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. 2022 Feb 8;20(2):e07077. doi: 10.2903/j.efsa.2022.7077
Rating of the likelihood of pest freedom Extremely frequently pest free (based on the Median).
Percentile of the distribution 5% 25% Median 75% 95%
Proportion of pest‐free plants

9,815

out of 10,000 plants

9,902

out of 10,000 plants

9,948

out of 10,000 plants

9,976

out of 10,000 plants

9,992

out of 10,000 plants

Percentile of the distribution 5% 25% Median 75% 95%
Proportion of infected plants

8

out of 10,000 plants

24

out of 10,000 plants

52

out of 10,000 plants

98

out of 10,000 plants

185

out of 10,000 plants

Summary of the information used for the evaluation

Possibility that the pest could become associated with the commodity

The pathogen is not known to be present in the Zhenjiang province, but it is reported from a neighbouring province. However, the presence of suitable telial hosts in the immediate surroundings of the nursery (within 1.5 km) combined with the long dispersal range of aeciospores and uredospores makes the infection of the commodity by means of basidiospores possible. The pathogen may go undetected during inspection before export because an asymptomatic period of at least 6 months has been reported.

Measures taken against the pest and their efficacy

Fungicide treatments (most of active ingredients are systemic) are expected to reduce the likelihood of infection of the pathogen and the rate of colonisation of needles. The official inspections during production and before export are expected to have some effects in detecting the pathogen. However, an asymptomatic period of at least 6 months is reported during which infection cannot be detected visually.

Interception records

In the EUROPHYT/TRACES‐NT database, there are no records of notification of Pinus parviflora and P. thunbergii bonsai plants neither from China nor from other countries due to the presence of Coleosporium eupatorii between the years 1995 and May 2021 (EUROPHYT/TRACES‐NT, online).

Shortcomings of current measures/procedures

No relevant shortcomings.

Main uncertainties
  • Presence of the pathogen in the nursery and in the surroundings.
  • If laboratory analyses are performed.
  • If the fungicides are rotated in order to reduce the likelihood of development of resistant strains of the pathogen.