DECATUR, Ill. (DTN) -- New three-trait-pyramided technologies aimed specifically at controlling above-ground pests are headed to the cornfield. The products will give more options to growers that need to control lepidopteran pests, but don't need rootworm protection.
Foliar feeding, stalk boring and ear feeding corn pests are the target of DuPont Pioneer's new Optimum Leptra. Ryan French, senior marketing manager-technology launch, said the broad-spectrum protection against above-ground pests comes with multiple modes of action for enhanced trait durability.
Optimum Leptra combines Optimum Intrasect (Herculex I (Cry1F) + YieldGard Corn Borer (Cry1Ab)) with Agrisure Viptera (Vip3A). The corn hybrids will also contain glyphosate and glufosinate tolerance. Pioneer is expected to have six new Optimum Leptra hybrids available in limited volumes for the 2014 planting season. The products will be targeted in the southern U.S. growing areas and range from 113 to 118 relative maturity.
"The product has utility in areas that struggle with lepidopteron pests such as Eastern corn borer, Southwestern corn borer, corn earworm and fall armyworm," French told DTN. The multiple modes of action allow for structured refuges of 5% in the Corn Belt and 20% in the Cotton Belt."
Dow AgroSciences has received registration from the U.S. Environmental Protection Agency (EPA) for Powercore.
Powercore is a combination of three proteins: Cry1A105, Cry1Ab and Cry1F. The multiple-trait product will target European corn borer, southwestern corn borer, corn earworm and fall armyworm. Powercore is SmartStax without the corn rootworm traits. Anticipated launch for the above-ground triple is the 2015 growing season, pending additional regulatory approvals.
It will be offered as a 5% refuge-in-the-bag product in the Corn Belt. The refuge requirement in cotton states will be 20%. Dow previously launched Powercore in Brazil and Argentina in 2012.
Syngenta has added true armyworm to the list of above-ground pests controlled by Agrisure Viptera 3110. Although this trait stack has been on the market for several years, Syngenta had to resubmit for EPA approval to have this pest added to the list of insects controlled.
According to Syngenta sources, it is the only trait stack to control true armyworm -- a voracious pest that can devour plants to the ground. Cool, wet springs encourage their outbreaks.
"True armyworm outbreaks typically offer a very small window to react," said Miloud Araba, technical traits lead for Syngenta. "With true armyworm control built into the Agrisure Viptera 3110 trait stack, growers can avoid being blindsided by an infestation."
The two-trait stack delivers broad-spectrum control of above-ground lepidopteran insects and can be part of an effective insect management strategy for growers who do not need to manage for corn rootworm. The proteins included in this trait stack include Cry1Ab and Vip3A. VIP proteins differ from Bt Cry proteins in the way they bind to different receptors within an insect's mid-gut membrane.
Pamela Smith can be reached at Pamela.email@example.com
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