| Overview of the evaluation of Phytophthora kernoviae 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 | 9,930 out of 10,000 bundles | 9,962 out of 10,000 bundles | 9,980 out of 10,000 bundles | 9,992 out of 10,000 bundles | 9,998.1 out of 10,000 bundles |
| Percentile of the distribution | 5% | 25% | Median | 75% | 95% |
| Proportion of infected bundles | 1.9 out of 10,000 bundles | 8 out of 10,000 bundles | 20 out of 10,000 bundles | 38 out of 10,000 bundles | 70 out of 10,000 bundles |
| Summary of the information used for the evaluation |
Possibility that the pest could become associated with the commodity Phytophthora kernoviae is present in the UK with a restricted distribution. The pathogen has a wide host range including Fagus sylvatica. The main host (e.g. Rhododendron spp.) can be present in the surroundings of the nurseries. Aerial inoculum could be produced on these host plants and cause bark infections on the commodity. Measures taken against the pest and their efficacy P. kernoviae is a provisional 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; and (c) application of pest control products. Interception records In the EUROPHYT/TRACES‐NT database, there are no records of notification of F. sylvatica plants for planting neither from the UK nor from other countries due to the presence of P. kernoviae between the years 1995 and December 2022 (EUROPHYT, online; TRACES‐NT, online). Shortcomings of current measures/procedures None observed.
Main uncertainties
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| Overview of the evaluation of Phytophthora kernoviae for bare root plants/trees 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 | 9,944 out of 10,000 plants | 9,972 out of 10,000 plants | 9,986 out of 10,000 plants | 9,994 out of 10,000 plants | 9,998.5 out of 10,000 plants |
| Percentile of the distribution | 5% | 25% | Median | 75% | 95% |
| Proportion of infected plants | 1.5 out of 10,000 plants | 6 out of 10,000 plants | 14 out of 10,000 plants | 28 out of 10,000 plants | 56 out of 10,000 plants |
| Summary of the information used for the evaluation |
Possibility that the pest could become associated with the commodity Phytophthora kernoviae is present in the UK with a restricted distribution. The pathogen has a wide host range including Fagus sylvatica. The main host (e.g. Rhododendron spp.) can be present in the surroundings of the nurseries. Aerial inoculum could be produced on these host plants and cause bark infections on the commodity. Measures taken against the pest and their efficacy P. kernoviae is a provisional 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; and (c) application of pest control products. Interception records In the EUROPHYT/TRACES‐NT database, there are no records of notification of F. sylvatica plants for planting neither from the UK nor from other countries due to the presence of P. kernoviae between the years 1995 and December 2022 (EUROPHYT, online; TRACES‐NT, online). Shortcomings of current measures/procedures None observed.
Main uncertainties
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| Overview of the evaluation of Phytophthora kernoviae 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 | 9,922 out of 10,000 plants | 9,962 out of 10,000 plants | 9,980 out of 10,000 plants | 9,991 out of 10,000 plants | 9,997.9 out of 10,000 plants |
| Percentile of the distribution | 5% | 25% | Median | 75% | 95% |
| Proportion of infected plants | 2.1 out of 10,000 plants | 9 out of 10,000 plants | 20 out of 10,000 plants | 38 out of 10,000 plants | 78 out of 10,000 plants |
| Summary of the information used for the evaluation |
Possibility that the pest could become associated with the commodity Phytophthora kernoviae is present in the UK with a restricted distribution. The pathogen has a wide host range including Fagus sylvatica. The main host (e.g. Rhododendron spp.) can be present in the surroundings of the nurseries. Aerial inoculum could be produced on these host plants and cause bark infections on the commodity. Measures taken against the pest and their efficacy P. kernoviae is a provisional 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; and (c) application of pest control products. Interception records In the EUROPHYT/TRACES‐NT database, there are no records of notification of F. sylvatica plants for planting neither from the UK nor from other countries due to the presence of P. kernoviae between the years 1995 and December 2022 (EUROPHYT, online; TRACES‐NT, online). Shortcomings of current measures/procedures None observed.
Main uncertainties
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