Protect corn yields with a zero tolerance approach to weed control

RESEARCH TRIANGLE PARK, N.C., Aug. 28, 2018 /PRNewswire/ -- As cousins in the pigweed family, Palmer amaranth and waterhemp are aggressive, invasive weeds and a threat to corn yields throughout the Midwest. Palmer amaranth can produce up to half a million seeds without competitionⁱ. In ideal conditions, a waterhemp plant can produce up to a million seedsⁱⁱ. Mark Waddington, selective corn herbicides product development manager at Bayer, said that if not controlled, these weeds can lead to long term management problems.

"Anything less than 100 percent control of prolific seed producers like Palmer amaranth and waterhemp opens the door to thousands, if not millions, of weeds in future seasons," said Waddington. "As more seeds are added to the weed seed bank, weed control will become increasingly difficult. Additionally, it is vital to eliminate resistant weeds like Palmer amaranth and waterhemp in fields to help prevent the spread of weed resistance." 

Waddington noted that Palmer amaranth and waterhemp both produce tiny and easily escapable seeds. They transfer through wind, weather, manure and animals, as well as in machinery. Millions of seeds mean that in just one season, these weeds can develop into a major long-term problem for growers.

Palmer amaranth, which has been documented in 28 states, is the more destructive of the two weeds; it has a reported yield loss in corn of up to 91 percentⁱⁱⁱ. Waterhemp has spread to 40 states, and a reported corn yield loss of up to 15 percent^iv.

"Growers should take a holistic approach to managing Palmer amaranth and waterhemp," said Frank Rittemann, selective corn herbicides product manager at Bayer. "This includes crop rotation, tillage and cover crops, as well as monitoring ditches and borders. Growers should use pre- and post-emergent herbicides with multiple sites of action that are effective on problem weeds like Palmer amaranth and waterhemp."

Rittemann recommends using Corvus^® pre-emergence herbicide and DiFlexx^® DUO postemergence herbicide for season-long control of Palmer amaranth, waterhemp and other resistant weeds like ragweed or marestail.

"Corvus followed by DiFlexx DUO provides a zero tolerance approach to weed management," said Rittemann. "We recommend tank mixing Corvus with atrazine and DiFlexx DUO with glyphosate. Used together, this recommended zero-tolerance approach combines multiple effective sites of action and six distinct and powerful active ingredients for season-long control and proactive resistance management."

For more information, talk to your local Bayer representative or retailer, or visit Corvus.us and DiFlexxDUO.us.

Bayer is committed to bringing new technology and solutions for agriculture and non-agricultural uses. For questions concerning the availability and use of products, contact a local Bayer representative, or visit Crop Science, a division of Bayer, online at www.cropscience.bayer.us.

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About Bayer
Bayer is a global enterprise with core competencies in the Life Science fields of health care and agriculture. Its products and services are designed to benefit people and improve their quality of life. At the same time, the Group aims to create value through innovation, growth and high earning power. Bayer is committed to the principles of sustainable development and to its social and ethical responsibilities as a corporate citizen. In fiscal 2017, the Group employed around 99,800 people and had sales of EUR 35.0 billion. Capital expenditures amounted to EUR 2.4 billion, R&D expenses to EUR 4.5 billion. For more information, go to www.bayer.us.

Contact:

Bayer Media Hotline, 1-862-404-5118, or

Josh VanDeWalle
Bayer
Tel: (712) 363-0900
Email: [email protected]

Sara McClendon
Rhea + Kaiser
Tel: (630) 955-2522
Email: [email protected] 
Find more information at www.cropscience.bayer.us. 

Forward-Looking Statements
This release may contain forward-looking statements based on current assumptions and forecasts made by Bayer management. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here. These factors include those discussed in Bayer's public reports which are available on the Bayer website at www.bayer.com. The company assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.

© 2018 Bayer CropScience LP, 800 North Lindbergh Blvd., St. Louis, MO 63167. Always read and follow label instructions. Bayer, the Bayer Cross, Corvus and DiFlexx are registered trademarks of Bayer. Atrazine and Corvus are Restricted Use Pesticides. Not all products are registered in all states. For additional product information, call toll-free 1-866-99-BAYER (1-866-992-2937) or visit our website at www.cropscience.bayer.us.

Work Cited
ⁱ Legleiter, Travis and Johnson, Bill. "Palmer Amaranth Biology, Identification, and Management." Purdue Extension. https://www.extension.purdue.edu/extmedia/ws/ws-51-w.pdf 
ⁱⁱ Bradley, K., Smeda, R., Massey, R. "Management of Glyphosate-Resistant Waterhemp in Corn and Soybean." University of Missouri Extension https://weedscience.missouri.edu/publications/ipm1030.pdf 
ⁱⁱⁱ Legleiter, Travis and Johnson, Bill. "Palmer Amaranth Biology, Identification, and Management." Purdue Extension. https://www.extension.purdue.edu/extmedia/ws/ws-51-w.pdf 
^iv Nordby, D., Hartzler, B. and Bradley, K. "Biology and Management of Waterhemp." Purdue Extension. https://www.researchgate.net/publication/242761359_Biology_and_Management_of_Waterhemp

SOURCE Bayer

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