EPPO PRA for Oemona hirta
Both the PRA report and the PRA record are available.
O. hirta is a pest of important fruit and forest trees grown in the PRA area. It is extremely polyphagous. It may attack healthy trees. Eradication or containment would be unlikely due to the hidden life stages of the pest and the fact that it might not be detected before it has already established and caused damage. It is also very likely that the pest would spread (natural spread as it is a strong flier; human-assisted through movement of infested material).
The probability of entry is considered moderately likely with a medium uncertainty. However the pest has been found in imported Wisteria plants in the UK in 1983 and 2010. It was considered that currently the only relevant pathway for entry was plants for planting. There is uncertainty regarding the volumes imported into the PRA area (although they are considered to be low), as well as for the association of the pest with the pathways at origin. Low volumes of imports are the main reason for the low likelihoods of entry attributed to the pathways. However if trade of wood, wood chips and wood waste increase, entry is also possible with these commodities. Therefore requirements have been defined for them too.
The probability of establishment is high (with a medium uncertainty). Climatic conditions are considered appropriate in most of the PRA area and there are numerous hosts in a variety of habitats. The uncertainty is linked to the lack of knowledge on the pest biology (e.g. possibility to establish in the colder or hot-dry parts of the PRA area).
The rate of natural spread is low-moderate and the spread by human means is very high. Satellite populations may be established in multiple locations through human spread, but natural spread from these outbreaks will be relatively slow. The overall rate of spread (i.e. increase in infested area) is rated as moderate with a high uncertainty as it is difficult to know if spread will occur naturally or via human assistance.
The potential economic impact is considered as moderate with medium uncertainty. The whole area of potential establishment is at risk of an economic impact. O. hirta is likely to have moderate to major economic impact for Citrus spp. and persimmon. On other crop species, it is expected to have generally minor economic impact, although major impacts cannot be excluded in the case of local outbreaks on crops such as grapevine. The southern part of the PRA area where Citrus sp. are grown is most endangered.
2021: The PRA documents were modified to clarify the phytosanitary measures recommended
- Bosnia and Herzegovina
- Czech Republic
- North Macedonia
- United Kingdom