Control of Downy brome in grass grown for seed
-
Upload
samantha-golden -
Category
Documents
-
view
34 -
download
0
description
Transcript of Control of Downy brome in grass grown for seed
![Page 1: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/1.jpg)
Control of Downy bromein grass grown for seed
Daniel A. Ball, CBARC
Sandra M. Frost
![Page 2: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/2.jpg)
Bromus tectorum L.
Mediterranean
Aggressive winter annual weed
Spring forage
Problem in winter wheat and perennial grass
![Page 3: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/3.jpg)
Bromus tectorum L.
• Fine hairs on leaves
• Panicle dense, slender
• Seeds narrow with awns
![Page 4: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/4.jpg)
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
![Page 5: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/5.jpg)
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
![Page 6: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/6.jpg)
Cultural control
• Crop rotation
• Moldboard plow
• Tillage before seed emergence– 1800 GDD, base 32F
• Pre-plant control– Tillage– Herbicides – Roundup
![Page 7: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/7.jpg)
CRP tolerance trial
• Established stand seeded 9/2000
• PRE applications 9/2001
![Page 8: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/8.jpg)
Herbicides
Herbicide Timing Weeds
Prowl PRE Foxtails
Outlook PRE Foxtails + Downy brome
Dual Magnum PRE Suppresses Downy brome
Axiom PRE Foxtails
Sencor 75DF PRE Suppresses Downy brome
Prowl + Outlook PRE Downy brome
Plateau + MSO POST Downy brome
![Page 9: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/9.jpg)
Timothy tolerance
Timothy
Treatment Prod/A 10/2/01 4/19/02 5/22/02
----------------% injury--------------------
Prowl 5 pt 3 1 1
Outlook 1 pt 11 3 14
Dual Magnum 1 pt 4 1 3
Axiom 9 oz 54 15 3
Sencor 75DF 5 oz 78 53 25
Prowl + Outlook 5 pt + 1 pt 20 3 4
LSD (0.05) 19 15 18
![Page 10: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/10.jpg)
Thickspike wg tolerance
Thickspike wheatgrass
Treatment Prod/A 10/2/01 4/19/02 5/22/02
----------------% injury--------------------
Prowl 5 pt 3 0 0
Outlook 1 pt 8 1 0
Dual Magnum 1 pt 3 3 0
Axiom 9 oz 43 9 3
Sencor 75DF 5 oz 40 5 0
Prowl + Outlook 5 pt + 1 pt 13 5 8
LSD (0.05) 17 7 8
![Page 11: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/11.jpg)
Bluebunch tolerance
Bluebunch wheatgrass
Treatment Prod/A 10/2/01 4/19/02 5/22/02
----------------% injury--------------------
Prowl 5 pt 1 1 0
Outlook 1 pt 1 1 0
Dual Magnum 1 pt 0 1 0
Axiom 9 oz 24 5 0
Sencor 75DF 5 oz 38 4 0
Prowl + Outlook 5 pt + 1 pt 6 0 0
LSD (0.05) 10 5 0
![Page 12: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/12.jpg)
Sandberg tolerance
Sandberg bluegrass
Treatment Prod/A 10/2/01 4/19/02 5/22/02
----------------% injury--------------------
Prowl 5 pt 0 3 0
Outlook 1 pt 4 0 0
Dual Magnum 1 pt 3 0 0
Axiom 9 oz 8 0 0
Sencor 75DF 5 oz 20 0 0
Prowl + Outlook 5 pt + 1 pt 4 0 0
LSD (0.05) 6 3 0
![Page 13: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/13.jpg)
Big bluegrass tolerance
Big bluegrass
Treatment Prod/A 10/2/01 4/19/02 5/22/02
----------------% injury--------------------
Prowl 5 pt 1 0 0
Outlook 1 pt 5 0 0
Dual Magnum 1 pt 1 3 0
Axiom 9 oz 23 4 0
Sencor 75DF 5 oz 54 1 0
Prowl + Outlook 5 pt + 1 pt 6 0 0
LSD (0.05) 13 5 0
![Page 14: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/14.jpg)
Sheep fescue tolerance
Sheep fescue
Treatment Prod/A 10/2/01 4/19/02 5/22/02
----------------% injury--------------------
Prowl 5 pt 1 1 0
Outlook 1 pt 18 1 5
Dual Magnum 1 pt 14 1 11
Axiom 9 oz 83 1 31
Sencor 75DF 5 oz 93 4 0
Prowl + Outlook 5 pt + 1 pt 20 5 14
LSD (0.05) 12 6 10
![Page 15: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/15.jpg)
CRP tolerance trial
• Established stand seeded 2000
• Applications made– PRE 9/2001– POST 11/2001
![Page 16: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/16.jpg)
Timothy tolerance
Timothy
Treatment Prod/A Timing 10/2/01 4/19/02 5/22/02
-----------% injury---------------
Prowl 5 pt PRE 1 1 15
Outlook 1 pt PRE 10 0 15
Dual Magnum 1 pt PRE 4 0 5
Axiom 9 oz PRE 40 3 4
Sencor 75DF 5 oz PRE 65 13 24
Prowl + Outlook 5 pt + 1 pt PRE 9 1 9
Plateau + MSO 4 oz + 1.5 pt POST 0 80 60
LSD (0.05) 15 11 23
![Page 17: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/17.jpg)
Bluebunch wheatgrass
Bluebunch wheatgrass
Treatment Prod/A Timing 10/2/01 4/19/02 5/22/02
-----------% injury---------------
Prowl 5 pt PRE 1 1 0
Outlook 1 pt PRE 4 0 0
Dual Magnum 1 pt PRE 3 1 0
Axiom 9 oz PRE 18 3 0
Sencor 75DF 5 oz PRE 40 1 0
Prowl + Outlook 5 pt + 1 pt PRE 4 0 0
Plateau + MSO 4 oz + 1.5 pt POST 0 8 0
LSD (0.05) 10 4 0
![Page 18: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/18.jpg)
Sandberg bluegrass
Sandberg bluegrass
Treatment Prod/A Timing 10/2/01 4/19/02 5/22/02
----------------% injury--------------------
Prowl 5 pt PRE 3 0 NA
Outlook 1 pt PRE 2 0 NA
Dual Magnum 1 pt PRE 1 0 NA
Axiom 9 oz PRE 14 0 NA
Sencor 75DF 5 oz PRE 23 0 NA
Prowl + Outlook 5 pt + 1 pt PRE 4 0 NA
Plateau + MSO 4 oz + 1.5 pt POST 0 3 NA
LSD (0.05) 6 3 NA
![Page 19: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/19.jpg)
Big bluegrassBig bluegrass
Treatment Prod/A Timing 10/2/01 4/19/02 5/22/02
----------------% injury--------------------
Prowl 5 pt PRE 5 0 0
Outlook 1 pt PRE 9 3 0
Dual Magnum 1 pt PRE 3 0 4
Axiom 9 oz PRE 23 0 3
Sencor 75DF 5 oz PRE 59 0 0
Prowl + Outlook 5 pt + 1 pt PRE 6 0 0
Plateau + MSO 4 oz + 1.5 pt POST 0 13 0
LSD (0.05) 12 4 5
![Page 20: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/20.jpg)
Perennial ryegrass
Perennial ryegrass
Treatment Prod/A Timing 10/2/01 4/19/02 5/22/02
----------------% injury--------------------
Prowl 5 pt PRE 3 0 0
Outlook 1 pt PRE 9 1 0
Dual Magnum 1 pt PRE 1 0 0
Axiom 9 oz PRE 10 0 0
Sencor 75DF 5 oz PRE 18 1 0
Prowl + Outlook 5 pt + 1 pt PRE 9 0 0
Plateau + MSO 4 oz + 1.5 pt POST 0 74 74
LSD (0.05) 8 12 10
![Page 21: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/21.jpg)
Chewings fescue
Chewings fescue
Treatment Prod/A Timing 10/2/01 4/19/02 5/22/02
-----------% injury---------------
Prowl 5 pt PRE 1 0 3
Outlook 1 pt PRE 5 1 0
Dual Magnum 1 pt PRE 1 0 0
Axiom 9 oz PRE 14 1 4
Sencor 75DF 5 oz PRE 69 5 19
Prowl + Outlook 5 pt + 1 pt PRE 8 3 3
Plateau + MSO 4 oz + 1.5 pt POST 0 38 29
LSD (0.05) 11 9 22
![Page 22: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/22.jpg)
Tall fescue
Tall fescue
Treatment Prod/A Timing 10/2/01 4/19/02 5/22/02
-----------% injury---------------
Prowl 5 pt PRE 3 0 0
Outlook 1 pt PRE 14 0 1
Dual Magnum 1 pt PRE 6 0 0
Axiom 9 oz PRE 18 0 5
Sencor 75DF 5 oz PRE 29 0 1
Prowl + Outlook 5 pt + 1 pt PRE 13 0 0
Plateau + MSO 4 oz + 1.5 pt POST 0 80 93
LSD (0.05) 12 2 5
![Page 23: Control of Downy brome in grass grown for seed](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812eb0550346895d94541b/html5/thumbnails/23.jpg)
Kentucky bluegrass
Kentucky bluegrass
Treatment Prod/A Timing 10/2/01 4/19/02 5/22/02
----------------% injury--------------------
Prowl 5 pt PRE 3 3 3
Outlook 1 pt PRE 8 3 28
Dual magnum 1 pt PRE 3 1 34
Axiom 9 oz PRE 48 0 25
Sencor 75DF 5 oz PRE 65 1 25
Prowl + Outlook 5 pt + 1 pt PRE 9 1 33
Plateau + MSO 4 oz + 1.5 pt POST 0 8 14
LSD (0.05) 15 6 33