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Since the introduction of Roundup Ready Soybeans, Monsanto recommendations have emphasized starting clean with a weed-free field followed by timely, post-emergence in-crop applications of Roundup® agricultural herbicide. This approach proves the best opportunity for maximum weed control and yield potential in Roundup Ready Soybeans, and reduces the potential for weed escapes that require additional management:
- Scout fields before and after herbicide application.
- Always start with a weed-free field using a burndown herbicide and/or tillage. In no-till, tank-mix with 2, 4-D to control glyphosate-resistant Marestail or other tough-to-control broad leaf weeds.
- If you have dense stands of weeds such as Waterhemp, Common Lambsquarters, Palmer Amaranth or Common Ragweed use a residual herbicide such as Intrro® or Valor®. A residual herbicide would also be used in a continuous Roundup Ready Soybean System.
- In-crop, apply Roundup WeatherMAX® or Roundup OriginalMax® at a minimum of 22 oz/A before weeds exceed 8 inches.
- If an additional flush of weeds occur, a sequential application of Roundup WeatherMAX at maximum label rate for the target weeds may be needed.
- Tank-mix other herbicide with Roundup WeatherMAX or Roundup OriginalMax if necessary for post-emergence weed control.
- Roundup agricultural herbicide may be applied from emergence through flowering (R2 stage soybeans). R2 soybeans ends at R3 stage when a pod 5 millimeters (3/16 inch) long appears at one of the four uppermost nodes on the main stem with a fully developed leaf.
For more information call 1-800-Roundup or visit www.weedresistancemanagement.com
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