Overview of the evaluation of Cryphonectria parasitica for bundles of whips and seedlings
Rating of the likelihood of pest freedom	Pest free with some exceptional cases (based on the Median).
Percentile of the distribution	5%	25%	Median	75%	95%
Proportion of pest‐free bundles	9,963 out of 10,000 bundles	9,981 out of 10,000 bundles	9,989 out of 10,000 bundles	9,995 out of 10,000 bundles	9,999 out of 10,000 bundles
Percentile of the distribution	5%	25%	Median	75%	95%
Proportion of infected bundles	1 out of 10,000 bundles	5 out of 10,000 bundles	11 out of 10,000 bundles	19 out of 10,000 bundles	37 out of 10,000 bundles
Summary of the information used for the evaluation	Possibility that the pest could become associated with the commodity Cryphonectria parasitica is present in the UK, although not widely distributed, while its main host, i.e. Castanea spp., has scattered distribution in the UK. Despite there is high uncertainty on the level of susceptibility of Acer spp. to the pathogen, infection courts (e.g. pruning and grafting wounds, accidental breaking of twigs before export) are expected to be present. The main hosts can be present either inside or in the surroundings of the nurseries. Altogether, this suggests that the association with the commodity, although unlikely, may be possible. Measures taken against the pest and their efficacy General measures taken by the nurseries are effective against the pathogen. These measures include (a) the use of certified plant material; (b) inspections, surveillance, monitoring, sampling and laboratory testing; (c) hygiene measures with particular reference to the disinfection of tools and (d) application of pest control products. Interception records In the EUROPHYT/TRACES‐NT database, there are no records of notification of Acer plants for planting neither from the UK nor from other countries due to the presence of C. parasitica between the years 1995 and December 2022 (EUROPHYT/TRACES‐NT, online). Shortcomings of current measures/procedures None observed. Main uncertainties – The level of susceptibility of Acer spp. to the pathogen. – Whether symptoms may be promptly detected. – The presence/abundance of the pathogen in the area where the nurseries is located. – Effect of fungicide treatments against the pathogen. – Whether disinfection of tools is performed using products active against the pathogen.

Overview of the evaluation of Cryphonectria parasitica for bare root plants/trees and plants in pots up to 7 years old
Rating of the likelihood of pest freedom	Pest free with some exceptional cases (based on the Median).
Percentile of the distribution	5%	25%	Median	75%	95%
Proportion of pest‐free plants	9,954 out of 10,000 plants	9,975 out of 10,000 plants	9,985 out of 10,000 plants	9,992 out of 10,000 plants	9,997 out of 10,000 plants
Percentile of the distribution	5%	25%	Median	75%	95%
Proportion of infected plants	3 out of 10,000 plants	8 out of 10,000 plants	15 out of 10,000 plants	25 out of 10,000 plants	46 out of 10,000 plants
Summary of the information used for the evaluation	Possibility that the pest could become associated with the commodity Cryphonectria parasitica is present in the UK, although not widely distributed, while its main host, i.e. Castanea spp., has scattered distribution in the UK. Despite there is high uncertainty on the level of susceptibility of Acer spp. to the pathogen, infection courts (e.g. pruning and grafting wounds, accidental breaking of twigs before export) are expected to be present. The main hosts can be present either inside or in the surroundings of the nurseries. Altogether, this suggests that the association with the commodity, although unlikely, may be possible. Measures taken against the pest and their efficacy General measures taken by the nurseries are effective against the pathogen. These measures include (a) the use of certified plant material; (b) inspections, surveillance, monitoring, sampling and laboratory testing; (c) hygiene measures with particular reference to the disinfection of tools; and (d) application of pest control products. Interception records In the EUROPHYT/TRACES‐NT database, there are no records of notification of Acer plants for planting neither from the UK nor from other countries due to the presence of C. parasitica between the years 1995 and December 2022 (EUROPHYT/TRACES‐NT, online). Shortcomings of current measures/procedures None observed. Main uncertainties – The level of susceptibility of Acer spp. to the pathogen. – Whether symptoms may be promptly detected. – The presence/abundance of the pathogen in the area where the nurseries is located. – Effect of fungicide treatments against the pathogen. – Whether disinfection of tools is performed using products active against the pathogen.