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Université de Fribourg

Biological weed control to relieve millions from Ambrosia allergies in Europe

Schaffner, Urs ; Steinbach, Sandro ; Sun, Yan ; Skjøth, Carsten A. ; Weger, Letty A. de ; Lommen, Suzanne T. ; Augustinus, Benno A. ; Bonini, Maira ; Karrer, Gerhard ; Šikoparija, Branko ; Thibaudon, Michel ; Müller-Schärer, Heinz

In: Nature Communications, 2020, vol. 11, no. 1, p. 1745

Invasive alien species (IAS) can substantially affect ecosystem services and human well-being. However, quantitative assessments of their impact on human health are rare and the benefits of implementing IAS management likely to be underestimated. Here we report the effects of the allergenic plant Ambrosia artemisiifolia on public health in Europe and the potential impact of the accidentally...

Université de Fribourg

Isolation of 12 polymorphic tetranucleotide microsatellite markers of the leaf beetle Ophraella communa, a promising Ambrosia biocontrol agent also in Europe

Bordeyne, François ; Müller-Schärer, Heinz ; Bouchemousse, Sarah

In: Biocontrol Science and Technology, 2019, p. 1–8

Following its first record in Europe in 2013, the North American ragweed leaf beetle Ophraella communa, used already as a most successful biocontrol agent against common ragweed in China, is spreading rapidly, asking for a detailed analysis of the potential benefit and risk of this introduction for Europe. Here, we report twelve specific and polymorphic tetranucleotide microsatellite markers,...

Université de Fribourg

Rapid evolution of invasive traits facilitates the invasion of common ragweed, Ambrosia artemisiifolia

Sun, Yan ; Roderick, George K.

In: Journal of Ecology, 2019, vol. 107, no. 6, p. 2673–2687

Invasive alien plants, together with organisms introduced for biological control, are ideal study systems with which to address questions of whether, and how fast, organisms adapt to changing environments. We compared populations of common ragweed, Ambrosia artemisiifolia, from native (USA) and introduced (China) ranges at similar latitudes, together with herbivores introduced for biological...

Université de Fribourg

Estimating economic benefits of biological control of Ambrosia artemisiifolia by Ophraella communa in southeastern France

Mouttet, Raphaelle ; Augustinus, Benno ; Bonini, Maira ; Chauvel, Bruno ; Desneux, Nicolas ; Gachet, Emmanuel ; Le Bourgeois, Thomas ; Müller-Schärer, Heinz ; Thibaudon, Michel ; Schaffner, Urs

In: Basic and Applied Ecology, 2018, vol. 33, p. 14–24

The North American common ragweed, Ambrosia artemisiifolia, which produces highly allergenic pollen, is invasive in different parts of the world, including Europe. In 2013, common ragweed in northern Italy was found attacked by another accidentally introduced species, the North American leaf beetle Ophraella communa, which is used for biological control of common ragweed in China. Since the...

Université de Fribourg

Deciphering the biology of Cryptophyllachora eurasiatica gen. et sp. nov., an often cryptic pathogen of an allergenic weed, Ambrosia artemisiifolia

Kiss, Levente ; Kovács, Gábor M. ; Bóka, Károly ; Bohár, Gyula ; Bohárné, Krisztina Varga ; Németh, Márk Z. ; Takamatsu, Susumu ; Shin, Hyeon-Dong ; Hayova, Vera ; Nischwitz, Claudia ; Seier, Marion K. ; Evans, Harry C. ; Cannon, Paul F. ; Ash, Gavin James ; Shivas, Roger G. ; Müller-Schärer, Heinz

In: Scientific Reports, 2018, vol. 8, no. 1, p. 10806

A little known, unculturable ascomycete, referred to as Phyllachora ambrosiae, can destroy the inflorescences of Ambrosia artemisiifolia, an invasive agricultural weed and producer of highly allergenic pollen. The fungus often remains undetectable in ragweed populations. This work was conducted to understand its origin and pathogenesis, a prerequisite to consider its potential as a biocontrol...