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Conclusion on the peer review of the pesticide risk assessment of the active substance COS-OGA

Posted by:bozhihuili    Published:2014-10-18 11:31

                                           CONCLUSION ON PESTICIDE PEER REVIEW
                Conclusion on the peer review of the pesticide risk assessment of the active 

                                                     Substance COS-OGA1

                                                European Food Safety Authority2

                              European Food Safety Authority (EFSA), Parma, Italy


The conclusions of the European Food Safety Authority (EFSA) following the peer review of the initial risk
assessments carried out by the competent authority of the rapporteur Member State Belgium for the pesticide
active substance COS-OGA are reported. The context of the peer review was that required by Regulation (EC)
No 1107/2009 of the European Parliament and of the Council. The conclusions were reached on the basis of the
evaluation of the representative use of COS-OGA as an elicitor to control powdery mildew (Sphaerotheca
fuliginea) on cucurbits grown under glasshouses. An application for inclusion of COS-OGA in Annex IV of
Regulation (EC) No 396/2005 was assessed. The reliable endpoints concluded as being appropriate for use in
regulatory risk assessment derived from the available studies and literature in the dossier peer reviewed, are
presented. Missing information identified as being required by the regulatory framework is listed.

© European Food Safety Authority, 2014

COS (Chito-OligoSaccharides) -OGA (Oligo-Galacturonic Acid) consists of an oligosaccharide
complex composed of a polyanionic structure stabilized by one polycationic chain. The IUPAC name
is Linear copolymer of α-1,4-D-galactopyranosyluronic acids and methylesterified
galactopyranosyluronic acids (9 to 20 residues) with linear copolymer β-1,4-linked 2-amino-2-deoxyD-glucopyranose 

and 2-acetamido-2-deoxy-D-glucopyranose (5 to 10 residues) the company code is COS-OGA. COS is also known 

as chitosan and OGA is derived from pectin. There is no ISO commonname for this active substance.


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