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Syngenta seeks US OK for GM maize RIBs

Syngenta has applied for US EPA approval for two genetically modified insect-resistant refuge-in-a-bag (RIB) maize trait combinations. Viptera 3220 E-Z refuge offers a dual mode of action against above-ground lepidopteran pests and includes a 5% refuge. It combines Syngenta’s Bt Vip3A toxin, Bt11 (Cry1Ab) and DuPont/Dow AgroSciences’ Herculex 1 (Cry1F) and provides tolerance to the herbicides, glyphosate and glufosinate-ammonium. Viptera 3122 E-Z refuge provides a 5% refuge for above- and below-ground pests. It combines Vip3A, Agrisure RW (mCry3A) and 5307 (eCry3.1Ab). Syngenta applied for USDA deregulation of 5307 last year, with commercialisation planned for 2014 ( Agrow No 606, p 24).


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