Here are a few pictures taken at the conference.



Second International Ragweed Conference

March 28-29, 2012, Lyon, France




"Ambroisie, the first international ragweed review": n27 of June 2012 is available with several papers based on 2nd IRC communications.

If you want to order it (for free), just ask to RNSA by email:


Please find below all the communications (pdf) of the Second International Ragweed Conference:

Oral communications

Poster communications


Closing remarks by Dr. Tamas Komives (Society President) on March 29, 2012


Bonjour Mesdames et Messieurs,

I am honored to make the closing remarks on behalf of the International Ragweed Society. 

First I would like to congratulate Dr. Michel Thibaudon, our Society’s Secretary General, and his colleagues for organizing this event with such professionalism, enthusiasm, and commitment.

Yes, the Ambrosia problem can be solved – but it is an uphill battle. The only way is to use all the tools that we have, and use them in a flexible, integrated, and sustainable manner. Each and every region has to have its own strategy, and the European Union needs one, too. Clear goals need to be set, with focal points, and points of reference. There should be one committee in charge, and one person responsible.

In addition, the countries need to cooperate and continuosly exchange information. The sooner the coordinated work begins the better.

Before I finish let me call your attention once more to the International Ragweed Day: I urge you to take advantage of its existence. Talk with your neighbors, your colleagues, people in the media and in politics: make them involved.

I am pleased that we had so many participants at this excellent meeting and I wish you a lot of success in suppressing the spread and the harmful effects of ragweed.

I thank you for your attention.



Conference Chairs are Michel Thibaudon (Reseau National de Surveillance Aerobiologique, France) and Tamas Komives (Plant Protection Institue, Hungary), General Secretary and President of the International Ragweed Society, respectively.

The conference will be jointly organized with "Ambrosia 2012" (French Ministry of Health) and will focus on the theoretical and practical aspects of the spread of ragweed in Europe. Basic research together with field applications will be emphasized, along with laboratory, pilot, and modeling studies leading to innovative approaches. Platform and poster presentations will be selected by the technical program committee from abstracts submitted for consideration.

Abstracts are due January 15, 2012.

A sample abstract is readable here.

The conference program is readable here.

The number of participants is limited to 100 - we advise you to register early.

A Registration Form is downloadable here.

Therefore, please fill in the Registration Form and send it with the Abstract of your presentation to Dr. Michel Thibaudon via e-mail not later than January 15, 2012. Fees will be due only upon receipt of confirmation of participation by the Organizing Committee. Registration fee includes list of participants, and book of abstracts.

You may also register on the website of "Ambrosia 2012".


The conference will consist of the following topics

1. Biology of ragweed
2. Ecology of ragweed
3. Spread of ragweed: current situation
4. Ragweed pollen: factors influencing its production and spreading
5. Ragweed pollen allergy: immunological and public health issues
6. Ragweed pollen allergy: veterinary aspects
7. Ragweed: innovative control methods

Local Organizing Committee

Tamas Komives, Plant Protection Institute, HAS, Hungary
Michel Thibaudon, Reseau National de Surveillance Aerobiologique, France

Join us - enjoy the benefits!

Registration fees for IRC members

Euro 160.- Early registration (before January 15, 2012)
Euro 200.- Registration after January 15, 2012
Euro 210.- Joint registration for 2nd IRC and Ambrosia 2012 (before January 15, 2012)
Euro 250.- Joint registration for 2nd IRC and Ambrosia 2012 (after January 15, 2012)
Euro 60.- Accompanying Person Registration
Euro 60.- Student Registration

Registration fees for non-members

Euro 175.- Early registration (before December 31, 2011)
Euro 220.- Registration after December 31, 2011
Euro 225.- Joint registration for 2nd IRC and Ambrosia 2012 (before January 15, 2012)
Euro 270.- Joint registration for 2nd IRC and Ambrosia 2012 (after January 15, 2012)
Euro 60.- Accompanying Person Registration
Euro 60.- Student Registration


If you have questions or comments or would like to be added to the mailing list, please contact the symposium organizers at or call +33 (0)474 261 948.

Site last updated on February 2, 2012

Plant Protection Institute, HAS

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