View
162
Download
2
Category
Tags:
Preview:
DESCRIPTION
Citation preview
Survey of weeds in maize crops in Europe
Per Kudsk & P.K. JensenAarhus University
Denmark
Background
Study commissioned by MonsantoMain purpose was to develop a complete list of weeds rather than an exact classification of their frequencyData collected by contacting national expertsContributions in the form of
Questionnaire (very common, common or less common/rare)
Questionnaire
Background
Study commissioned by MonsantoMain purpose was to develop a complete list of weeds rather than an exact classification of their frequencyData collected by contacting national expertsContributions in the form of
A questionnaire (very common, common or less common/rare) Recent weed surveysWeed occurrence in herbicide efficacy trials
Contributors
V. Bibard & J.-B. Thibord, FranceE. Czembor, PolandS. Dumitru, Romania G. Foucart, BelgiumR.J. Froud-Williams, UKP.K. Jensen & J.E. Jensen, DenmarkM. Saavedra & A.Taberner, Spain M. Sattin, ItalyJ. Soukup, Czech RepublicW. Voegler, Germany
Maize area in surveyed countries
Overall results
203 weed species belonging to 42 families were reported61 weed species were assessed as being ”very common” in at least one countryChenopodium album was the only weed species classified as ”very common” in all countries
Chenopodium album
Very common
Common
Less common/rare
Very rare/absent
Amaranthus spp.
Very common
Common
Less common/rare
Very rare/absent
Ambrosia artemisifolia
Very common
Common
Less common/rare
Very rare/absent
Datura stramonium & Stellaria media
Very common
Common
Less common/rare
Very rare/absent
Echinochloa crus-galli & Setaria spp.
Very common
Common
Less common/rare
Very rare/absent
Poa anua & Elymus repens
Very common
Common
Less common/rare
Very rare/absent
http://web.agrsci.dk/djfpublikation/index.asp?action=show&id=1113
Recommended