Pest categorisation of Diaprepes abbreviatus

Area of Science:

• Plant Health
• Entomology
• Pest Risk Assessment

Background:

• Diaprepes abbreviatus is a polyphagous pest native to the Caribbean, with established populations in the USA, Gran Canaria, and Madeira.
• It has a wide host range, affecting over 270 plant species across 60 families.
• The weevil's life cycle involves soil-dwelling larvae feeding on roots, and adults capable of long-distance dispersal on nursery stock.

Purpose of the Study:

• To conduct a pest categorisation of Diaprepes abbreviatus for the European Union.
• To assess the potential risks associated with the introduction and spread of D. abbreviatus into the EU.
• To evaluate D. abbreviatus as a potential Union quarantine pest.

Main Methods:

• Pest categorisation based on established criteria for Union quarantine pests.
• Review of D. abbreviatus biology, distribution, host range, and pathways of entry.
• Assessment of climate suitability and potential impact within the EU.

Main Results:

• Diaprepes abbreviatus is identified as a relevant non-regulated EU pest with the potential to enter and spread.
• Southern EU coastal areas and greenhouses are considered climatically suitable for establishment.
• Introduction of D. abbreviatus is likely to cause adverse impacts on plant health and ecosystems.

Conclusions:

• Diaprepes abbreviatus meets the criteria for consideration as a potential Union quarantine pest.
• Existing EU regulations and phytosanitary measures address some pathways, but risks remain.
• Preventative measures are crucial to mitigate the entry, spread, and impact of this invasive weevil.