Legal limits are set to a range of substances of botanic origin. These include ergot infested cereals, and a range of weed seeds. These legal limits are most recently being published in Directive 2002/32/EC.Link to the official website of the European Commission with all relevant legislation: eur-lex.europa.eu
Consolidated version of Directive 2002/32 of 10 February, 2010.
History of Directive 2002/32/EC
Regulation (EC) 1831/2003, last amended on 1 September 2010, provides in the publication of a Register of Feed Additives. Since 2005 a (long) list of botanicals is added.
Updated February, 2011