Chekker
Chekker is a highly selective, post-emergence agricultural herbicide designed for spring weed control. It provides excellent foliar activity, specifically targeting aggressive cleavers and a broad spectrum of annual broad-leaved weeds in cereal crops. 
Identification
MAPP 16495 Great Britain: Pesticide product number assigned by the UK Health and Safety Executive (HSE) for Great Britain. Products containing macro-organisms are authorised differently. MAPP 21870 Great Britain: Pesticide product number assigned by the UK Health and Safety Executive (HSE) for Great Britain. Products containing macro-organisms are authorised differently.
AMM 9900202 France: Pesticide product registration number assigned by the French competent authority - Agence Nationale de Sécurité Sanitaire (Anses). Products containing macro-organisms may be authorised differently.
PCS 01617 Ireland: Pesticide product registration number assigned by the Pesticide Registration and Control Divisions (PRCD) of the Department of Agriculture, Food and the Marine (DAFM), Ireland. Products containing macro-organisms may be authorised differently.
ES 00650 Spain: Pesticide products (productos fitosanitarios) are registered by the Ministry of Agriculture, Fisheries and Food (MAPA), Spain. Products containing macro-organisms may be authorised differently.
CzR 4677-0 Czech Republic: Pesticide product registration number assigned by the Central Institute for Supervising and Testing in Agriculture (ÚKZÚZ), under the Ministry of Agriculture. Products containing macro-organisms may be authorised differently.
UKSUP 18-00342-PO Slovakia: Pesticide Product registration number assigned by ÚKSÚP (–Ústredný kontrolný a skúšobný ústav poľnohospodársky)
Central Controlling and Testing Institute in Agriculture under the Ministry of Agriculture and Rural Development of the Slovak Republic. Products containing macro-organisms may be authorised differently.Active substances
Formulation
UFI and Type
Possible coformulants
Product family
None
Related products
Disclaimer
The information on these pages is provided for the convenience of visitors to this website. The University or Hertfordshire / Agriculture and Environment Research Unit cannot accept any liability for its accuracy or content. Visitors who rely on this information do so at their own risk.
Always read and follow the instructions on the pesticide label.
Other information
The French registered product also lists 12.5% w/w mefenpyr-diethyl in its SDS
Please cite as:
AERU (2026) Pesticide Formulations Catalogue (PFC): Chekker. Agriculture and Environment Research Unit (AERU), University of Hertfordshire, UK. URL: https://sitem.herts.ac.uk/aeru/pfc/Reports/239.htm (Last accessed: 09/10/2026)
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