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Control of Downy brome in grass grown for seed Daniel A. Ball, CBARC Sandra M. Frost.

Published byLetitia Gordon Modified over 8 years ago

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Presentation on theme: "Control of Downy brome in grass grown for seed Daniel A. Ball, CBARC Sandra M. Frost."— Presentation transcript:

1 Control of Downy brome in grass grown for seed Daniel A. Ball, CBARC Sandra M. Frost

2 Bromus tectorum L. Mediterranean Aggressive winter annual weed Spring forage Problem in winter wheat and perennial grass

3 Bromus tectorum L. Fine hairs on leaves Panicle dense, slender Seeds narrow with awns

4 Bromus tectorum L. Annual precip 6 to 22 inches Many soil conditions and habitat types Seed germinates late summer Seed mature after 1800 GDD (base 32F) Seeds viable in soil 2 to 3 years

5 Labeled for Downy brome Outlook (6EC) at 14 to 21 oz product / A –Dimethenamid Sencor 75DF at 0.5 lb/A (75W) –metribuzin On established, dormant grasses

6 Cultural control Crop rotation Moldboard plow Tillage before seed emergence –1800 GDD, base 32F Pre-plant control –Tillage –Herbicides – Roundup

7 CRP tolerance trial Established stand seeded 9/2000 PRE applications 9/2001

8 Herbicides HerbicideTimingWeeds ProwlPREFoxtails OutlookPREFoxtails + Downy brome Dual MagnumPRESuppresses Downy brome AxiomPREFoxtails Sencor 75DFPRESuppresses Downy brome Prowl + OutlookPREDowny brome Plateau + MSOPOSTDowny brome

9 Timothy tolerance Timothy TreatmentProd/A10/2/014/19/025/22/02 ----------------% injury-------------------- Prowl5 pt311 Outlook1 pt11314 Dual Magnum1 pt413 Axiom9 oz54153 Sencor 75DF5 oz785325 Prowl + Outlook5 pt + 1 pt2034 LSD (0.05)191518

10 Thickspike wg tolerance Thickspike wheatgrass TreatmentProd/A10/2/014/19/025/22/02 ----------------% injury-------------------- Prowl5 pt 300 Outlook1 pt 810 Dual Magnum1 pt 330 Axiom9 oz 4393 Sencor 75DF5 oz 4050 Prowl + Outlook5 pt + 1 pt 1358 LSD (0.05) 1778

11 Bluebunch tolerance Bluebunch wheatgrass TreatmentProd/A10/2/014/19/025/22/02 ----------------% injury-------------------- Prowl5 pt 110 Outlook1 pt 110 Dual Magnum1 pt 010 Axiom9 oz 2450 Sencor 75DF5 oz 3840 Prowl + Outlook5 pt + 1 pt 600 LSD (0.05) 1050

12 Sandberg tolerance Sandberg bluegrass TreatmentProd/A10/2/014/19/025/22/02 ----------------% injury-------------------- Prowl5 pt 030 Outlook1 pt 400 Dual Magnum1 pt 300 Axiom9 oz 800 Sencor 75DF5 oz 2000 Prowl + Outlook5 pt + 1 pt 400 LSD (0.05) 630

13 Big bluegrass tolerance Big bluegrass TreatmentProd/A10/2/014/19/025/22/02 ----------------% injury-------------------- Prowl5 pt 100 Outlook1 pt 500 Dual Magnum1 pt 130 Axiom9 oz 2340 Sencor 75DF5 oz 5410 Prowl + Outlook5 pt + 1 pt 600 LSD (0.05) 1350

14 Sheep fescue tolerance Sheep fescue TreatmentProd/A10/2/014/19/025/22/02 ----------------% injury-------------------- Prowl5 pt 110 Outlook1 pt 1815 Dual Magnum1 pt 14111 Axiom9 oz 83131 Sencor 75DF5 oz 9340 Prowl + Outlook5 pt + 1 pt 20514 LSD (0.05) 12610

15 CRP tolerance trial Established stand seeded 2000 Applications made –PRE 9/2001 –POST 11/2001

16 Timothy tolerance Timothy TreatmentProd/ATiming10/2/014/19/025/22/02 -----------% injury--------------- Prowl5 ptPRE1115 Outlook1 ptPRE10015 Dual Magnum1 ptPRE405 Axiom9 ozPRE4034 Sencor 75DF5 ozPRE651324 Prowl + Outlook5 pt + 1 ptPRE919 Plateau + MSO4 oz + 1.5 ptPOST08060 LSD (0.05)151123

17 Bluebunch wheatgrass TreatmentProd/ATiming10/2/014/19/025/22/02 -----------% injury--------------- Prowl5 ptPRE 110 Outlook1 ptPRE 400 Dual Magnum1 ptPRE 310 Axiom9 ozPRE 1830 Sencor 75DF5 ozPRE 4010 Prowl + Outlook5 pt + 1 ptPRE 400 Plateau + MSO4 oz + 1.5 ptPOST 080 LSD (0.05) 1040

18 Sandberg bluegrass TreatmentProd/ATiming10/2/014/19/025/22/02 ----------------% injury-------------------- Prowl5 ptPRE 30NA Outlook1 ptPRE 20NA Dual Magnum1 ptPRE 10NA Axiom9 ozPRE 140NA Sencor 75DF5 ozPRE 230NA Prowl + Outlook5 pt + 1 ptPRE 40NA Plateau + MSO4 oz + 1.5 ptPOST 03NA LSD (0.05) 63NA

19 Big bluegrass TreatmentProd/ATiming10/2/014/19/025/22/02 ----------------% injury-------------------- Prowl5 ptPRE500 Outlook1 ptPRE930 Dual Magnum1 ptPRE304 Axiom9 ozPRE2303 Sencor 75DF5 ozPRE5900 Prowl + Outlook5 pt + 1 ptPRE600 Plateau + MSO4 oz + 1.5 ptPOST0130 LSD (0.05)1245

20 Perennial ryegrass TreatmentProd/ATiming10/2/014/19/025/22/02 ----------------% injury-------------------- Prowl5 ptPRE 300 Outlook1 ptPRE 910 Dual Magnum1 ptPRE 100 Axiom9 ozPRE 1000 Sencor 75DF5 ozPRE 1810 Prowl + Outlook5 pt + 1 ptPRE 900 Plateau + MSO4 oz + 1.5 ptPOST 074 LSD (0.05) 81210

21 Chewings fescue TreatmentProd/ATiming10/2/014/19/025/22/02 -----------% injury--------------- Prowl5 ptPRE 103 Outlook1 ptPRE 510 Dual Magnum1 ptPRE 100 Axiom9 ozPRE 1414 Sencor 75DF5 ozPRE 69519 Prowl + Outlook5 pt + 1 ptPRE 833 Plateau + MSO4 oz + 1.5 ptPOST 03829 LSD (0.05) 11922

22 Tall fescue TreatmentProd/ATiming10/2/014/19/025/22/02 -----------% injury--------------- Prowl5 ptPRE 300 Outlook1 ptPRE 1401 Dual Magnum1 ptPRE 600 Axiom9 ozPRE 1805 Sencor 75DF5 ozPRE 2901 Prowl + Outlook5 pt + 1 ptPRE 1300 Plateau + MSO4 oz + 1.5 ptPOST 08093 LSD (0.05) 1225

23 Kentucky bluegrass TreatmentProd/ATiming10/2/014/19/025/22/02 ----------------% injury-------------------- Prowl5 ptPRE 333 Outlook1 ptPRE 8328 Dual magnum1 ptPRE 3134 Axiom9 ozPRE 48025 Sencor 75DF5 ozPRE 65125 Prowl + Outlook5 pt + 1 ptPRE 9133 Plateau + MSO4 oz + 1.5 ptPOST 0814 LSD (0.05) 15633

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