Seed potatoes (updated 16 July 2019)
A pre planting soil sample must be performed and found clear of Ditylenchus destructor, Ditylenchus dipsaci, Globodera pallida, Globodera rostochiensis, Meloidogyne minor, Pratylenchus crenatus, Pratylenchus neglectus, Pratylenchus goodeyi and Pratylenchus thornei
Wart disease (Synchytrium endobioticum) must never have been found within 1 km of the field in which the crop is grown.
Growing crop tolerances
Viruses PVY, PVM, PLRV: symptomatic plants should not exceed 0.1% at second inspection.
Viruses PVA, PVYN, PVV, TRV, PMTV, Potato aucuba mosaic virus: 0%
Witches broom: 0%
Verticillium wilt: 0%
Inspector's instructions CA/2006/01 apply.
Minimum tolerances for seed export apply, except for:
- Black Scurf (Rhizoctonia): pp to 10% with less than 5% surface area cover or pp to 5% with less than 10% surface area cover
- Common scab (Streptomyces scabiei: up to 10% with less than 5% surface area cover or up to 5% with less than 10% surface area cover
- the combined infection level of Black scurf and Common scab must not exceed 10% by number
- Black dot (Colletotrichum coccodes): up to 5% of tubers may be affected
- Spraing (PMTV and TRV): 0% (minimum 200 tubers cut at inspection)
- Gangrene (Phoma foveata): 0%
- Pink rot (Phytophthora erythroseptica): 0%
- Wet rot: 0.1%
- Skin spot (Polyscytalum pustulans): 0%
- Shrivelled tubers: up to 1%
- Soil: practically no soil
Pre- export tests
- Pink rot: a tuber test for Pink rot must be carried out one month after harvest
- Virus: consignments are subject to ELISA tests for PVA, PVYN, PVV and TBRV and must be found clear prior to dispatch.
- PCN: consignment sampling for Ditylenchus destructor, Ditylenchus dipsaci, Globodera pallida, Globodera rostochiensis, Meloidogyne minor, Pratylenchus crenatus, Pratylenchus neglectus, Pratylenchus goodeyi and Pratylenchus thornei must be conducted and found clear prior to dispatch.
Tubers require to be treated with seed dressings active against Silver scurf (Helminthosporium solani). These will be approved by the Chinese authorities on an annual basis. Containers must be maintained at <7˚C <90% RH.
Packaging: all packaging must be clean and unused
Pallets/packing cases will be marked ‘For export to the Peoples Republic of China’ in Chinese.
Post entry quarantine
On entry into China, 400 tuber samples per consignment will be taken for growing on tests. Although the remainder of the consignment may be planted it will be subject to disposal if quarantine organisms are found in the sample.
Additional declarations to be inserted on the reverse of the phytosanitary certificate for seed potatoes
This batch of seed potatoes complies with the phytosanitary requirements of the 'Phytosanitary protocol for the Supply of UK Solanum tuberosum Seed Potatoes for Import into China'.
Export of microplants and Pre-basic TC minitubers. Export is only allowed if an application for an import permit is granted. Only minitubers originating from producers approved by China can be exported.
All requirements laid down in the UK - China mini tuber protocol should be met. Minitubers produced in peat have to be grown in previously unused medium originating from a supplier approved by SASA Division.
Growing crop tolerances
PBTC tolerances apply.
PBTC tolerances apply, except for:
- Black dot (Colletotrichum coccodes): NIL
- Spraing (TRV & PMTV): NIL
- Dirt and other extraneous matter: 0%
Import permit: required.
A phytosanitary certificate will not be issued without submission of a copy of the import permit. The crop number must be quoted on the certificate.
Packaging: new, unused soft packaging. Each package should state the following information: date of harvest, place of origin, the name of producer, variety and class (Pre-basic TC).
If wood packaging is used (e.g. boxes), this should be treated and certified. Wood material should comply with International Standards for Phytosanitary Measures (ISPM 15) on wood packaging materials.
Designated ports of entry: Beijing, Dalian, Guangzhou.
Procedures upon arrival
After entry, the Chinese authorities will take a sample of 400 tubers for each lot of each variety of mini tubers for quarantine observation in post-entry quarantine plots. During the quarantine observation period, the remaining mini tubers can be transported to production areas approved by the Chinese authorities for isolation planting.
Additional declaration to be inserted on the reverse of the Phytosanitary Certificate for PBTC minitubers:
The consignment complies with the requirements described in the Protocol of Phytosanitary Requirements for the Export of Potato Mini Tuber from the United Kingdom to China signed at Beijing on October 26, 2006 and is free from the quarantine pests of concern to China.