Summary of the Express Pest Risk Analysis for Dickeya dianthicola

PRA area: Poland

Describe the endangered area: The endangered zone in which potential establishment of Dickeya dianthicola may have a significant impact is all areas of potato, tomato crops and ornamental plants such as cloves, hyacinths, dahlias, stonecrops.

Bacteria D. dianthicola has been detected three times in Poland in potato crops and there is a high probability that in the case of crop monitoring it could be detected again. There are no reports about the amount of damage caused by this pathogen that is why we should suppose, that as of today it is not a problem. There is a moderate probability that the bacteria will spread in potato crops. Spreading in greenhouse crops of decorative plants is less likely due to the controlled conditions for such crops. There are no anti-pathogen agent to directly combat the pathogen, the factor limiting occurrence and spreading is phytosanitary inspection of propagating material and compliance with hygiene rules in the place of cultivation.

The possibility of spreading the pathogen in clove growing is assessed as low due to the controlled growing conditions. Imported propagating material comes from places, where D. dianthicola was officially not found. There may be occasional infiltrations of the pathogen this way, but these will be a single cases. The higher risk is related to import of other decorative plants and potatoes. The uncertainty associated with the assessment of pathogen penetration scale with plant material is moderate due to the lack of official reports on the number of intercepts by this pathway.

The possibility of spreading in field crops is assessed as low due to the lack of reports on apperance of infected plants, with high uncertainty related to no literature data available. In greenhouse cultures the probability of pathogen spreading is defined as low, with low uncertainty.

 Phytosanitary risk for the endangered area

(Individual ratings for likelihood of entry and establishment, and for magnitude of spread and impact are provided in thedocument)

High

☐

Moderate

☐

Low

X

Level of uncertainty of assessment

(see Q 18 for the justification of the rating. Individual ratings of uncertainty of entry, establishment, spread and impact are provided in the document)

High

☐

Moderate

X

Low

☐

Other recommendations: