Update for potato growers

Update for potato growers.

There may still be diquat out on farm and to ensure everyone is aware of the current legislation we felt it appropriate to share the following information.

If anyone has purchased diquat recently or since the cut off date below they should return it to the supplier and ask for a refund.

Last year, the Chemicals Regulation Division of the Health and Safety Executive in the UK gave notice of the withdrawal of the authorisation for use of diquat products.  The notice withdrew them from the market by 31 July 2019, and gave growers a use-up period up to 4 February 2020.

Any ADS claimants using diquat products this season would be in breach of cross compliance standards (SMR 7 – RESTRICTIONS ON THE USE OF PLANT PROTECTION PRODUCTS) https://www.gov.im/media/1356475/chapter-6-ads-cross-compliance.pdf

Update from AHDB, for webinars that have already taken place clicking the link will let you register to watch it again.

Desiccation – we are here to help you!

We are organising two webinars where we will discuss Diquat alternatives. Join us and ask your questions during a live Q&A.
Webinar dates: Tomorrow (19 August) and 16 September

Upcoming webinars

Desiccation webinars

Get an in-field view of this year’s SPot Farm desiccation trials, as we continue to provide independent data on how best to replace diquat as a desiccant. We’ll display drone footage of this year’s crop to show the effect diquat alternatives have had and look at completed trials results from previous seasons.

Desiccation – how to apply diquat alternatives to potato crops

When: 19 August, 3:30pm – 4:30pm

This webinar will cover:

  • Introduction and housekeeping – 5 mins (David Wilson)
  • Summary of last year’s trials – 15 mins (Mark Stalham)
  • Flail video – 5 mins
  • Desiccation trials in seed, 2019 and 2020 – 10 mins (Eric Anderson)
  • What we are looking at this season and why–10 mins (Mark Stalham)
  • Questions –15 mins


  • David Wilson – AHDB Knowledge Exchange Manager
  • Mark Stalham – Head of NIAB CUF
  • Eric Anderson – Senior Agronomist at Scottish Agronomy
Click here to watch a preview of the flail video.

Desiccation – how effective are Diquat alternatives for potato crops?

When: 16 September, 3:30pm – 4:30pm

This webinar will cover:

  • A video of this year’s crop to show effects of desiccants
  • Updates and observations from trials work on this year’s crops
  • Discussion on trials results from previous seasons
  • Interviews with researchers, agronomists and growers
  • A live Q&A – questions can be submitted before or during the event

Chair: Mark Stalham (Head of NIAB CUF)
Speakers: full list TBA

Podcast: Desiccation – solutions for the first season without Diquat

In the first part of this episode we discuss with Mike Shapland, Strategic Potato Farm host in the East region, how he will tackle desiccation this year.

In the second part Dr Mark Stalham, Head of NIAB CUF, talks about the desiccation trials which took place last year and he also offers an update on this year’s trials.

AHDB Potatoes, Stoneleigh Park, Kenilworth, Warwickshire, CV8 2TL

T 02476692051
W potatoes.ahdb.org.uk

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