Pesticides: GB MRL amendments and expiry of Trichoderma approval
This ebulletin contains information on the regulation of pesticides in Great Britain

 

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HSE ebulletin

Issued: 4 June 2026

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

GB maximum residue level (MRL) amendments - adopted April 2026

The GB MRL Statutory Register has recently been amended and new statutory levels have been set.

To meet the requirements of international trade, and to accommodate a new authorisation of a plant protection product in GB, new MRLs have been set in the GB MRL Statutory Register for the following active/commodity combinations. The date the new MRLs came into force is also detailed:

1 April 2026

  • Flupyradifurone/ strawberries, potatoes, tropical root and tuber vegetables, flowering brassicas, Brussels sprouts, head cabbages, Chinese cabbages/pe-tsai, kales, kohlrabies, lettuces and salad plants (except escaroles/ broad leaved endives), spinach and similar leaves, herbs and edible flowers, soyabeans, and various products of animal origin
  • Difluoroacetic acid (DFA)/ strawberries, potatoes, tropical root and tuber vegetables, flowering brassicas, Brussels sprouts, head cabbages, Chinese cabbages/pe-tsai, kales, kohlrabies, lettuces and salad plants (except escaroles/ broad leaved endives), spinach and similar leaves, herbs and edible flowers, soyabeans

10 April 2026

  • Prosulfocarb/ Herbs and edible flowers
  • Cyantraniliprole/ Herbs and edible flowers, lettuces and salad plants (except lettuces and others-lettuces and salad plants), spinaches, purslanes, and chards/beet

The evaluation reports, reasoned opinions and decision documents supporting the new MRLs are available on the HSE website.


Expiry of Trichoderma atroviride strain I-1237 approval in GB

The approval of the pesticide active substance Trichoderma atroviride strain I-1237 was not supported for renewal in GB and expired on 31 May 2026.

The statutory approvals register has been updated to reflect this change.

The expiry of this approval will impact PPPs containing Trichoderma atroviride strain I-1237.

Grace periods have been set allowing:

  • 6 months for sale and distribution (30 November 2026)
  • a further 12 months for storage, disposal and use of existing stocks (30 November 2027)


Withdrawal Notices will be updated on the pesticides register.

The expiry of this approval has no immediate impact on the GB maximum residue levels (GB MRLs) which will remain in force unless HSE decides to take specific regulatory action. No such action is currently planned, but GB MRLs may be reviewed at any time based on a priority of protecting UK consumers.

For MRLs, please see the GB MRL Statutory Register.

Stakeholders should note that pesticides is 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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