Identifying the sensitive habitats with high invasibility is critical for management of biological invasion. Ragweed (Ambrosia artemisiifolia Linn.) has been identified as one of the most dangerous invasive exotic species in many countries throughout the world. The experiment took ragweek as a...

Since the beginning of common ragweed registration in North Rhine-Westphalia in 2007 there have been 427 ragweed records, among them 31 populations with more than 100 individuals. Common ragweed is not yet established in North Rhine-Westphalia but seems to do very well on sandy soils in the...

The spread and durability of harmful neophytes such as Ambrosia (ragweed) will increase due to global warming and ever rising globalization. Therefore, in the past years two Ambrosia spp. have established in Berlin. The "Berlin Action programme against Ambrosia" was started in order to monitor the...

In the seventh year after the publication of the Federal Programme of Action aiming at the prevention of the spread of ragweed, an assessment based on 14 criteria is made to which extent the tasks of the programme were implemented by the states. It was validated whether a monitoring system could be ...

Ambrosia artemisiifolia is a quarantine-organisme in Switzerland, which has to be combated compulsary since 2006. For animal feed, a critical value of 10 seeds of ambrosia per kilogram is tolerated. The quality improvement of feed for birds and small animals has led to a considerable decrease of...

The dicotyledonous summer annual common ragweed (Ambrosia artemisiifolia L.) is on the one hand a noxious arable weed and on the other hand an invasive neophyte with a great potential to spread. Various possibilities are known for control of common ragweed in agricultural fields with mechanical and ...

The European Union handed over the regulation of common ragweed (Ambrosia artemisiifolia) to the member states. Austrian administration started to ask for control measures, i.e. the Ministry of Agriculture and most federal states of Austria contributed financially to a 3-years national...

In Germany, an interdisciplinary working group Ambrosia has been established in 2005. The group consists of experts in the fields of botany and ecology, plant protection, medicine and aerobiology. It has met annually and strives to reduce the occurrence and the impacts of annual ragweed in Germany. ...

The EU-COST Action FA1203 on "Sustainable management of Ambrosia artemisiifolia in Europe (SMARTER)" was successfully launched in February 2013 and will last for four years. Thirty-three countries have already signed the Memorandum of Understanding and over 180 researchers with specialists in weed...

This proceedings contains 20 papers focusing on the current situation and dangers posed by ragweed (Ambrosia artemisiifolia) invasion in Germany. The ragweed situation in neighbouring countries are presented and the various methods used in the control of this invasive weed are highlighted. New...