Pest categorisation of Longidorus diadecturus

Area of Science:

• Plant Pathology
• Nematology
• Entomology

Background:

• Longidorus diadecturus is a migratory ectoparasitic nematode.
• It vectors the nepovirus Peach rosette mosaic virus (PRMV).
• This pest is currently not present in the EU but is regulated under Council Directive 2000/29/EC.

Purpose of the Study:

• To perform a pest categorisation of Longidorus diadecturus for the EU.
• To assess its potential as a Union quarantine pest.

Main Methods:

• Review of existing data on the nematode's biology, distribution, and host range.
• Assessment of potential entry pathways and climatic suitability in the EU.
• Evaluation against EU plant health regulations and EFSA's criteria for quarantine pests.

Main Results:

• Longidorus diadecturus is a well-defined taxon originating from North America.
• Soil is a potential entry pathway, and EU climatic conditions are suitable.
• Hosts include peaches and grapes, which are cultivated in the EU.
• The nematode can cause direct damage and vector PRMV, posing a significant risk.

Conclusions:

• Longidorus diadecturus satisfies criteria for a potential Union quarantine pest.
• Effective measures can inhibit entry via soil, but unregulated plants for planting pose a risk.
• The pest's ability to vector PRMV and its suitability for EU conditions warrant strict regulatory attention.