Ragwort and grassland-management - a connection? | Gestion des herbages et presence du senocon jacobee
2006
Siegrist-Maag, S. | Suter, M. | Huguenin-Alie, O. | Luescher, A. (Forschungsanstalt Agroscope Reckenholz-Taenikon ART, Zuerich (Switzerland))
Ragwort (Senecio jacobaea L.) is an important weed in various countries (Great Britain, New Zealand). In recent years, the species was also more considered in Switzerland. Our investigation gives an overview of the influence of grassland management on the presence of ragwort and of important site conditions associated with the species. Botanical relevés were carried out on grassland with S. jacobaea occurrence and on neighbouring sites without S. jacobaea. S. jacobaea was most abundant on sites with low nitrogen fertilization and set stocking. Furthermore, the species revealed a high occurrence in open swards and on steep slopes. Ragwort was not present in meadows with high-intensity management. Occasionally, with high seed pressure from neighbouring sites, S. jacobaea could also be found in intensively managed pastures and in extensively managed meadows. We conclude that a long-term control of ragwort can be achieved by promoting dense swards and by preventing S. jacobaea from forming seeds in the pasture and its environment.
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