Breaking life cycle of Common Ragweed (Ambrosia artemisiifolia L.) to exhaust seed bank. II. Efficiency of herbicides, used singly or in combination with mowing | Lutte contre l'ambroisie (Ambrosia artemisiifolia L.): briser le cycle de la plante pour epuiser son stock semencier das les sites infestes. II. Efficacite des herbicides, seuls ou en association avec une fauche
2008
Delabays, N. | Bohren, Ch. | Mermillod, G. | Baker, A., Station de recherche Agroscope Changins-Waedenswil ACW, Nyon (Switzerland) | Vertenten, J.
The agricultural, environmental and public health concerns due to Common Ragweed justify a drastic control strategy wherever this invasive species establishes. One such strategy is to deplete the seed bank reserve by inhibiting seed production and thus breaking the plants life cycle. The key time of year to achieve this is during seed development and maturation (end of August to the beginning of October). This article describes the efficacy of several herbicides, used either singly or in conjunction with mowing. Glyphosate is one of the most efficient herbicides for controlling Common Ragweed, however it fails to satisfactorily break the plant life cycle with a single application, especially where populations are dense. In such cases, an initial mowing mid July to limit pollen production followed by an application of glyphosate in August can be recommended. Nevertheless, glyphosate drawbacks, notably regarding water pollution and the development of herbicidal resistance, make it advisable to identify alternative tools as well. Promising results were also obtained with glufosinate and various other herbicides containing 2,4-D, bromoxynil, ioxynil, florasulam, fluroxypyr, and mecoprop-P.
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