Can Senecio aquaticus be controlled in agricultural grassland? | Peut-on maîtriser le séneçon aquatique dans les prairies agricoles?
2012
Suter, M. | Stutz, C. J. | Lüscher, A., Forschungsanstalt Agroscope Reckenholz-Taenikon ART, Zuerich (Switzerland) | Gago, R.
In recent years, Senecio aquaticus has become increasingly abundant in agricultural grassland of medium-to- high management intensity in Switzerland, Southern Germany and Austria, where its toxicity poses a threat to animal health. This study aimed to identify measures for controlling S. aquaticus. A detailed field experiment was set up at five sites in Switzerland to test the effectiveness of six treatments: ploughing followed by re-sowing with a ley mixture; harrowing followed by re-sowing; application of a selective herbicide; pulling or digging up individual specimens; mowing once a year; and a control in which no measure was applied. In addition, the soil the seed bank of S. aquaticus was recorded prior to the study. [...]We therefore conclude that controlling established populations of S. aquaticus remains a challenge, requiring the repeated application of measures over several years until the seed bank is depleted. For this reason, the formation of populations with a soil seed bank of S. aquaticus should be prevented by any means.
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