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

2. Fertilizer Influence on Grass Weeds Dan Ball Oregon State University Pendleton, OR http://lincoln-adams.wsu.edu agriculture

3. N and Maverick® effects on no-till winter wheat & downy brome Ball et al. http://lincoln-adams.wsu.edu agriculture

4. HERBICIDES: Management Strategies for a Downy Brome Infestation A good competitive crop improves herbicide efficacy Fall vs. Spring Weather …moisture & temp Site of Action …Herbicide resistance mgt Plant back restrictions http://lincoln-adams.wsu.edu agriculture

5. Average Downy Brome Control in Winter Wheat TreatmentTiming Number of trials Average % ControlLowHigh BeyondFall5877399 MaverickFall17867699 OlympusFall14764397 Maverick + SencorFall88974100 Olympus + SencorFall98980100 BeyondSpring6856997 MaverickSpring18661892 OlympusSpring15701892 Maverick + SencorSpring10812993 Olympus + SencorSpring12844496 http://lincoln-adams.wsu.edu agriculture Yenish, et al.

6. Average Downy Brome Control in Winter Wheat TreatmentTiming Number of trials Average % ControlLowHigh Olympus FlexSpring3868492 OspreySpring2653991 pyroxsulamSpring187-- http://lincoln-adams.wsu.edu agriculture Yenish, et al.

7. HERBICIDES: Management Strategies for a Downy Brome Infestation Trade NameHerbicide Group, Site of Action Maverick2 Acetolactate synthase (ALS) inhibitors Olympus2 Acetolactate synthase (ALS) inhibitors Olympus Flex2 Acetolactate synthase (ALS) inhibitors Osprey2 Acetolactate synthase (ALS) inhibitors Beyond2 Acetolactate synthase (ALS) inhibitors Fargo8 Lipid synthesis inhibitors Sencor5 Photosystem II inhibitors Lexone5 Photosystem II inhibitors Assure II1 Acetyl CoA carboxylase (ACCase) inhibitors Roundup9 EPSP synthase inhibitors Source: PNW 437, Herbicide-Resistant Weeds and Their Management Herbicide-Resistant Weed Mgt http://lincoln-adams.wsu.edu agriculture

8. PowerFlex 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 http://lincoln-adams.wsu.edu agriculture

9. PowerFlex 2.75 oz PowerFlex 3.5 oz COC 2,4-D Ester Ally Maverick Olympus Osprey Osprey + COC Finesse Control of Brome with PowerFlex Applied April 5, 2007 Steve Wellsandt, Ritzville http://lincoln-adams.wsu.edu agriculture

10. Plant back restrictions prevention crop rotation HERBICIDES: Management Strategies for a Downy Brome Infestation http://lincoln-adams.wsu.edu agriculture

11. HERBICIDES: Management Strategies for a Downy Brome Infestation Trade NameWheatBarleyPeaCanola ------------------------------------------ Months ------------------------------------------ Maverick 022-bioassay17-2222-bioassay Olympus 018 (24” prec.) 12 (24” prec.) 22 (24” prec.) Olympus Flex 012 (18” prec.) 22 (24” prec.) Osprey 0.251310 Beyond 39-18026 Fargo 0000 Sencor 44812 Lexone 44812 Assure II 4400 Roundup 0000 Source: PNW 571, Plantback restrictions for herbicides used in the dryland wheat production areas of the Pacific Northwest. Plant Back Restriction http://lincoln-adams.wsu.edu agriculture

12. PowerFlex Rotational CropsRotational Interval Months Wheat, triticale0 Alfalfa, barley, canola, chickpeas, dry bean, flax, field corn, field pea, lentil, millet, mustard, oats, potato, safflower, grain sorghum, millet, oats, sugar beet, and sunflower. 9 All other crops (bioassay recommended)12 http://lincoln-adams.wsu.edu agriculture