Home » first hollow stem » First hollow stem update 02/23/2016

First hollow stem update 02/23/2016

About Me

Amanda De Oliveira Silva

Amanda De Oliveira Silva

I have served as an Assistant Professor and Small Grains Extension Specialist at Oklahoma State University since August 2019. I believe that close interaction with producers is vital to understand their production strategies and to establish realistic research goals. My program focuses on developing science-based information to improve the agronomic and economic viability of small grains production in Oklahoma and in the Southern Great Plains.

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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



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