A good competitive crop is your best herbicide

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FERTILIZER Management Strategies for a Downy
Brome Infestation
http//lincoln-adams.wsu.edu agriculture

• A good competitive crop is your best herbicide
• Soil sample and apply only what is needed
• Deep band fertilizer early in fallow period
  rather than near planting
• Do not spring top dress N fertilization
• Little benefit for winter wheat and increases
  downy brome seed production and water use
• Adequate P levels
• Deep band or starter placement

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Fertilizer Influence on Grass Weeds
http//lincoln-adams.wsu.edu agriculture

• Dan Ball
• Oregon State University
• Pendleton, OR

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N and Maverick effects on no-till winter wheat
downy brome
http//lincoln-adams.wsu.edu agriculture
Ball et al.
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HERBICIDES Management Strategies for a Downy
Brome Infestation
http//lincoln-adams.wsu.edu agriculture

• A good competitive crop improves herbicide
  efficacy
• Fall vs. Spring
• Weathermoisture temp
• Site of ActionHerbicide resistance mgt
• Plant back restrictions

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Average Downy Brome Control in Winter Wheat
http//lincoln-adams.wsu.edu agriculture
Yenish, et al.
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Average Downy Brome Control in Winter Wheat
http//lincoln-adams.wsu.edu agriculture
Yenish, et al.
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HERBICIDES Management Strategies for a Downy
Brome Infestation
http//lincoln-adams.wsu.edu agriculture
Herbicide-Resistant Weed Mgt
Source PNW 437, Herbicide-Resistant Weeds and
Their Management
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PowerFlex
http//lincoln-adams.wsu.edu agriculture

• Dow AgroSciences
• Anticipated Registration by Summer
• Pyroxsulam
• Group 2 HRAC B
• Grass and some broadleaf weed control in wheat
• Wheat in rotation with canola, corn, fallow,
  flax, sorghum, grasses, or mustard

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http//lincoln-adams.wsu.edu agriculture
Control of Brome with PowerFlex
COC
2,4-D Ester
Ally
PowerFlex 2.75 oz
Maverick
Finesse
Osprey
Osprey COC
Olympus
PowerFlex 3.5 oz
Applied April 5, 2007 Steve Wellsandt, Ritzville
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HERBICIDES Management Strategies for a Downy
Brome Infestation
http//lincoln-adams.wsu.edu agriculture

• Plant back restrictions prevention crop rotation

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HERBICIDES Management Strategies for a Downy
Brome Infestation
http//lincoln-adams.wsu.edu agriculture
Plant Back Restriction
Source PNW 571, Plantback restrictions for
herbicides used in the dryland wheat production
areas of the Pacific Northwest.
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PowerFlex
http//lincoln-adams.wsu.edu agriculture