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Four tips to remember about Agrisure RW hybrids

Agriculture.com Staff 05/22/2007 @ 10:26am

Wondering how you're going to keep any Agrisure RW hybrids you have planted separate from neighboring hybrids?

Iowa State University (ISU) researchers and Extension agronomists have developed some tips to keep Agrisure RW hybrids separate. They include: Roger Elmore, ISU Extension agronomist; Lori Abendroth, ISU research and Extension agronomy specialist; Mark Westgate, ISU corn and soybean physiologist; and Charles Hurburgh, ISU Extension agricultural engineer and professor-in-charge of the Iowa Grain Quality Initiative Management Team.

Here are four tips the ISU specialists give:

  1. Arrange a market for the grain.
    Some feed mills and ethanol plants may accept transgenic hybrids with this trait, others may not. Feeding the grain to livestock on site, or selling it to livestock feeders may be the best options. Tell the buyer when you are delivering Agrisure RW corn. In addition to confirming that the buyer will accept it, this can lessen your potential liability should problems arise.
  2. Keep accurate records.
    Record where you plant the corn and where you store it. The ISU specialists recommend entering GPS coordinates for the perimeter of each field containing the Agrisure RW hybrid. Without this information, the chances of remembering which field or bin contains the Agrisure RW grain, and then actually delivering this grain to the appropriate markets are greatly reduced. There is little chance to recover if the Agrisure RW grain is mixed with other approved traits. If this happens, many more bushels will be involved.
  3. Check with your ethanol plant or processor before delivering Agrisure RW grain.
    The grain to ethanol process concentrates protein, mycotoxins, etc., in the distillers dried grains (DDGS) with solubles (DDGS) fraction. Thus, ethanol plants that export DDGS may not accept transgenic hybrids with the MIR 604 trait.
  4. Be aware of outcrossing.
    This can occur between corn plants in neighboring fields due to windblown pollen. This is especially important for corn destined for markets that have zero tolerance for the MIR 604 gene contained in Agrisure RW hybrids.

The researchers cite a 2007 Ph.D. dissertation by Juan Astini, an Iowa State University graduate student. It documents outcrossing between two adjacent corn fields flowering at the same time. Outcrossing was measured in three situations: a seed corn production field and two for grain production.

Outcrossing decreased rapidly as distance from the field edge increased. However, 0.5% of the grain harvested approximately 115 feet into the field contained genes delivered by pollen from the neighboring field. At a distance between zero and 115 feet, the amount of outcrossing exceeded 0.5%. Outcrossing dipped below 0.5% at distances exceeded 115 feet.

More on the Agrisure RW situation:

Wondering how you're going to keep any Agrisure RW hybrids you have planted separate from neighboring hybrids?

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