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).
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.
Sarah LABRUYERE and Marilou MOTTET from the French ragweed observatory made an English version of the video on the Ambrosia leaf beetle Ophraella communa (with the participation of Bruno Chauvel, Heinz Mueller-Schaerer, Suzanne Lommen and Benno Augustinus).