Pesticides: Active substance approval amendment

 

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Pesticides ebulletin

Issued: 9 January 2026

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

Amendment to the approval of the active substance: clethodim

Following a review of its approval as an active substance for use in PPPs in GB, HSE has decided that clethodim continues to meet the approval criteria set out in assimilated Regulation 1107/2009 (the Regulation) with amendment.

Following assessment of new toxicity studies submitted on metabolite, 3-chloroallyl alcohol (3-chloroallyl alcohol glucoside in treated foodstuffs), HSE has concluded that the approval should be amended to make it subject to new conditions as outlined in Article 6(1) of the Regulation.

In particular new metabolite-specific toxicological reference values for an acceptable daily intake and an acute reference dose are required.

These amendments to the approval conditions will take the form of an update to the list of endpoints and changes will also be reflected with an amendment to the text in the specific provisions of the GB approval for clethodim concerning authorisation of plant protection products.

HSE will take into account the following when assessing an application for authorisation:

  • the consumer exposure with regards to residues of 3-chloroallyl alcohol glucoside that may arise in plants
  • the nature and magnitude of residues in products of animal origin where residues of 3-chloroallyl alcohol glucoside are significant in the diets of livestock


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

The approval conditions of clethodim have now been updated in the GB Approvals Register on the HSE website.

View the updated List of Endpoints under active substance amendments on the HSE website.

No grace period is required as approval can continue.


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