News report | 22-01-2026 | 10:19

The NVWA has instructed the inspection service KCB to conduct extra checks for symptoms of the root-knot nematode (Meloidogyne enterolobii) in sweet potatoes (Ipomoea batatas). During import inspections, several potatoes per shipment are peeled to detect possible symptoms. This follows a recent finding of M. enterolobii in sweet potatoes in Belgium.

Sampling procedure

If symptoms of M. enterolobii are found, the sampled batch is recorded and the sample is sent to NIVIP for testing for the presence of M. enterolobii. The detection test used provides results within 3 working days about the possible presence of M. enterolobii in the sample. If positive, an identification test follows, which takes about 2 working days.

The following test results are possible:

  • First test negative: the batch is released
  • First test positive and second test negative: the batch is released
  • First test positive and second test positive: measure return, destroy or export outside the EU

The costs for sampling and testing are charged to the applicant.

Background

M. enterolobii is a tropical root-knot nematode that invades plant roots causing (large) galls on the roots. This hinders water and nutrient uptake and also growth. The nematode is very harmful to tomato, pepper, and cucumber, but also affects potato tubers. Infected crops are not harmful to humans and animals. M. enterolobii has quarantine status and may not be introduced into the European Union (EU). Infections in the Netherlands must be eradicated.

See also the EPPO Global Database for an up-to-date overview of host plants and distribution of M. enterolobii.

More information

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