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First hollow stem update 03/04/2016

First hollow stem is the optimal time to remove cattle from wheat pasture (full explanation). This will be the last of the 2016 first hollow stem updates, as the vast majority of varieties are at or well past first hollow stem.

Keep in mind that the numbers reported from Stillwater are likely behind those being observed in southern Oklahoma and ahead of those observed in northern Oklahoma. The First Hollow Stem Advisor can provide an estimate of first hollow stem progress in your neck of the woods.

First hollow stem measured in wheat sown 09/15/2015 at Stillwater, OK. Varieties with ‘-‘ reached first hollow stem on a previous measurement date
Variety cm of hollow stem 03/04/16
Endurance 1.5
OK Rising
Billings
Ruby Lee
Duster
Gallagher
Iba
Bentley
Doublestop CL Plus 1.57
NF 101
WB-Cedar
WB4458
WB-Grainfield
Winterhawk
WB4515
WB4721
WB4303
SY Monument 1.5
SY Flint
SY Llano
SY Drifter
SY Wolf
SY Razor
SY Grit
Everest
1863
KanMark
Oakley CL 1.74
Larry 1.8
Zenda
Tatanka 1.81
Joe 1.1
LCS Pistol 1.68
LCS Wizard 1.43
LCS Mint 2.08
LCS Chrome 1.84
T158 1.5
Long Branch 1.73
TAM 112
TAM 204
TAM 114
AG Robust
Byrd
Brawl CL Plus 1.26
Avery 1.97
OK1059060-3 1.91
OK10126 1.41
OK11D25056 1.55
OK12621 2.18
Stardust 2.24
OK12716R/W 1.16
OK11231 1.26
OK09915C-1 1.32
OK12912C 1.17
OK12DP22002-042
OK118036R/W

First hollow stem update 02/29/2016

First hollow stem is the optimal time to remove cattle from wheat pasture (full explanation). We measure first hollow in our September-sown wheat forage plots at Stillwater each year, and normally have approximately 50% of varieties at or past first hollow stem by March 1st. I have posted first hollow stem measurements from samples taken from these plots on 02/29/16 in a table at the end of this blog. Most wheat varieties are now at or well past first hollow stem.

Keep in mind that the numbers reported from Stillwater are likely behind those being observed in southern Oklahoma and ahead of those observed in northern Oklahoma. The First Hollow Stem Advisor can provide an estimate of first hollow stem progress in your neck of the woods.

First hollow stem measured in wheat sown 09/15/2015 at Stillwater, OK. Varieties with ‘-‘ reached first hollow stem on a previous measurement date
Variety cm of hollow stem 02/29/2016
Endurance 1.0
OK Rising 1.5
Billings
Ruby Lee 2.0
Duster 2.0
Gallagher
Iba
Bentley
Doublestop CL Plus 1.4
NF 101
WB-Cedar
WB4458
WB-Grainfield
Winterhawk
WB4515
WB4721
WB4303
SY Monument 1.0
SY Flint
SY Llano
SY Drifter
SY Wolf 2.7
SY Razor
SY Grit
Everest
1863
KanMark 1.5
Oakley CL 1.3
Larry 0.9
Zenda
Tatanka 1.1
Joe 0.8
LCS Pistol 1.1
LCS Wizard 1.3
LCS Mint 1.4
LCS Chrome 1.2
T158 1.1
Long Branch 1.2
TAM 112 1.6
TAM 204 1.7
TAM 114 1.6
AG Robust
Byrd 1.7
Brawl CL Plus 1.1
Avery 1.1
OK1059060-3 1.4
OK10126 0.8
OK11D25056 1.1
OK12621 1.1
Stardust 1.0
OK12716R/W 1.1
OK11231 1.0
OK09915C-1 0.8
OK12912C 1.1
OK12DP22002-042 1.6
OK118036R/W

First hollow stem update 02/26/2016

First hollow stem is the optimal time to remove cattle from wheat pasture (full explanation). We measure first hollow in our September-sown wheat forage plots at Stillwater each year, and normally have approximately 50% of varieties at or past first hollow stem by March 1st. I have posted first hollow stem measurements from these plots in a table at the end of this blog. WB-Grainfield and AG Robust have reached first hollow stem since our last update.

Keep in mind that the numbers reported from Stillwater are likely behind those being observed in southern Oklahoma and ahead of those observed in northern Oklahoma. The First Hollow Stem Advisor can provide an estimate of first hollow stem progress in your neck of the woods.

First hollow stem measured in wheat sown 09/15/2015 at Stillwater, OK. Varieties with no hollow stem value reached first hollow stem on a previous measurement date
Variety cm of hollow stem 02/26/16
Endurance 0.9
OK Rising 1.3
Billings
Ruby Lee 1.3
Duster 1.2
Gallagher
Iba
Bentley
Doublestop CL Plus 1.3
NF 101
WB-Cedar
WB4458
WB-Grainfield 1.6
Winterhawk
WB4515
WB4721
WB4303
SY Monument 0.9
SY Flint
SY Llano
SY Drifter
SY Wolf 1.1
SY Razor
SY Grit
Everest
1863
KanMark 1.4
Oakley CL 1.3
Larry 0.8
Zenda
Tatanka 1.0
Joe 0.7
LCS Pistol 0.9
LCS Wizard 1.2
LCS Mint 0.9
LCS Chrome 1.0
T158 1.0
Long Branch 1.1
TAM 112 1.2
TAM 204 1.3
TAM 114 1.3
AG Robust 1.6
Byrd 1.2
Brawl CL Plus 0.6
Avery 0.7
OK1059060-3 1.3
OK10126 0.7
OK11D25056 0.8
OK12621 0.8
OK10728W 0.8
OK12716R/W 0.6
OK11231 0.8
OK09915C-1 0.6
OK12912C 1.0
OK12DP22002-042 1.2
OK118036R/W  
Average 1.0

First hollow stem update 02/23/2016

First hollow stem is the optimal time to remove cattle from wheat pasture (full explanation). We measure first hollow in our September-sown wheat forage plots at Stillwater each year, and normally have approximately 50% of varieties at or past first hollow stem by March 1st. I have posted first hollow stem measurements from these plots in a table at the end of this blog. As of Monday the varieties, Billings, Gallagher, Iba, Bentley, NF101, WB-Cedar, WB4458, Winterhawk, WB4515, WB4721, WB4303, SY Flint, Sy Llano, SY Drifter, SY Razor, SY Grit, Everest, and Zenda were all at or past first hollow stem at Stillwater. Please note that WB4515 was incorrectly labeled as WB4455 in the past couple of posts. Also note that experimental line OK0728W has been released as Stardust hard white winter wheat. We will take another set of measurements at the end of this week and report the results on this blog.

Keep in mind that the numbers reported from Stillwater are likely behind those being observed in southern Oklahoma and ahead of those observed in northern Oklahoma. The First Hollow Stem Advisor on the Oklahoma Mesonet can provide an indication of where varieties are regarding first hollow stem in your area.

First hollow stem measured in wheat sown 09/15/2015 at Stillwater, OK.
Variety cm of hollow stem 02/22/2016
Endurance 0.8
OK Rising 1.3
Billings 2.1
Ruby Lee 1.2
Duster 1.1
Gallagher 2.0
Iba 1.9
Bentley 1.8
Doublestop CL Plus 1.2
NF 101 2.5
WB-Cedar 1.5
WB4458 1.9
WB-Grainfield 1.3
Winterhawk 1.5
WB4515 1.6
WB4721 1.5
WB4303 2.1
SY Monument 0.8
SY Flint 1.5
SY Llano 2.8
SY Drifter 1.5
SY Wolf 1.0
SY Razor 2.9
SY Grit 1.7
Everest 1.5
1863 2.1
KanMark 1.4
Oakley CL 1.0
Larry 0.7
Zenda 1.6
Tatanka 0.9
Joe 0.7
LCS Pistol 0.8
LCS Wizard 1.2
LCS Mint 0.8
LCS Chrome 0.8
T158 0.8
Long Branch 1.0
TAM 112 0.9
TAM 204 1.2
TAM 114 0.7
AG Robust 1.0
Byrd 0.6
Brawl CL Plus 0.6
Avery 0.5
OK1059060-3 1.3
OK10126 0.6
OK11D25056 0.6
OK12621 0.7
Stardust 0.7
OK12716R/W 0.5
OK11231 0.6
OK09915C-1 0.5
OK12912C 0.9
OK12DP22002-042 0.9
OK118036R/W 2.0
Average 1.2

 

 

First hollow stem update 02/19/2016

First hollow stem is the optimal time to remove cattle from wheat pasture (full explanation). We measure first hollow in our September-sown wheat forage plots at Stillwater each year, and normally have approximately 50% of varieties at or past first hollow stem by March 1st. I have posted first hollow stem measurements from these plots in a table at the end of this blog. No varieties are currently at first hollow stem at Stillwater, but given the warm conditions and the estimates from the first hollow stem advisor on the Mesonet, I anticipate we will have some varieties past first hollow stem by next week. Note that while no varieties are currently at first hollow stem, the overall average first hollow stem measurement increased as compared to 02/16/15.  Dillon Butchee reported early sown Gallagher in the Altus area was at first hollow stem.

Keep in mind that the numbers reported from Stillwater are likely behind those being observed in southern Oklahoma and ahead of those observed in northern Oklahoma. The First Hollow Stem Advisor on the Oklahoma Mesonet indicates that  early varieties in southern Oklahoma are likely past first hollow stem and that early varieties in central Oklahoma will reach this point within a week. Jim Johnson with the Noble Foundation reported that the estimates on the first hollow stem advisor were matching closely with his observations in the field around the Ardmore area. My advice is to start looking for a home for cattle on wheat pasture.

 

 

First hollow stem measured in wheat sown 09/15/2015 at Stillwater, OK.
Variety cm of hollow stem 02/19/16
Endurance 0.6
OK Rising 0.5
Billings 1.3
Ruby Lee 1.2
Duster 1.1
Gallagher 1.4
Iba 1.1
Bentley 0.7
Doublestop CL Plus 0.6
NF 101 1.1
WB-Cedar 0.7
WB4458 0.8
WB-Grainfield 1.0
Winterhawk 0.9
WB4455 0.6
WB4721 1.3
WB4303 1.2
SY Monument 0.6
SY Flint 1.3
SY Llano 1.0
SY Drifter 0.8
SY Wolf 0.4
SY Razor 1.4
SY Grit 1.3
Everest 0.6
1863 0.9
KanMark 0.7
Oakley CL 0.7
Larry 0.4
Zenda 1.1
Tatanka 0.4
Joe 0.6
LCS Pistol 0.6
LCS Wizard 0.6
LCS Mint 0.7
LCS Chrome 0.6
T158 0.7
Long Branch 0.9
TAM 112 0.7
TAM 204 0.6
TAM 114 0.4
AG Robust 0.7
Byrd 0.6
Brawl CL Plus 0.5
Avery 0.4
OK1059060-3 0.5
OK10126 0.3
OK11D25056 0.5
OK12621 0.4
OK10728W 0.6
OK12716R/W 0.4
OK11231 0.4
OK09915C-1 0.4
OK12912C 0.7
OK12DP22002-042 0.8
OK118036R/W 1.1
Average 0.7

 

First hollow stem update 02/16/2016

First hollow stem is the optimal time to remove cattle from wheat pasture (full explanation). We measure first hollow in our September-sown wheat forage plots at Stillwater each year, and normally have approximately 50% of varieties at or past first hollow stem by March 1st. I have posted first hollow stem measurements from these plots in a table at the end of this blog. No varieties are currently at first hollow stem at Stillwater, but given the warm conditions and the estimates from the first hollow stem advisor on the Mesonet, I anticipate we will have some varieties past first hollow stem by the end of the week. We will take another set of measurements at the end of this week and report the results on this blog.

Keep in mind that the numbers reported from Stillwater are likely behind those being observed in southern Oklahoma and ahead of those observed in northern Oklahoma. The First Hollow Stem Advisor on the Oklahoma Mesonet indicates that  early varieties in southern Oklahoma are likely past first hollow stem and that early varieties in central Oklahoma will reach this point within a week. Jim Johnson with the Noble Foundation reported that the estimates on the first hollow stem advisor were matching closely with his observations in the field around the Ardmore area. My advice is to start looking for a home for cattle on wheat pasture.

Current first hollow stem estimates for early maturity wheat varieties

Current first hollow stem estimates for early maturity wheat varieties

One week projection of first hollow stem for early maturity wheat varieties

One week projection of first hollow stem for early maturity wheat varieties

Two week projection of first hollow stem for early maturity wheat varieties

Two week projection of first hollow stem for early maturity wheat varieties

 

First hollow stem measured in wheat sown 09/15/2015 at Stillwater, OK.
Variety cm of hollow stem 02/15/16
Endurance 0.0
OK Rising 0.1
Billings 0.4
Ruby Lee 0.3
Duster 0.1
Gallagher 0.7
Iba 0.8
Bentley 0.6
Doublestop CL Plus 0.3
NF 101 0.4
WB-Cedar 0.4
WB4458 0.7
WB-Grainfield 0.0
Winterhawk 0.0
WB4455 0.1
WB4721 0.3
WB4303 1.2
SY Monument 0.0
SY Flint 0.7
SY Llano 1.0
SY Drifter 0.1
SY Wolf 0.2
SY Razor 1.4
SY Grit 0.4
Everest 0.2
1863 0.8
KanMark 0.0
Oakley CL 0.2
Larry 0.0
Zenda 0.8
Tatanka 0.0
Joe 0.0
LCS Pistol 0.0
LCS Wizard 0.2
LCS Mint 0.1
LCS Chrome 0.1
T158 0.3
Long Branch 0.2
TAM 112 0.3
TAM 204 0.4
TAM 114 0.0
AG Robust 0.2
Byrd 0.1
Brawl CL Plus 0.1
Avery 0.2
OK1059060-3 0.0
OK10126 0.1
OK11D25056 0.1
OK12621 0.0
OK10728W 0.2
OK12716R/W 0.4
OK11231 0.0
OK09915C-1 0.0
OK12912C 0.4
OK12DP22002-042 0.1
OK118036R/W 0.3
Average 0.3

First hollow stem nearing

First hollow stem occurs just prior to jointing and is the optimal time to remove cattle from wheat pasture. Given the warm forecast for the next two weeks, it is likely that we will start seeing first hollow stem in Oklahoma wheat fields. Grazing past first hollow stem can reduce wheat grain yield by as much as 5% per day and the added cattle gains are not enough to offset the value of the reduced wheat yield.

Similar to previous years, we will monitor occurrence of first hollow stem in our wheat plots at Stillwater and report the findings on this blog. There is also a first hollow stem advisor available on the Oklahoma Mesonet that can assist in determining when to start scouting.

Checking for first hollow stem is fairly easy.

  • You must check first hollow stem in a nongrazed area of the same variety and planting date. Variety can affect date of first hollow stem by as much as three weeks and planting date can affect it even more.
  • Dig or pull up a few plants and split the largest tiller longitudinally (lengthways) and measure the amount of hollow stem present below the developing grain head. You must dig plants because at this stage the developing grain head may still be below the soil surface.
  • If there is 1.5 cm of hollow stem present (see picture below), it is time to remove cattle. 1.5 cm is about the same as the diameter of a dime.
  • Detailed information on first hollow stem can be found at www.wheat.okstate.edu under ‘wheat management’ then ‘grazing’
  • Image

First hollow stem update 03/16/15

First hollow stem is the optimal time to remove cattle from wheat pasture (full explanation). To monitor first hollow stem, we measure hollow stem for the 56 lines in our September-sown wheat forage plots at Stillwater each year. Almost all varieties are well past first hollow stem. Full results are posted in the table below. Varieties with no value for first hollow stem reached first hollow stem on a previous measurement date.

This will be the last first hollow stem update of the 2015 season. You can check progression of first hollow stem around the state by using the First Hollow Stem Advisor on the Oklahoma Mesonet site

First hollow stem measured in wheat sown 09/16/2014 at Stillwater, OK. Varieties with ‘-‘ reached first hollow stem on a previous measurement date
Variety cm of hollow stem 03/16/15
Endurance 0.9
Deliver 1.7
Pete 0.3
OK Rising 1.1
Billings
Ruby Lee 2.1
Garrison 1.9
Duster
Gallagher
Iba
Centerfield 1.0
Doublestop CL Plus 1.5
NF 101
Everest
1863
KanMark 3.0
Oakley CL 2.1
KS061406
Sy Llano
Sy Southwind
Greer
Jackpot
Sy Monument 2.1
06BC722#25
AP09T7631
WB-Cedar
WB-Redhawk
WB4458
WB-Grainfield
Winterhawk
T153
T154
T158 2.4
LCS Mint
LCS Wizard
LCS Pistol
LCH13DH-20-87 6.0
LCH13DH-14-91
TAM 112
TAM 204
TAM 113
TAM 114
CO11D174 .
Byrd
Brawl CL Plus
OK09125
OK1059060-2C14
OK10126
OK11D25056 1.8
OK11231
OK12621 3.9
OK13625
OK0986130-7C13
OK08P707W-19C13 3.8
OK10728W
OK11755W

 

 

First hollow stem update 03/12/15

First hollow stem is the optimal time to remove cattle from wheat pasture (full explanation). To monitor first hollow stem, we measure hollow stem for the 56 lines in our September-sown wheat forage plots at Stillwater each year. In spite of the recent cold snap many varieties are progressing towards first hollow stem. The small grains extension crew split ten stems from lines tested in our program today and Billings, Duster, Iba, Oakley CL, Hot Rod (formerly KS061406), WB Greenfield, and LCS Wizard join the list of varieties at or past first hollow stem. Full results are posted in the table below. Varieties with no value for first hollow stem reached first hollow stem on a previous measurement date.

We will take another set of measurements early next week and report the results on this blog. You can check progression of first hollow stem around the state by using the First Hollow Stem Advisor on the Oklahoma Mesonet site.

 

First hollow stem measured in wheat sown 09/16/2014 at Stillwater, OK. Varieties with ‘-‘ reached first hollow stem on a previous measurement date
Variety cm of hollow stem 03/12/15
Endurance 0.2
Deliver 1.0
Pete 0.6
OK Rising 1.1
Billings 1.6
Ruby Lee 0.9
Garrison 1.2
Duster 1.8
Gallagher
Iba 1.7
Centerfield 0.8
Doublestop CL Plus 1.4
NF 101
Everest
1863
KanMark
Oakley CL 2.0
Hot Rod 2.8
SY Llano
SY Southwind
Greer
Jackpot
SY Monument 1.2
SY Flint
SY Drifter
WB-Cedar
WB-Redhawk
WB4458
WB-Grainfield 2.0
Winterhawk
T153
T154
T158 0.9
LCS Mint
LCS Wizard 1.5
LCS Pistol
LCH13DH-20-87 2.6
LCH13DH-14-91
TAM 112
TAM 204
TAM 113
TAM 114
CO11D174
Byrd
Brawl CL Plus
OK09125 1.9
OK1059060-2C14 1.6
OK10126
OK11D25056 1.1
OK11231
OK12621 1.2
OK13625
OK0986130-7C13
OK08P707W-19C13 1.3
OK10728W
OK11755W

 

 

 

First hollow stem update 03/09/15

First hollow stem is the optimal time to remove cattle from wheat pasture (full explanation). To monitor first hollow stem, we measure hollow stem for the 56 lines in our September-sown wheat forage plots at Stillwater each year. In spite of the recent cold snap many varieties are progressing towards first hollow stem. The small grains extension crew split ten stems from lines tested in our program today and KanMark, Sy Southwind and Greer join the list of varieties at or past first hollow stem. Full results are posted in the table below. Varieties with no value for first hollow stem reached first hollow stem on a previous measurement date.

We will take another set of measurements later this week and report the results on this blog. Given the warm forecast for the coming week, I predict that all varieties will be well past first hollow stem by Friday. You can check progression of first hollow stem around the state by using the First Hollow Stem Advisor on the Oklahoma Mesonet site.

 

First hollow stem measured in wheat sown 09/16/2014 at Stillwater, OK. Varieties with ‘-‘ reached first hollow stem on a previous measurement date
Variety cm of hollow stem 03/09/15
Endurance 0.2
Deliver 0.2
Pete 0.3
OK Rising 0.7
Billings 1.0
Ruby Lee 0.6
Garrison 0.9
Duster 0.9
Gallagher
Iba 0.8
Centerfield 0.5
Doublestop CL Plus 0.6
NF 101
Everest
1863
KanMark 1.5
Oakley CL 0.9
KS061406 1.2
Sy Llano
Sy Southwind 2.6
Greer 2.1
Jackpot
Sy Monument 0.7
06BC722#25
AP09T7631 1.5
WB-Cedar
WB-Redhawk
WB4458
WB-Grainfield 0.8
Winterhawk
T153
T154
T158 0.8
LCS Mint
LCS Wizard 0.6
LCS Pistol
LCH13DH-20-87 1.0
LCH13DH-14-91
TAM 112
TAM 204
TAM 113
TAM 114
CO11D174 2.2
Byrd
Brawl CL Plus
OK09125 1.3
OK1059060-2C14 0.9
OK10126
OK11D25056 1.1
OK11231
OK12621 1.1
OK13625
OK0986130-7C13
OK08P707W-19C13 1.4
OK10728W
OK11755W