governing Movement Across State Lines: All regulated articles (listed above) are prohibited from movement outside of North Carolina to other non-quarantined states unless the following conditions are met:

  1. All sweet potato seed must be certified free of Guava Root Knot Nematode, Meloidogyne enterolobii with a blue tag issued by North Carolina Crop Improvement Association or other approved certifying agency.
  2. All sweet potato plants must be certified by the N.C. Department of Agriculture & Consumer Services, Plant Industry Division as being free of soil and roots prior to movement from the quarantine area.
  3. Ornamental sweet potato cuttings and plants produced in soilless media will be grown under a state Compliance Agreement.

Conditions Governing Movement within North Carolina: All regulated articles (listed above) are prohibited from movement within the state of North Carolina unless the following conditions are met:

  1. Commercial sweet potato plants for production must be produced and sold under compliance of the NCDA&CS, Plant Industry Division and be certified apparently free of soil and roots prior to distribution.
  2. Sweet potato seed must be produced and sold under compliance of the NCDA&CS, Plant Industry Division and be certified apparently free of Guava Root Knot Nematode, Meloidogyne enterolobii prior to distribution.
  3. Beginning September 1, 2020: all sweet potato seed produced and distributed within North Carolina must be produced and sold under compliance of the NCDA&CS, Plant Industry and be accompanied by a blue tag issued by North Carolina Crop Improvement Association or other approved certifying agency.
  4. All sweet potato packers, shippers and brokers must be under compliance of the NCDA&CS, Plant Industry Division.

Reduce the spread of this nematode and protect your land through cleaning equipment between fields and not entering a clean field after tending an infected field. Use a clean seed or transplant source, certified seed when possible. Remember, clean and/or fumigated soil does not protect an infected plant source from the nematode.

For concerns about Guava Root Knot Nematodes on your land contact the NCDA&CS Nematode Lab.