EPPO Platform
on PRAs

Express-PRA for Curculio sp. (North America)


The genus of the acorn weevil or hazelnut borer Curculio sp. with app. 350 species is distributed almost worldwide. This risk analysis relates to North American species on oaks (Quercus sp.). So far, the genus is neither listed in the Annexes of Directive 2000/29/EG nor by EPPO. 

The species considered here develops in acorns (seeds of the genus Quercus sp.) and reduces their germinability significantly. 

Due to suitable climatic conditions, it is assumed that the North American acorn weevil is able to establish widely outdoors in Germany. Dependant on the present species, an establishment in the Northern or Southern EU Member States is also possible. 

Because of low eradication possibilities in the event of an occurrence, as well as due to the high damage potential for acorns and thus, for the commercial and natural reproduction of oaks, Curculio sp. presents a considerable phytosanitary risk for Germany and other EU-Member States. 

Due to this risk analysis, it is assumed that Curculio sp. is able to establish in Germany or another Member State and to cause considerable damage. Thus, protective measures against the introduction of this potential quarantine pest should be met according to § 4a of the Plant Inspection Order. The intercepted consignment must be destroyed or be rejected.


  • Curculio


  • Quercus


Type File Size
Pest Risk Analysis Download 264,72kB

PRA Area

  • Germany