In the future European farmers will be facing numerous challenges turning weed management more difficult and knowledge-intensive.Firstly many active ingredients have been removed from the market in recent years following a review programme of existing pesticides that was done under the conditions of Directive 91/414/EEC. The review programme was initiated in 1992 and finished in 2009. Of the more than 1000 active ingredients registered before Directive 91/414/EEC went into force in 1993 only 26 % were approved for re-registration and among the active ingredients lost were also many herbicides. During the same period only around 150 new active ingredients were registered in the EU. In 2011 Directive 91/414/EEC was replaced by Regulation 1107/2009. Along with the regulation came some new initiatives (hazard criteria and comparative assessment) that are expected to make pesticide registration in the EU stricter and thus further reduce the number of herbicide active ingredients.
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