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Survey of weeds inmaize crops in Europe Per Kudsk & P.K. Jensen    Aarhus University        Denmark
Background Study commissioned by Monsanto Main purpose was to develop a complete list of weeds rather than an exact classi...
Questionnaire
Background Study commissioned by Monsanto Main purpose was to develop a complete list of weeds rather than an exact classi...
Contributors V. Bibard & J.-B. Thibord, France E. Czembor, Poland S. Dumitru, Romania G. Foucart, Belgium R.J. Froud-Willi...
Maize area in surveyed countries
Overall results 203 weed species belonging to 42 families were reported 61 weed species were assessed as being ”very commo...
Chenopodium album                    Very common                    Common                    Less common/rare            ...
Amaranthus spp.                  Very common                  Common                  Less common/rare                  Ve...
Ambrosia artemisifolia                         Very common                         Common                         Less com...
Datura stramonium & Stellaria media                             Very common                             Common            ...
Echinochloa crus-galli & Setaria spp.                               Very common                               Common      ...
Poa anua & Elymus repens                           Very common                           Common                           ...
http://web.agrsci.dk/djfpublikation/index.asp?action=show&id=1113
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Transcript of "Per_Kudsk_Prague11"

  1. 1. Survey of weeds inmaize crops in Europe Per Kudsk & P.K. Jensen Aarhus University Denmark
  2. 2. Background Study commissioned by Monsanto Main purpose was to develop a complete list of weeds rather than an exact classification of their frequency Data collected by contacting national experts Contributions in the form of Questionnaire (very common, common or less common/rare)
  3. 3. Questionnaire
  4. 4. Background Study commissioned by Monsanto Main purpose was to develop a complete list of weeds rather than an exact classification of their frequency Data collected by contacting national experts Contributions in the form of A questionnaire (very common, common or less common/rare) Recent weed surveys Weed occurrence in herbicide efficacy trials
  5. 5. Contributors V. Bibard & J.-B. Thibord, France E. Czembor, Poland S. Dumitru, Romania G. Foucart, Belgium R.J. Froud-Williams, UK P.K. Jensen & J.E. Jensen, Denmark M. Saavedra & A.Taberner, Spain M. Sattin, Italy J. Soukup, Czech Republic W. Voegler, Germany
  6. 6. Maize area in surveyed countries
  7. 7. Overall results 203 weed species belonging to 42 families were reported 61 weed species were assessed as being ”very common” in at least one country Chenopodium album was the only weed species classified as ”very common” in all countries
  8. 8. Chenopodium album Very common Common Less common/rare Very rare/absent
  9. 9. Amaranthus spp. Very common Common Less common/rare Very rare/absent
  10. 10. Ambrosia artemisifolia Very common Common Less common/rare Very rare/absent
  11. 11. Datura stramonium & Stellaria media Very common Common Less common/rare Very rare/absent
  12. 12. Echinochloa crus-galli & Setaria spp. Very common Common Less common/rare Very rare/absent
  13. 13. Poa anua & Elymus repens Very common Common Less common/rare Very rare/absent
  14. 14. http://web.agrsci.dk/djfpublikation/index.asp?action=show&id=1113
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