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EPA approves Syngenta's Agrisure RW corn trait

Agriculture.com Staff 10/04/2006 @ 7:28am

Corn growers will have another rootworm trait to choose from in corn hybrids for 2007. The Environmental Protection Agency (EPA) has granted registration approval for Agrisure RW, a new corn trait developed by Syngenta that controls corn rootworm. Agrisure RW will be available individually and in stacks with Agrisure GT (glyphosate tolerance) in hybrids from NK Brand, Garst, Golden Harvest, and other seed brands for the 2007 planting season.

Agrisure RW will give corn growers a third corn rootworm trait alternative from which to choose. Monsanto markets its YieldGard Rootworm and YieldGard Plus products for rootworm control, while Dow AgroSciences and Pioneer Hi-Bred International offer rootworm control through Herculex RW and Herculex XTRA products.

How it works
The Agrisure RW trait uses a new mode of action for controlling corn rootworm. Agrisure RW is a modified synthetic (mCry3Aa) gene from Bacillus thuringiensis (Bt) for control of northern, western and Mexican corn rootworms. Agrisure RW provides control over newly hatched rootworms through the first larval instar as they begin to feed on corn roots. The larvae are affected as soon as they consume the unique Bt protein in the roots. The Bt protein works in the stomach of the rootworms to eliminate the pest.

Testing by Syngenta and nine Midwestern universities has shown that Agrisure RW has resulted in up to a 32-bushel-per-acre yield advantage over untreated rootworm-infested trials. Syngenta studies also show no yield drag when compared to the hybrid isoline.

"Syngenta maintains the yield performance of the hybrid by integrating trait genes such as Agrisure RW directly into elite lines," says Steve Knodle, marketing manager, Agrisure traits. "The result is a rapid, efficient transfer of just the desired DNA into new hybrids. For Agrisure RW, this means outstanding control of rootworms without compromising the performance of the corn hybrid."

Syngenta introduced Agrisure biotech traits for corn globally in 2005 with the introduction of Agrisure GT. The Agrisure traits lineup now includes Agrisure GT, Agrisure LL (Liberty Link), Agrisure CB/LL (season-long corn borer control with Liberty herbicide tolerance), Agrisure GT/CB/LL, Agrisure RW and Agrisure GT/RW.

Agrisure RW and Agrisure GT/RW will be available for the 2007 planting season. Syngenta expects to receive regulatory approval for Agrisure CB/LL/RW in the next few months and approval for its quad stack -- Agrisure GT/CB/LL/RW -- for availability in the 2008 planting season.

Corn growers will have another rootworm trait to choose from in corn hybrids for 2007. The Environmental Protection Agency (EPA) has granted registration approval for Agrisure RW, a new corn trait developed by Syngenta that controls corn rootworm. Agrisure RW will be available individually and in stacks with Agrisure GT (glyphosate tolerance) in hybrids from NK Brand, Garst, Golden Harvest, and other seed brands for the 2007 planting season.

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