Herbicide tolerant varieties
working group

The newly created EWRS Working Group Herbicide Tolerant (HT) Varieties did gather for the first time formally on 23rd of November, 2012 at the University of Bingen, Germany. Herbicide tolerant varieties is for this WG defined as the umbrella description for varieties that become tolerant through mutagenesis as well as for varieties that are improved via genetic modification. The active participation of the 23 European scientists from 15 organisations (10 countries) reveal that there is a strong interest in the scientific community to increase understanding of Integrated Weed Management in and Sustainable use of these new agronomic systems in Europe.

The commercial introduction of the HT varieties in Europe goes hand in hand with periodically very polarized and emotional discussions. The members of this new WG committed to look for a scientific and balanced evaluation of the agronomic impact that these HT varieties will cause. Impacts to be studied would include weed management in the new varieties as well as in the overall crop rotation, advantages and/or disadvantages for the rotational systems, watch outs and opportunities for HT varieties in specific agricultural systems, economic as well as agronomic sustainability.

As some HT varieties obtained via mutagenesis are finding their commercial way into European agriculture it was agreed to prioritize the evaluation for some of these crops.

Ivo Brants (Monsanto) was elected as coordinator and Prof Jan Petersen (University Bingen, Germany) was nominated vice coordinator.

A visit to the greenhouses with screening for herbicide resistant weeds and a view on an outdoor trial with ClearField® OSR was an appropriate end of the first meeting of the WG Herbicide Tolerant Varieties.

Interested people are invited to attend the next meeting of the WG Herbicide Tolerant varieties which will be held on Sunday 23rd June, 2013 in Samsun, Turkey (preceding the EWRS symposium) and will be jointly organised with the WG Optimization of Herbicide Dose. An invitation for participation has been extended to the WG Herbicide Resistance (weeds).


"Sustainable Integrated Weed Management and Herbicide Tolerant Varieties"
Joint Workshop of the EWRS working Groups:
"Optimizing herbicide use in an IWM context"
"Herbicide Tolerant varieties"

Date: July 4-6th, 2019
Venue: Thessaloniki, Greece

New Click here to view or download the final programme of the workshop New

There is also a link to the final agenda of the event: https://ewrsworkshop-salonica.eu/full-program/


2017 Workshop of the EWRS working group "Herbicide tolerant varieties"

Date: May 29-31, 2017
Venue: Novi Sad, Serbia

Some of the abstracts and / or Powerpoint presentations of the 2007 Herbicide Tolerant Varieties working group meeting are available at: http://www.ewrs.org/ewrs_htv_2017/default.asp

Chair: Ivo Brants

Bayer - Crop Science
Bayer Agriculture BVBA
Tervurenlaan 270-272
B-1150, Brussels, Belgium

Tel: +32 (0)2 776 78 45
Mobile: +32 (0) 475 400 995
E-Mail: ivo.brants@bayer.com

Co-chair: Jan Petersen

University of Applied Science Bingen
Berlinstr. 109
D-55411 Bingen
Tel.: 0049 0160 9647 4129

E-mail: petersen@fh-bingen.de

The abstracts and / or some of the PowerPoint presentations of the Herbicide Tolerant Varieties working group meeting that took place May 21st, 2014 in Frankfurt, Germany are available at: http://www.ewrs.org/ewrs_htv_2014/default.asp

Meeting of the working group in Samsun - Turkey, 23rd June 2013.
The minutes of the meeting along with some presentations are available here: htv_Samsun_2013.asp

Previous meeting:

The minutes of the inaugural meeting along with some presentations are available here: htv_inaugural_meeting.asp