Pesticides: expiry of dimethomorph approval in GB

 

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HSE ebulletin

Issued: 2 November 2026

This ebulletin contains information relating to plant protection products (PPPs) in Great Britain.

Expiry of dimethomorph approval in GB

Following a review of its approval, HSE has decided that ​dimethomorph​ no longer meets the approval criteria set out in assimilated Regulation 1107/2009.

Further details, including the decision document, can be found by viewing the GB approval register on the HSE website.

On 31 July 2026, HSE issued an ebulletin that proposed withdrawal of the GB approval of ​dimethomorph​ following a review that indicated it no longer met the approval criteria, required under the Regulation. The ebulletin referred to the next stage of the withdrawal process being consultation with trading partners via the World Trade Organisation (WTO).

This consultation has now concluded.  

Defra and the GB devolved governments have given consent for HSE to carry out the decision-making function arising from this review.  

The approval of ​dimethomorph​ in GB will now expire and therefore ends on 30 November 2026.  

To allow existing stocks to be removed from the supply chain safely, HSE has agreed a phased withdrawal programme. 

  • producers will be permitted ​6 months​ for sale and distribution (31 May 2027) 
  • users will be permitted a further ​12 months​ for storage, disposal and use of existing stocks (31 May 2028) 

Stakeholders should note that pesticides are in scope of the Sanitary and Phytosanitary (SPS) agreement currently being negotiated between the UK and the EU. Once negotiations on the SPS Agreement have concluded, HSE will communicate further on any implications the agreement has for the sector.

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Stress Awareness Week 2026: 2 to 6 November

Stress is the largest cause of work-related ill health in Great Britain. This Stress Awareness Week, check in with your workforce and take practical steps to support good mental health at work.

Visit HSE's Working Minds campaign for practical tools, guidance and resources to help you prevent and manage work-related stress in your workplace. 

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