Pest categorisation of Matsucoccus matsumurae

Area of Science:

• Plant Health
• Entomology
• Pest Risk Assessment

Background:

• Matsucoccus matsumurae, the Massonian pine bast scale, was identified as a pest of concern during a risk assessment of ornamental plants from China.
• The pest's taxonomic status is uncertain, particularly its relationship with the widespread European species Matsucoccus pini.
• M. matsumurae is known to infest Pinus species in China, including those also present in the EU as ornamental trees.

Purpose of the Study:

• To perform a pest categorization of Matsucoccus matsumurae for the EU territory.
• To assess the potential risks posed by M. matsumurae to the EU plant health sector.
• To determine if M. matsumurae meets the criteria for a potential Union quarantine pest.

Main Methods:

• Pest categorization based on available scientific literature and data.
• Assessment of pest biology, host range, and potential entry pathways into the EU.
• Evaluation of climate suitability and potential impact within the EU.

Main Results:

• M. matsumurae occurs in China and infests various Pinus species, some of which are present in the EU.
• Potential entry pathways exist via imported plants and plant products, though currently regulated.
• Favorable climatic conditions for M. matsumurae establishment are present in parts of the EU.
• Symptoms of infestation include needle yellowing, early needle drop, shoot desiccation, and bark necrosis, potentially leading to host mortality.

Conclusions:

• Matsucoccus matsumurae satisfies criteria for a potential Union quarantine pest, contingent on its distinctness from M. pini.
• Uncertainty regarding taxonomic status and potential host range expansion requires further investigation.
• The pest could pose a significant risk to EU Pinus populations if established.