Global Compendium of Weeds (GCW) Western Australia Department of Agriculture (AgWest) Hawaiian Ecosystems at Risk project (HEAR) Global Compendium of Weeds: references
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Weber E, Gut D (2005) A survey of weeds that are increasingly spreading in Europe. Agronomy for Sustainable Development 25, 109-121. A Europe-wide survey was conducted by sending questionnaires to weed scientists in order to evaluate currently troublesome weeds and those which may cause problems in the future. Recipients were asked to list species that are spreading and cause problems in agroecosystems and to rate these according to three scores (degree of weediness, degree of spread potential and degree of control success), with three levels for each score (low, medium and high). In all, 281 species were reported from 26 European countries (Albania, Austria, Bulgaria, Croatia, Czech Republic, Cyprus, Denmark, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Lithuania, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Turkey, United Kingdom and Ukraine). Most of them were annuals (48%), followed by perennials (34%) and biennials (14%). Among these 281 weed species, the 15 most troublesome (either indigenous or alien to Europe) have been listed for each crop system defined in this survey. In the table below, the EPPO Secretariat has extracted only weed species which were considered as alien.

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This page was created on 13 September 2007 by PT, and was last updated on 13 September 2007 by PT based on data from Rod Randall's Global Compendium of Weeds database dated 24 January 2007. Valid HTML 4.01!