Summary of the Express Pest Risk Analysis for Tomato ringspot nepovirus

PRA area: Poland

Described of the endangered area: the entire PRA area (tree and bush fruits, ornamental plants crops)

Main conclusions: Tomato ringspot nepovirus (TomRSV) may cause serious losses in tree/bush fruits and cultivation of ornamental plants. Virus transfer mechanically and by vaccinations so there is a high risk that the virus may be delivered unconsciously over and between crops (especially when infection is asymptomatic). The most likely way of entry is transfer with seeds. Additionally, some nematodes (genre Xiphinema ) are TomRSV vectors. Virus was not reported in Poland. Most of host plants and some of Xiphinema species (which were not tested as TomRSV vectors) occur in PRA area.

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

X

Low

☐

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

X

Moderate

☐

Low

☐

Other recommendations:

·         Controls of imported propagation material

·         Controls of fields and glasshouses crops

·         Monitoring of vectors

·         More research of virus biology and potential ways of transmission

·         Fruit and ornamental plant producers need to be informed about about import requirements and use only certified virus-free seeds and seedlings

Summary of the Express Pest Risk Analysis for Tomato yellow ring virus

PRA area: Poland

Described of the endangered area: Tomato crops– central Poland; Ornamental plants crops– the entire PRA area

Main conclusions

Tomato yellow ring virus may cause serious losses in cultivations of tomato, potato, ornamental plants. Virus transfer easily in mechanical way. Therefore there is high risk that the virus may be delivered unconsciously over and beetween crops (especially when infections are asymptomatic)

Additionally, risk of TYRV spread increases if vectors (Frankliniella occidentalis and Thrips tabaci) occur.

Virus was detected in Poland in tomato crops (during one vegetation cycle) (Zarzyńska-Nowak et. al 2016). Probably, virus was transfered to Poland with tomato seedlings. There is no more information of virus occurence in PRA area.

TYRV has broad host range but was reported in most cases in tomato crops along with Tomato spotted wilt virus (TSWV).

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

X

Low

☐

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

X

Moderate

☐

Low

☐

Other recommendations:

·         Controls of imported propagation material

·         Monitoring of tomato and potato crops

·         Vectors– Frankliniella occidentalis and Thrips tabaci– monitoring

·         Fruit and ornamental plant producers need to be informed about import requirements and use only certified viroid-free propagation material