EWRS webinar series 2021 Part 5: Weed invasions and Climate Change

Presentations by Dr. Guillaume Fried, ANSES, France and Dr. Yan Sun, University of Fribourg, Switzerland

Online webinar 14:00 - 15:30 CET, 31st of March 2021

EWRS webinar series 2021

This year, a group of EWRS members got together to develop a webinar series covering a wide range of innovative topics that are of interest to everyone involved in weed science and management. Join our webinars to follow a stimulating discussion about the latest research tools and management practices for sustainable weed management. You can download the full programme HERE.

Please subscribe here to receive the webinar link by email from "newsletter@ewrs.org" a few days before the webinar (registration deadline is 11 am on 31st of March 2021). You will receive a first confirmation email for your successful registration and in the following, on the latest between 11 and 12 am CET on the day of the webinar, you will receive the mail with the link for the Zoom webinar. Please whitelist this e-mail-address if you are not a regular receiver of the newsletter.

If you do not receive the email with the link to the webinar by 12.00 on Wednesday 31st March, please contact us directly: newsletter@ewrs.org.

The presentations:

On the 31rd of March, Dr. Guillaume Fried, Anses, France, will present "Ambrosia trifida as an emerging invasive weed and the EPPO Pest risk analysis for invasive species" and Dr. Yan Sun, University of Fribourg, Switzerland, will talk about the "Evolutionary effect of climate change and plant invasions".

14:00 - 14:45

Dr. Guillaume Fried - ANSES, France: 

Pest Risk Analysis or how to avoid the introduction and spread of new invasive alien plants. A case-study with Ambrosia trifida in Europe

Short CV 

I am a botanist and weed ecologist working at Anses (French Plant Health Laboratory). My research work is aimed at assessing the impact of human activities on the environment. 
I study two main models:  i) the effects of alien plants introduction and their impact on wild vegetation or crops, and  ii) the impact of agricultural practices on the flora of cultivated fields and field borders. I use and test hypotheses of community ecology with functional approaches. 


Phytosanitary regulations are part of the preventive strategies that can help to avoid the introduction of new invasive alien weeds and/or to organise an official and coordinated control of recently introduced weeds that are still localised. The case of Ambrosia trifida will be developed on the basis of the recent pest risk analysis carried out on this species by the European and Mediterranean Plant Protection Organisation (EPPO). 

14:45 - 15:30

Dr. Yan Sun – University of Fribourg, Switzerland: 

Rapid evolution of a plant invader in response to biocontrol and climate change 

Short CV

2017-present University of Fribourg, Switzerland, Postdoc
2016-2017 University of Tübingen, Germany, Postdoc 
2014-2015 University of California, Berkeley, USA, Postdoc 
2009-2013 University of Fribourg, Switzerland,PhD 



In 2016, we started an experimental evolution study to get insights into the evolvability to a biocontrol insect and global warming of the European plant invader, Ambrosia artemisiifolia. I will present the genomic and metabolomic differentiations, some of our phenotyping results of the offspring plant performance and resistance in common environment, and preliminary results of soil abiotic property and microbial differences among different field selection treatments.