Commission Implementing Regulation (EU) 2015/543 of 1 April 2015 approving the active substance COS-OGA, in accordance with Regulation (EC) No 1107/2009 of the European Parliament and of the Council concerning the placing of plant protection products on the market, and amending the Annex to Commission Implementing Regulation (EU) No 540/2011 Text with EEA relevance