Overview of the evaluation of Phytophthora ramorum (non‐EU isolates) for bundles of whips and transplants 1–2 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 bundles	9959 out of 10,000 bundles	9976 out of 10,000 bundles	9986 out of 10,000 bundles	9994 out of 10,000 bundles	9998.7 out of 10,000 bundles
Percentile of the distribution	5%	25%	Median	75%	95%
Proportion of infected bundles	1.3 out of 10,000 bundles	6 out of 10,000 bundles	14 out of 10,000 bundles	24 out of 10,000 bundles	41 out of 10,000 bundles
Summary of the information used for the evaluation	Possibility that the pest could become associated with the commodityPhytophthora ramorum is present in the UK with a restricted distribution. The pathogen has a wide host range including one species of Corylus (C. cornuta var. californica) and in addition C. avellana is reported as an experimental host. The main hosts (e.g. Rhododendron spp., Larix spp. etc.) can be present either inside or in the surroundings of the nurseries. Aerial inoculum could be produced on these host plants and cause bark and leaf infections on the commodity.
	Measures taken against the pest and their efficacy Phytophthora ramorum is a quarantine pest in the UK and under official control. General measures taken by the nurseries are effective against the pathogen. These measures include (a) the use of certified plant material and growing media; (b) inspections, surveillance, monitoring, sampling and laboratory testing; (c) hygiene measures and (d) application of pest control products. Interception records In the EUROPHYT/TRACES‐NT database there are no records of notification of C. avellana plants for planting neither from the UK nor from other countries due to the presence of P. ramorum between the years 1995 and July 2023 (EUROPHYT, online; TRACES‐NT, online). Shortcomings of current measures/procedures None observed. Main uncertainties – The level of susceptibility of C. avellana to the pathogen. – Whether symptoms may be promptly detected. – The presence/abundance of the pathogen in the area where the nurseries are located. – Effect of fungicide treatments against the pathogen.

Overview of the evaluation of P. ramorum (non‐EU isolates) for bundles of cell grown plants 1–2 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 bundles	9970 out of 10,000 bundles	9981 out of 10,000 bundles	9989 out of 10,000 bundles	9995 out of 10,000 bundles	9999.3 out of 10,000 bundles
Percentile of the distribution	5%	25%	Median	75%	95%
Proportion of infected bundles	0.7 out of 10,000 bundles	5 out of 10,000 bundles	11 out of 10,000 bundles	19 out of 10,000 bundles	30 out of 10,000 bundles
Summary of the information used for the evaluation	Possibility that the pest could become associated with the commodity Phytophthora ramorum is present in the UK with a restricted distribution. The pathogen has a wide host range including one species of Corylus (C. cornuta var. californica) and in addition C. avellana is reported as an experimental host. The main hosts (e.g. Rhododendron spp., Larix spp. etc.) can be present either inside or in the surroundings of the nurseries. Aerial inoculum could be produced on these host plants and cause bark and leaf infections on the commodity. Measures taken against the pest and their efficacy Phytophthora ramorum is a quarantine pest in the UK and under official control. General measures taken by the nurseries are effective against the pathogen. These measures include (a) the use of certified plant material and growing media; (b) inspections, surveillance, monitoring, sampling and laboratory testing; (c) hygiene measures and (d) application of pest control products. Interception records In the EUROPHYT/TRACES‐NT database there are no records of notification of C. avellana plants for planting neither from the UK nor from other countries due to the presence of P. ramorum between the years 1995 and July 2023 (EUROPHYT, online; TRACES‐NT, online). Shortcomings of current measures/procedures None observed. Main uncertainties – The level of susceptibility of C. avellana to the pathogen. – Whether symptoms may be promptly detected. – The presence/abundance of the pathogen in the area where the nurseries are located. – Effect of fungicide treatments against the pathogen.

Overview of the evaluation of P. ramorum (non‐EU isolates) for bare root plants 1–7 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	9950 out of 10,000 plants	9971 out of 10,000 plants	9984 out of 10,000 plants	9993 out of 10,000 plants	9999 out of 10,000 plants
Percentile of the distribution	5%	25%	Median	75%	95%
Proportion of infected plants	1 out of 10,000 plants	7 out of 10,000 plants	16 out of 10,000 plants	29 out of 10,000 plants	50 out of 10,000 plants
Summary of the information used for the evaluation	Possibility that the pest could become associated with the commodity Phytophthora ramorum is present in the UK with a restricted distribution. The pathogen has a wide host range including one species of Corylus (C. cornuta var. californica) and in addition C. avellana is reported as an experimental host. The main hosts (e.g. Rhododendron spp., Larix spp. etc.) can be present either inside or in the surroundings of the nurseries. Aerial inoculum could be produced on these host plants and cause bark and leaf infections on the commodity. Measures taken against the pest and their efficacy Phytophthora ramorum is a quarantine pest in the UK and under official control. General measures taken by the nurseries are effective against the pathogen. These measures include (a) the use of certified plant material and growing media; (b) inspections, surveillance, monitoring, sampling and laboratory testing (c) hygiene measures and (d) application of pest control products. Interception records In the EUROPHYT/TRACES‐NT database there are no records of notification of C. avellana plants for planting neither from the UK nor from other countries due to the presence of P. ramorum between the years 1995 and July 2023 (EUROPHYT, online; TRACES‐NT, online). Shortcomings of current measures/procedures None observed. Main uncertainties – The level of susceptibility of C. avellana to the pathogen. – Whether symptoms may be promptly detected. – The practicability of inspections of older trees. – The presence/abundance of the pathogen in the area where the nurseries are located. – Effect of fungicide treatments against the pathogen.

Overview of the evaluation of P. ramorum (non‐EU isolates) for plants in pots up to 15 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	9939 out of 10,000 plants	9965 out of 10,000 plants	9980 out of 10,000 plants	9990 out of 10,000 plants	9997.6 out of 10,000 plants
Percentile of the distribution	5%	25%	Median	75%	95%
Proportion of infected plants	2.4 out of 10,000 plants	10 out of 10,000 plants	20 out of 10,000 plants	35 out of 10,000 plants	61 out of 10,000 plants
Summary of the information used for the evaluation	Possibility that the pest could become associated with the commodity Phytophthora ramorum is present in the UK with a restricted distribution. The pathogen has a wide host range including one species of Corylus (C. cornuta var. californica) and in addition C. avellana is reported as an experimental host. The main hosts (e.g. Rhododendron spp., Larix spp. etc.) can be present either inside or in the surroundings of the nurseries. Aerial inoculum could be produced on these host plants and cause bark and leaf infections on the commodity. Measures taken against the pest and their efficacy Phytophthora ramorum is a quarantine pest in the UK and under official control. General measures taken by the nurseries are effective against the pathogen. These measures include (a) the use of certified plant material and growing media; (b) inspections, surveillance, monitoring, sampling and laboratory testing (c) hygiene measures and (d) application of pest control products. Interception records In the EUROPHYT/TRACES‐NT database there are no records of notification of C. avellana plants for planting neither from the UK nor from other countries due to the presence of P. ramorum between the years 1995 and July 2023 (EUROPHYT, online; TRACES‐NT, online). Shortcomings of current measures/procedures None observed. Main uncertainties – The level of susceptibility of C. avellana to the pathogen. – Whether symptoms may be promptly detected. – The practicability of inspections of older trees. – The presence/abundance of the pathogen in the area where the nurseries are located. – Effect of fungicide treatments against the pathogen.