Pest categorisation of Elasmopalpus lignosellus

Area of Science:

• Plant Health
• Entomology
• Pest Risk Analysis

Background:

• Elasmopalpus lignosellus, a pest from the Americas, has been intercepted in the EU and added to the EPPO Alert List.
• This pest targets over 70 plant species, including important crops like maize, legumes, and brassicas, as well as ornamental and forest trees.

Purpose of the Study:

• To conduct a pest categorisation of Elasmopalpus lignosellus for the European Union (EU) territory.
• To assess the potential risks and establishment capabilities of E. lignosellus within the EU.

Main Methods:

• Review of existing scientific literature and interception data.
• Analysis of the pest's biology, host range, and geographical distribution.
• Assessment of potential entry pathways and factors influencing population development.

Main Results:

• Elasmopalpus lignosellus is established in tropical and subtropical regions of the Americas, with adults found in temperate zones.
• Larvae damage plants by feeding on roots and stems, causing stunting and yield loss, particularly in sandy soils during hot, dry conditions.
• Potential pathways for entry include plants for planting, rooted media, and fresh vegetables with stems.

Conclusions:

• Elasmopalpus lignosellus meets the criteria to be considered a potential Union quarantine pest.
• Impacts in the EU are likely limited to Mediterranean coastal areas with sandy soils during specific climatic conditions.
• Available phytosanitary measures can effectively inhibit the entry of this pest.