Ambrosia control: not only in agriculture!

The reaction of Ambrosia artimisiifolia L. was studied in recent years using field and greenhouse trials in Geneva and in Changins and 2009 in ring tests in various European countries within a EUPHRESCO project. The results showed that Ambrosia reacts on a non-lethal control with re-sprouting and is able to produce – even in reduced quantities – pollen and viable seeds. The choice of control methods depends on the status of the invasion and on the type of the site. The main strategy of all methods must aim preventing the formation of viable seeds and must contain a sequential observation of the treated site. This paper discusses experience on control methods within and outside of agriculture in Switzerland