EPPO RNQP

NAME OF THE ORGANISM: Thanatephorus cucumeris (Rhizoctonia solani) (RHIZSO)

GENERAL INFORMATION ON THE PEST

Name as submitted in the project specification (if different to the preferred name):

Pest category:

Fungi

1- Identity of the pest/Level of taxonomic listing:

Is the organism clearly a single taxonomic entity and can it be adequately distinguished from other entities of the same rank?

Yes

Is the pest defined at the species level or lower?:

Yes

Can listing of the pest at a taxonomic level higher than species be supported by scientific reasons or can species be identified within the taxonomic rank which are the (main) pests of concern?

Not relevant: Seed potato sector, Vegetable propagating and planting material (other than seeds) sector, Ornamental sector

Is it justified that the pest is listed at a taxonomic rank below species level?

Not relevant

Conclusion:

Not evaluated: Seed potato sector, Vegetable propagating and planting material (other than seeds) sector, Ornamental sector

2 – Status in the EU:

Is this pest already a quarantine pest for the whole EU?

Presence in the EU:

Conclusion:

HOST PLANT N°1: Brassica oleracea (BRSOX) for the Vegetable propagating and planting material (other than seeds) sector.

CONCLUSION ON THE STATUS:

Not evaluated: This pest/host combination was not identified by any EU MS in the RNQP Questionnaire as requiring a revision of current thresholds and or a revision of current management measures. This pest/host combination was not identified by the experts of the vegetable SEWG as being a candidate for the RNQP Status with specific tolerance levels and/or specific risk management measures. Experts recommended that this pest/host combination should be covered in the future by the 'substantially free from' requirement that will remain in the Vegetable propagating and planting (excluding seeds) EU Marketing Directives.

HOST PLANT N°2: Chrysanthemum x grandiflorum (Dendranthema x grandiflorum) (CHYHO) for the Ornamental sector.

CONCLUSION ON THE STATUS:

Not evaluated: This pest/host combination was not identified by any EU MS in the RNQP questionnaire as requiring a revision of current thresholds and or a revision of current management measures. This pest/host combination was not identified by the experts of the ornamental SEWG as being a candidate for the RNQP status with specific tolerance levels and/or specific risk management measures. Experts recommended that this pest/host combination should be covered in the future by the 'substantially free from' requirement that will remain in the EU Marketing Directives for ornamentals.

HOST PLANT N°3: Cynara cardunculus (CYUCA) for the Vegetable propagating and planting material (other than seeds) sector.

CONCLUSION ON THE STATUS:

HOST PLANT N°4: Cynara scolymus (CYUSC) for the Vegetable propagating and planting material (other than seeds) sector.

CONCLUSION ON THE STATUS:

HOST PLANT N°5: Dianthus caryophyllus (DINCA) for the Ornamental sector.

CONCLUSION ON THE STATUS:

HOST PLANT N°6: Euphorbia pulcherrima (EPHPU) for the Ornamental sector.

CONCLUSION ON THE STATUS:

HOST PLANT N°7: Gerbera (1GEBG) for the Ornamental sector.

CONCLUSION ON THE STATUS:

HOST PLANT N°8: Solanum lycopersicum (LYPES) for the Vegetable propagating and planting material (other than seeds) sector.

CONCLUSION ON THE STATUS:

HOST PLANT N°9: Solanum melongena (SOLME) for the Vegetable propagating and planting material (other than seeds) sector.

CONCLUSION ON THE STATUS:

HOST PLANT N°10: Solanum tuberosum (SOLTU) for the Seed potato sector.

Origin of the listing:

5 - Seed potato sector: Council Directive 2002/56/EC

Plants for planting:

Plants intended for planting, other than [true] seeds

3 - Is the pest already listed in a PM4 standard on the concerned host plant?

Yes

Conclusion:

Qualified

Justification (if necessary):

Listed in EPPO PM 4/28 Standard (table3) as Black scurf (Rhizoctonia solani).

CONCLUSION ON THE STATUS:

Recommended for listing as an RNQP, based on EPPO PM 4 Standard. The SEWG recalled that a range of symptoms can be caused on the crop, with different impacts, and this should be considered when using common names.

8 - Tolerance level:

Is there a need to change the Tolerance level:

Proposed Tolerance levels:

9 - Risk management measures:

Is there a need to change the Risk management measure:

Proposed Risk management measure:

REFERENCES: