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Syngenta seeks to test GM maize stacks in US

Syngenta Seeds has applied for a US experimental use permit (EUP) to test genetically modified insect-resistant 5307 maize expressing the Bt eCry3.1Ab toxin for corn rootworm ( Diabrotica spp) control. The toxin is a chimera of the mCry3A and Cry1Ab toxins. Syngenta is seeking to test 5307 maize in combination with three of its approved GM maize lines: Bt11 (Cry1Ab); MIR162 (Vip3Aa20) and MIR604 (mCry3A). It also aims to test stacks with Dow AgroSciences’ Herculex 1 (Cry1F) and Herculex RW (Cry34Ab1 + Cry35Ab1). The EUP application covers 6,889 acres (2,788 ha) of GM maize lines in 2010 and 6,835 acres in 2011 in 28 states plus Puerto Rico. Syngenta gained stacking rights to Dow’s Herculex lines earlier this year ( Agrow No 565, p 2).


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