During an IRS general assembly in 2011, the first Saturday of Summer has been proclaimed as the International Ragweed Day. The goal has been to increase awareness of the problem this invasive weed causes all over the world. The day was chosen because it is early in the growing season of the plant thereby gives enough time for preparations and actions.
We are inviting all people involved in the fight against ragweed to share with us events which will be organized around the 22nd of June 2019 (contact: gilles.oliver(at)rnsa.fr).
Download the leaflet of the International Ragweed Day (thanks to the French Ragweed Observatory)
You can also add the following picture in the signature of your emails to promote the event:
During last International Congress on Aerobiology, two sessions were dedicated to “Invasive ragweed species in Europe”. Please find below some slides of these two sessions.
During the last International Congress on Aerobiology in Parma, there was the first International Ragweed Workshop organized by the International Ragweed Society.
After an introduction by Maira Bonini, there were several talks about ragweed:
- Allergy to ragweed and allergens involved (by Michel Thibaudon)
- Ragweed in Europe: how to identify different species and understand their invasive potential (by Chiara Montagnani)
- How to distinguish Ambrosia pollen from other similar pollens? (by Branko Sikoparija)
- How to manage the Ambrosia plants? (by Rea Maria Hall)
- The ragweed leaf beetle Ophraella Communa: its taxonomy, morphology and biology (by Heinz Mueller-Scharer)
The booklet with the slides of all these talks is now available. You can dowload it by clicking on the following links:
Part 1 – Part 2
During the 11th International Congress on Aerobiology (Parma, 3rd to 7th of September 2018), the new board of the International Ragweed Society has been elected:
President: Michel THIBAUDON (France)
Vice-President : Uwe STARFINGER (Germany)
Secretary: Sandra CITTERIO (Italy)
Treasurer: Roberto ALBERTINI (Italy) / Olivier PECHAMAT (France)
Webmaster: Gilles OLIVER (France)
Maira BONINI (Italy) stays involved in the board as Past President.
Other members of the committee are Sevcan CELENK (Turkey) and Lazlo MAKRA (Hungary).
Chantal DECHAMP (France) has been nominated honorary member.
The French ragweed observatory has made a new leaflet dealing with 9 invasive species, among which Ambrosia artemiisifolia L. and Ambrosia trifida. You can consult this well detailed document (in French) here.