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AHDB applies for Emergency Authorisations after Vydate ban

Following an announcement that nematode treatment Vydate 10g has not been re-authorised and as of 1 January this year it is no longer approved for use in the UK, the Agriculture and Horticulture Development Board has applied for emergency approval to provide limited use of the product for the 2021 growing season.

Unsuccessful reapplication

AHDB has received the following communication from Corteva.

‘It is with great disappointment that I have to advise you that the UK application for re-authorisation of Vydate 10G for use in 2021 has not been successful, despite our best efforts over recent months.

Corteva AgriscienceTM received a communication from CRD late on 24th December to inform us that Vydate® 10G has not been re-authorised for sale, distribution and use in the UK beyond 31st December 2020.

CRD have granted an amendment to allow the disposal and storage of Vydate 10G until the 28th February 2021. We are currently seeking clarification from CRD with regards to the implementation of the return and disposal plans.

Emergency approval applications

Following consultation with stakeholders AHDB submitted requests for emergency approvals for those Vydate uses where growers lack alternative pest control options i.e.

  • Carrots and parsnips (Free-living nematodes)
  • Bulb onions, garlic and shallots for the control of stem and bulb eelworm (Ditylenchus dipsaci).
  • Potato (Free Living Nematodes)
  • Potato (short-season set-skin potatoes for the control of potato cyst nematodes)

It is hoped these applications will get to the January ECP meeting.

Alternative products

 Activity and targetHarvest interval
Nemathorin, contains fosthiazatePCN and spraing resulting from tobacco rattle virus (TRV) transmitted by species of free-living nematodes,  belonging to the genera Trichodorus and Paratrichodorus.Once planted the crop must be grown for a minimum of 119 days (17 weeks) before being desiccated or lifted green-top, whichever comes first.If a crop starts to senesce before 119 days the grower should consider a pre-lifting residue test. 
Velum Prime, contains fluopyramFor the suppression of plant parasitic nematodesNone. Latest application at planting of potatoes or drilling of carrots.
Nemguard PCN, contains garlicFor the reduction in potato cyst nematode populationsNone. Latest application at planting of potatoes or drilling of carrots

Relevant information

AHDB provides guidance and publications on the control of potato cyst nematode (PCN) via ahdb.org.uk/PCN

Technical information

PCN publicationsPlant Parasitic Nematodes (fact sheet 2015)Research report – controlling free living nematode populationsRisk report from field trials – controlling free living nematode populations

Online events discussing nematode control

Event recording – Agronomy week: Preventing, detecting and controlling nematodes

Forthcoming event: PCN deceiving potato pests with trap crops Tuesday 19 January 12pm – 13pm. Part of AHDB Strategic Potato Farm Week – book here

Source: AHDB

Lukie Pieterse, Editor and Publisher of Potato News Today

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