US EPA OKs Duracade maize
The US EPA has established a tolerance exemption for the Bt eCry3.1Ab toxin produced by Syngenta’s genetically modified insect-resistant Duracade (5307) maize. It controls corn rootworms ( Diabrotica spp). The EPA proposed the approval of Duracade maize last month ( Agrow No 644, p 21). A USDA deregulation request is under review ( Agrow No 644, p 13). Syngenta plans to stack Duracade with its Agrisure Viptera (MIR162 – Vip3Aa20) and Dow AgroSciences/DuPont’s Herculex RW (DAS59122 – Cry34Ab1 + Cry35Ab1) in the refuge-in-a-bag product, Agrisure Viptera 3222 E-Z Refuge, which is expected to be introduced in 2014 ( Agrow No 630, p 22).