Abstract: | The main principles concerning the authorization of plant protection products containing microorganisms in the European Union are explained: a positive list of microorganisms to be adopted by the Commission, authorization of individual plant protection products by the Member States according to common criteria and data requirements, obligation of mutual recognition of authorizations granted by other Member States subject to comparable conditions. Further detailed provisions are under preparation for the common criteria and data requirements as well as for the rationalization of the procedures for plant protection products containing genetically modified microorganisms. |