20th Symposium of the European Weed Research Society

Joint approaches for sustainable weed management

Lleida, Spain, 1st to 4th of July 2025

First Circular of the 20th EWRS Symposium



20th European Weed Research Society Symposium

Joint Approaches for Sustainable

Weed Management

Lleida (Catalonia – Spain), July 1st – 4th, 2025



Dear colleagues,

The European Weed Research Society is pleased to announce that our 20th EWRS Symposium, will take place between the 1st and the 4th of July 2025 in Lleida (Catalonia, Spain) in collaboration with Universitat de Lleida and Agrotecnio Centre.

The theme of the Symposium, “Joint Approaches for Sustainable Weed Management”  reflects the importance of transdisciplinary research integrating agroecological, socio-economic and technological approaches in weed management. The Symposium aims to bring representatives from research, academia, and industry to present and discuss Weed Science and other related research fields from all over the world to share and disseminate their knowledge.

Lleida is the capital of one of the most outstanding and diverse agricultural regions of Spain and the economy of the area is mainly based on agricultural and livestock productions. Lleida is located in Catalonia, in the north-east of Spain and it is easy to get there by train from Barcelona (1h) or Madrid (2h).

It will be the first time that the EWRS Symposium takes place in Spain, although different events of this kind have previously been held, such as the Mediterranean Symposium (Valencia 1989) and several Working Group meetings of the Society. The EWRS Symposium constitutes the most important weed science event at European level and it has become a great networking opportunity for weed scientists from all over Europe and beyond involved in different aspects of weed biology, ecology and management. 

We all share a strong commitment to the EWRS, having actively participated in Symposiums, Working Groups meetings and organizing courses for nearly 40 years. The organization of the 2025 EWRS Symposium is a challenge we face full of enthusiasm and we would like to share this with all our Weed Science colleagues.

We thus invite you to present your most recent research results and to participate in the 20th EWRS Symposium ( that will be held in the Conference Palace “la Llotja de Lleida”. It will be our great pleasure to welcome you to Lleida and we expect to turn our city and University into the European hub of Weed Science during these days!

Looking forward to meeting you in Lleida!


Jordi Recasens

On behalf of the Local Organizing Committee




  • 1 September 2024: Opening of the Call for abstract
  • 30 December 2024: Deadline for abstract submission
  • 1 March 2025: Deadline for submission of final version of abstracts
  • 15 March 2025: Notification of acceptance decision
  • 15 March 2025: Deadline for submission of travel grant request for young researchers
  • 1 April 2025: Preliminary program
  • 15 April 2025: Deadline for early registration. Authors should register before this date to be included in the program
  • 15 June 2025: Deadline for registration
  • 1-4 July 2025: 20th EWRS Symposium


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