IRS Symposium – relive

IRS Symposium – relive

The International Ragweed Symposium was held on Monday, September 14th 2020 by video. You can see it again on Youtube!

Speakers :

2”35- Chantal Déchamp -Henriette Méon -Patrick Chevrolat -Yves Auda-2020: update on common ragweed remote-sensing data in France

19”55- Heinz Müller-Schärer – How to better predict long-term benefits and risks in weed biocontrol: an evolutionary perspective

42”00- Yan Sun and Heinz Müller-Schärer – Rapid evolution of a plant invader in response to biological control and global warming

58”40 – Michel Thibaudon–Jordina Belmonte –Samuel Monnier –Fanny Vasseur – Can photoperiod parameter limit the northward expansion of Ragweed?

1’31’30 – Arnaud Monty – Sylvain Mahieu – Adrien Delforge – Is it really there or not? Updating the common ragweed (Ambrosia artemisiifolia L.) distribution in Southern Belgium

1’29”25- Marilou Mottet –Quentin Mettray -Ambrosia – birdseeds

1’46”30 – Gerhard Karrer -Mladen Zadravec-Benno Augustinus -Heinz Müller-Schärer-Yan Sun-Barbara Horvatić – Paula Prpić – Dejan Kulijer – Eastward spread of the ragweed leaf beetle Ophraella communa towards the Pannonian plain and the Balkans

2’09″02 – Jordina Belmonte – Chantal Dechamp –Henriette Méon – AFEDA database on airborne Ambrosia pollen concentrations, 1982-2019 (France)

2’26″02 – Diana Deleanu -Corina Bocsan-Ragweed pollen allergy in Transylvania

IRS Symposium – September 14th

IRS Symposium – September 14th

Dear colleagues,

The International Ragweed Symposium, which should have been taken place in Vodice before the Neobiota congress, will be held on Monday, September 14th only by video.

Our French colleagues from the Ambrosia Observatory have accepted to host the organization of this virtual symposium. It will take place from 2.30 pm.

To follow the symposium, please click on the Youtube Live’s link.

Please find the agenda of the symposium here.

We  hope that many of you will take part in our event, sign of your interest in ambrosia.

Program IRS Symposium – 2020 SEPTEMBER 14th

Program IRS Symposium – 2020 SEPTEMBER 14th

For the reason of COVID 19, we decided that our IRS symposium will not be organized in VODICE (Croatia) but only online

To participate online, you must join the symposium 30 minutes before with the Microsoft teams link.

The links will be communicated one week before.

If you just want to see the symposium without asking questions, you can join the symposium with the Youtube Live link.

Before the General Assembly, eight oral presentations and one poster will be at the agenda.

Each presentation will be around 20 minutes long.

The following program can be modified in function of presenters :

CALL FOR ABSTRACTS IRS Ragweed Symposium – 14th September 2020 – Vodice (Croatia)

CALL FOR ABSTRACTS IRS Ragweed Symposium – 14th September 2020 – Vodice (Croatia)

The IRS will organize its General Assembly on September 14th in Vodice, Croatia, just before the 11th International Conference on Biological Invasions (Neobotia 2020 : ).

On this occasion, a short symposium is organized which will deal with Ambrosia topics.

Both oral communication (20 minutes) and poster presentations are welcome.

If you are working on ragweed, you can apply to this call of abstracts to present your work to global Ambrosia experts.

Deadline for abstracts submission: August 1st

Decision on abstracts: August 14th

Free Registration (registration form)

See the call for abstract :



During the international conference EMAPI 2019 Prague, the French Ragweed Observatory interviewed some researchers about Ambrosia species in their country.

The third person interviewed is from Hungary : Zoltán Botta-Dukát D.Sc. From the Centre for Ecological Research, Institute of Ecology and Botany, Vácrátót