2018-2019 Small Grains Variety Performance Tests

Wheat Crop Overview

According to the August 2019 USDA crop report, Oklahoma wheat production is estimated to be approximately 110 million bushels, which is about 57 percent greater than 2018 production (Table 1) and 12 percent greater than 2017 production. The increase in total grain production is the result of 250,000 more harvested acres than 2018 and much greater yield per acre. The 4.3 million acres planted in the 2019 crop year was a 2 percent decrease compared to the previous year, and was 16 percent lower than the previous 10-year average. The number of harvested acres is estimated at 2.75 million, which is 10 percent greater than in 2018 (Table 1). The statewide average yield is projected at 40 bushels per acre, which would be a new record. This is 12 bushels per acre (43 percent) greater than the 2018 state average and 11.5 bushels per acre (40 percent) greater than the previous ten-year average.

 

Table 1. Oklahoma wheat production for 2018 and 2019 as estimated by USDA NASS, August 2019.

The 2018-2019 wheat growing season was challenging from establishment through grain-fill, but the end result was a harvest that exceeded expectations for most producers. Dual purpose wheat producers in most areas of the state benefited from a full profile of moisture in early September and favorable conditions for wheat growth. Wheat forage production was well above average, with some varieties producing more than

 

2 tons of forage per acre by mid-December (see CR 2141 Fall forage production and first hollow stem date for small grain varieties during the 2018-2019 crop year for more information).

 

The same rains that fueled fall forage growth kept many grain-only producers from planting in a timely fashion. Sowing wheat in late October through the end of November was the norm, and many wheat fields entered the winter months still trying to emerge or with only one or two leaves. Cool conditions further delayed development and occurrence of first hollow stem was approximately one week later than the long-term average. Fortunately, moderate temperatures and ample moisture allowed a late-emerging and under-developed wheat crop to add tillers and develop a plant canopy.

 

Conditions for wheat development and grain fill remained mostly favorable until excessive rainfall events in May had many producers again questioning whether or not a wheat crop would be harvested in 2019. The October 1, 2018 – July 22, 2019 time frame was the fourth wettest on record for Oklahoma, and May stood out as an extreme month in an already wet production year. The Oklahoma Mesonet station at Lahoma, for example, recorded 12.7 inches of rainfall in May 2019, which is approximately 8 inches more than normal. The Kingfisher station reported 15.9 inches of May rainfall, which is more than 10 inches above normal. Several fields were complete losses due to flooding, and several additional fields were severely lodged from waterlogged soil conditions. There was concern that waterlogged soil conditions would adversely affect seed development and seed fill, resulting in poor yields or low test weights.

 

These wet and cool conditions also paved the way for severe disease incidence and severity in the 2019 Oklahoma wheat crop, especially in north-central Oklahoma. Few diseases were observed during the fall of 2018, with leaf rust at a low incidence being the primary disease reported. Lack of disease in the fall was probably the result of a significantly later planting date across much of the state as discussed above. Foliar disease also was slow to start in the spring, but with the cool and moist weather extending into the late spring, both rusts (leaf and stripe) and the leaf spot diseases (Septoria, Stagonospora and tan spot) were much more widespread and severe across Oklahoma in 2019. Often, Septoria and Stagonospora were found on the upper wheat leaves and flag leaf, which is atypical in Oklahoma. At many locations, foliar diseases were not observed until well into May, and a few locations (e.g. northwestern Oklahoma and the Panhandle) had lighter foliar disease pressure than the rest of Oklahoma. Most locations in north-central and central Oklahoma had at least one foliar disease of moderate to high severity with a few locations having a high severity of several diseases. Septoria and leaf rust remained the most prominent diseases across the state. Physiological leaf spot was detectable on some cultivars when symptoms of Septoria or leaf rust were delayed or suppressed by a fungicide treatment.

 

Root rots (primarily dryland root rot caused by the fungus Fusarium) and black chaff (caused by the bacterium Xanthomonas) were more prevalent than typical for Oklahoma. Fusarium head blight (scab) also occurred primarily in northeastern Oklahoma, but fortunately did not occur at a high incidence over the main wheat area of Oklahoma. Barley yellow dwarf was sporadic and was observed at only a few locations. The wheat curl mite-transmitted virus diseases (wheat streak mosaic, Triticum mosaic and high plains disease) were found but not nearly to the level as found in the past couple of years. Delayed planting is a recommended management strategy for these insect-vectored diseases, and the delayed planting associated with the wet fall probably helped reduce the incidence of barley yellow dwarf and the mite-transmitted virus diseases. Powdery mildew was observed at a lower incidence and severity than in most years. In summary, it was a very active year for diseases in Oklahoma with the mild and wet weather facilitating many diseases. The mild and wet weather also improved yield prospects by the time producers were making decisions regarding application of foliar fungicides, and many producers chose to protect yield potential with foliar fungicides. Data from fungicide treated and nontreated variety trial comparisons at Lahoma, Apache and Chickasha provide indication of the impact of foliar disease on grain yield and suggest that applying a foliar fungicide was a profitable decision for many Oklahoma wheat farmers in 2019.

 

Harvest started approximately one week later than normal, with no reports of wheat harvested prior to Memorial Day in 2019. Rainfall resulted in a very slow and intermittent start to harvest and waterlogged soil conditions presented challenges. Weather and soil conditions improved by mid-June, and harvest continued at a steady pace until conclusion in the latter half of July in the Oklahoma Panhandle. Grain yields exceeded expectations with some of the best yields coming from Harper County west through the Panhandle. The delayed harvest and waterlogged soil conditions did result in some low test weights, but the extent of the damage varied by geography and variety.

 

Testing Methods

Seed was packaged and planted in the same condition as it was delivered from the respective seed companies. Most seed was treated with an insecticide plus a fungicide, but the formulation and rate of seed treatment used was not confirmed or reported in this document.

 

Conventional-till plots were eight rows wide with 6-inch row spacing and were sown with a Hege small-plot cone seeder. No-till plots were seven rows wide with 7.5-inch row spacing and were sown with a Great Plains no-till drill modified for cone-seeded, small-plot research. With the exception of dryland locations in the Panhandle, plots were planted 25 feet long and trimmed to 19 feet at harvest with the plot combine. Panhandle dryland locations were 35 feet long at planting and trimmed to 29 feet at harvest. Wheel tracks were included in the plot area for yield calculation, for a total plot width of 60 inches. Experimental design for all sites other than Apache and Lahoma was a randomized complete block with four replications. Apache and Lahoma were a split-plot arrangement of a randomized complete block with four replications where whole plots were fungicide treated or non-treated, and sub-plots were wheat variety.

 

Conventional-till plots received 50 pounds per acre of 18-46-0 in-furrow at planting. No-till plots received 5 gallons per acre of 10-34-0 at planting. The Marshall dual-purpose (DP) trial, Union City, Walters and forage trials were sown at 120 pounds per acre. The Panhandle irrigated and dryland locations were sown at 90 and 45 pounds per acre, respectively. All other locations were sown at 60 pounds per acre. Grazing intensity, nitrogen fertilization and insect and weed control decisions were made on a location-by-location basis and reflect standard management practices for the area.

 

Plots were harvested with a Hege or Wintersteiger Delta small plot combine. Grain weight, test weight and moisture content were collected from each plot, and grain yields were corrected to 12 percent moisture content. Grain moisture at all sites was generally below 12 percent, and maximum and minimum grain moisture for all plots at a location typically ranged no more than 2 percent. The Afton plots were harvested, but data are not reported as the trial coefficient of variation (c.v.) exceeded 25. The Marshall plots were not harvested due to severe weed pressure.

 

Data Interpretation

Yield and test weight data for each location and regional summary were analyzed using the appropriate statistical methods. At the bottom of each table, the mean and least significant difference (LSD) values are reported. The LSD is a test statistic that aids in determining whether there is a true difference in yield or test weight. In this report, one can be 95 percent confident that the difference between two varieties is real if the difference is equal to or greater than the LSD value. Data that is not significant is indicated by “NS.” For example, if the LSD value is 4 bushels per acre in a trial which Variety A yielded 30 bushels per acre and Variety B yielded 26, then Variety A would be considered to have a statistically greater yield. However, if Variety C yielded 27 bushels per acre, then Variety A and Variety C would be considered to have a similar yield. In that same example trial, there is a 5 percent chance that the 4-bushels-per-acre difference between Variety A and Variety B does not truly exist, but random chance caused the five-bushel difference. These chance factors may include differences in fertility, moisture availability and diseases, for example. To aid in determining the varieties with the highest yields and test weights, values highlighted in gray do not differ statistically from the highest value within a column. The performance of a variety may vary from year to year, even at the same location. Tests over two or more years and over multiple locations more accurately predict the variety performance.

 

Additional Information on the Web

A copy of this publication as well as additional information about wheat management can be found at:

 

Website - http://www.wheat.okstate.edu/

Blog -  https://osuwheat.com/

Twitter: @OSU_smallgrains -   https://twitter.com/@OSU_smallgrains

Facebook: OSU Small Grains - https://www.facebook.com/OSUsmallgrains/

YouTube: OSU Small Grains -   https://www.youtube.com/user/OSUNPK/videos

 

Funding Provided By

Oklahoma Wheat Commission

Oklahoma Wheat Research Foundation

OSU Cooperative Extension Service

OSU Agricultural Experiment Station

Entry fees from participating seed companies

 

Area Extension Staff

Brian Pugh, OSU Area Agronomist, Northeast District

Josh Bushong, OSU Area Agronomist, Northwest District

Heath Sanders, OSU Area Agronomist, Southwest District

 

County Extension Educators

Thomas Puffinbarger, Alfalfa County

Loren Sizelove, Beaver County

David Nowlin, Caddo County

Kyle Worthington, Canadian County

Sug Farrington, former Cimarron County

Kimbreley Davis, Cotton County

Ron Wright, Custer County

Rick Nelson, Garfield County

Shiann Burns, Grady County

Kassie Junghanns, former Grant County

Darrell McBee, Harper County

Gary Strickland, Jackson and Greer Counties

Bryan Kennedy, Kingfisher County

Troy Gosney, Major County

Courtney May, former Ottawa County

Dr. Britt Hicks, Texas County & Area Extension Livestock

Specialist

Greg Highfill, Woods County

 

Station Superintendents

Erich Wehrenberg, Agronomy Research Station, Stillwater

David Victor, North Central Research Station, Lahoma

Cameron Murley, Oklahoma Panhandle Research and

Extension Center, Goodwell

Michael Pettijohn, South Central Research Station, Chickasha

Mike Schulz, Southwest Research and Extension Center, Altus

 

Student Workers

Cade Miller

Dallas Williams

We sincerely thank our variety trial cooperators for donation of land, time and resources. Variety trial cooperators not otherwise listed in this document include:

Dean Fuxa, Marshall, OK

Greg Leonard, Afton, OK

 

Participating Seed Companies

AgriMAXX Wheat Company

Matt Wehmeyer

7167 Highbanks Road

Mascoutah, IL 62258

Phone: (855) 629-9432

Email: matt@agrimaxxwheat.com

Agrimaxx - https://agrimaxxwheat.com/

Variety: AM Eastwood

 

AgriPro

Greg Gungoll

1517 Osage Ave.

Enid, OK 73703

Phone: (405) 714-2839

Email: greg.gungoll@syngenta.com

AgriPro Wheat

Varieties: Bob Dole, SY Achieve CL2, SY Benefit, SY Flint, SY Grit, SY Monument, SY Razor, SY Rugged

 

AGSECO, Inc.

Steve Ahring

P.O. Box 7

Girard, KS 66743

Phone: (620) 724-6223

Email: steve@delangeseed.com

AGESCO

Varieties: AG Gallant, AG Icon, TAM 114

 

CROPLAN by Winfield United

Mark Torno

225 Marina Way

Garrison, ND 58540

Phone: (651) 375-6448

Email: MTorno@landolakes.com

Variety: CP7826, CP7869, CP7909

 

Dyna-Gro Seed

Shawn Carter

3492 Long Prairie Road Suite 200

Flower Mound, TX 75022

Phone: (318) 282-9804

Email: shawn.carter@nutrien.com

Dyna-Gro Seed

Variety: Long Branch

 

Kansas Wheat Alliance (KWA)

Daryl Strouts

1990 Kimball Avenue Suite 200

Manhattan, KS 66502

Phone: (785) 320-4080

Email: kwa@kansas.net

Kansas Wheat Alliance

Varieties: Joe, KS Venada, KS080093K-18, Larry, Zenda

 

Limagrain Cereal Seeds (LCS)

Drew Hendricker

2040 SE Frontage Road

Fort Collins, CO 80525

Phone: (970) 498-2218

Email: drew.hendricker@limagrain.com

Varieties: LCH15ACC7-7, LCS Chrome, LCS Pistol

 

Oklahoma Genetics Inc. (OGI)

Mark Hodges

201 South Ranger Road

Stillwater, OK 74074

Phone: (405) 744-4347

OK Genetics

Varieties: Baker’s Ann, Bentley, Doublestop CL Plus, Duster, Gallagher, Green Hammer, Iba, Lonerider, NF 101, Ruby Lee, Showdown, Skydance, Smith’s Gold, Spirit Rider, Stardust

 

PlainsGold (Colorado Wheat Research Foundation)

Brad Erker/Tyler Benninghoven

4026 S. Timberline Road. Ste. 100

Fort Collins, CO 80525

Phone: (970) 449-6994

Colorado Wheat

Variety: Canvas, Crescent AX, Langin

 

Watley Seed

Andy Watley

Box 51

Spearman, TX 79081

Phone: (806) 659-3838

Email: watleyseed@windstream.net

Watley Seed Company

Varieties: TAM 112, TAM 204

 

WestBred

John Fenderson

1616 E. Glencoe Road

Stillwater, OK 74075

Phone: (620) 243-4263

Email: john.m.fenderson@monsanto.com

WestBred Wheat

Varieties: WB4269, WB4303, WB4418, WB4515, WB4595, WB4699, WB4792, WB-Grainfield

 

 Table 2. 2018-2019 Oklahoma wheat variety performance tests region summary. 

 

 

 

 

Table 3. 2018-2019 Oklahoma wheat variety performance tests summary.

 

 

Table 5.  Regional Trial Location Summary

Locations: Altus, Chickasha, Goodwell and Lahoma

Notes: Grain yields adjusted to 12 percent moisture content. Data for varieties reported from the Altus, Chickasha, Chickasha Intensive Management, Goodwell Irrigated, Lahoma and Lahoma Fungicide trials are included in this analysis.

 

Table 6. Central Region

Locations: Chickasha, Kingfisher, Thomas and Union City

Notes: Grain yields adjusted to 12 percent moisture content. Data for varieties reported from the Chickasha, Chickasha Intensive Management, Kingfisher, Thomas and Union City trials are included in this analysis.

 

Table 7. North Central Region Summary

Locations: Homestead, Kildare, Lahoma and Lamont

Notes: Grain yields adjusted to 12 percent moisture content. Shaded values are not statistically different from the highest value within a column. Data for varieties reported from the Homestead, Kildare, Lahoma, Lahoma Fungicide and Lamont trials are included in this analysis.

 

Table 8. Northwest Region

Locations: Alva, Buffalo and Cherokee

Notes: Grain yields adjusted to 12 percent moisture content. Data for varieties reported from the Alva, Buffalo and Cherokee trials are included in this analysis.

 

Table 9. Panhandle Region

Locations: Balko, Goodwell, Hooker and Keyes

Notes: Grain yields adjusted to 12 percent moisture content. Data for varieties reported from the Balko, Goodwell Irrigated, Hooker and Keyes trials are included in this analysis.

 

Table 10. Southwest Region Summary

Locations: Altus, Apache and Walters

Notes: Grain yields adjusted to 12 percent moisture content. Data for varieties reported from the Altus, Apache, Apache Fungicide and Walters trials are included in this analysis.

 

Table 11.  Apache Wheat Variety Trial

Planting & harvest dates: 10/4/18 & 6/10/19
Management: Grain-only
Tillage: No-till

 

Previous crop: Soybean (hayed)
Soil type: Tillman silty clay loam
Soil test: pH = 5.2, P = 134, K = 494

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a scale from 1 to 5, with 1 indicating no lodging. Low stripe and leaf rust disease pressure and moderate to severe Septoria disease pressure observed during grain-fill.

 

Table 12.  Apache Fungicide Wheat Variety Trial

Planting & harvest dates: 10/4/18 & 6/10/19
Management: Grain-only
Tillage: No-till

 

Previous crop: Soybean (hayed)
Soil type: Tillman silty clay loam
Soil test: pH = 5.2, P = 134, K = 494

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a scale from 1 to 5 with 1 indicating no lodging.

 

Table 13. Apache Wheat Variety Trial - Fungicide vs. No Fungicide Comparison

Planting & harvest dates: 10/4/18 & 6/10/19
Management: Grain-only, no-till

 

Previous crop: Soybean (hayed)
Fungicide: 4 fl oz/ac TebuStar at heading on 4/12/19

 

Soil type: Tillman silty clay loam
Soil test: pH = 5.2, P = 134, K = 494

Notes: Grain yields adjusted to 12 percent moisture content. Low stripe and leaf rust disease pressure and moderate to severe Septoria disease pressure observed during grain-fill.

 

 

Table 14A . Altus Regional Wheat Variety Trial

Planting & harvest dates: 10/4/18 & 5/31/19
Management: Grain-only
Tillage: Conventional

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a 1-to-5 scale, with 1 indicating no lodging. Moderate leaf rust pressure throughout grain-fill.

Table 15A. Alva Wheat Variety Trial

Planting & harvest dates: 10/22/18 & 6/21/19
Management: Grain-only
Tillage: Conventional

 

Previous crop: Wheat
Soil type: Grant silt loam
Soil test: pH = 7.2, P = 35, K = 664

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a scale from 1 to 5, with 1 indicating no lodging. Low leaf rust and low to moderate Septoria disease pressure observed during grain-fill.

 

 

Table 16A. Balko Wheat Variety Trial

Planting & harvest dates: 9/27/18 & 7/4/19
Management: Grain-only
Tillage: No-till

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a scale from 1 to 5, with 1 indicating no lodging. Very low foliar disease pressure observed throughout grain-fill.

 

 

Table 17. Planting & harvest date

Planting & harvest dates: 9/27/18 & 7/4/19
Management: Grain-only
Tillage: No-till

Notes: Grain yields adjusted to 12 percent moisture content. NS = not significant. Lodging on a scale from 1 to 5, with 1 indicating no lodging. Low Septoria disease pressure observed during grain-fill.

 

Table 18. Cherokee Wheat Variety Trial

Planting & harvest dates: 10/22/18 & 7/12/19

Management: Grain-only

Tillage: Conventional

 

Previous crop: Wheat

Soil type: Dale silt loam

Soil test: pH = 7.2, P = 51, K = 655

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a 1-to-5 scale, with 1 indicating no lodging. Low disease pressure observed during grain-fill. Harvest was extremely delayed due to rain and resulted in poor seed quality.

 

Table 19. Chickasha Regional Wheat Variety Trial

Planting & harvest dates: 11/6/18 & 6/13/19

Management: Grain-only

Nitrogen: 46 lbs/ac soil test + 9 lbs/ac at planting + 100 lbs/ac topdress 2/15/19

 

Previous crop: Wheat

Tillage: Conventional

 

Soil type: Dale silt loam

Soil test: pH = 7.1, P = 39, K = 274

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a 1-to-5 scale, with 1 indicating no lodging. Low to moderate Septoria and leaf rust and moderate stripe rust disease pressure observed during grain-fill.

 

Table 20. Chickasha Intensive Wheat Management Variety Trial

Planting & harvest dates: 11/6/18 & 6/13/19

Management: Grain-only, conventional tillage

Nitrogen: 46 lbs/ac soil test + 9 lbs/ac at planting + 100 lbs/ac topdress 2/15/19 + 40 lbs/ac topdress 3/19/19

 

Previous crop: Wheat

Soil test: pH = 7.1, P = 39, K = 274

 

Soil type: Dale silt loam

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a 1-to-5 scale, with 1 indicating no lodging.

 

Table 21.  Chickasha Standard vs. Intensive Wheat Management Comparison

Planting & harvest dates: 11/6/18 & 6/13/19
Management: Grain-only, conventional tillage
All plots had 55 lbs/ac N available at planting and received 100 lbs/ac N topdress on 2/15/19. Intensive Wheat Management
(IWM) plots received 4 fl oz/ac Tilt at jointing on 2/26/19, 40 lbs/ac additional N on 3/19/19 and 13 fl oz/ac Nexicor at heading on 4/26/19.

 

Previous crop: Wheat
Soil test: pH = 7.1, P = 39, K = 274

 

Soil type: Dale silt loam

Notes: Grain yields adjusted to 12 percent moisture content. Low to moderate Septoria and leaf rust and moderate stripe rust disease pressure observed during grain-fill.

 

 

Table 22. Goodwell Irrigated Wheat Variety Trial

Planting & harvest dates: 9/26/18 & 7/2/19
Management: Grain-only
Tillage: Conventional

 

Previous crop: Fallow
Soil type: Gruver clay loam
Soil test: pH = 7.6, P = 40, K = 1,290

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a scale from 1 to 5, with 1 indicating no lodging. No irrigation water was applied during the season due to adequate rainfall. Very low foliar disease pressure observed throughout grain-fill.

 

 

Table 23. Homestead Wheat Variety Trial

Planting & harvest dates: 10/23/18 & 6/14/19
Management: Grain-only
Tillage: Conventional

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a scale from 1 to 5, with 1 indicating no lodging. Moderate leaf rust and low to moderate Septoria disease pressure observed during grain-fill.

 

 

Table 24. Hooker Wheat Variety Trial

Planting & harvest dates: 9/26/18 & 6/26/19

Management: Grain-only

Tillage: No-till

 

Previous crop: Fallow

Soil type: Dalhart fine sandy loam

Soil test: pH = 6.7, P = 60, K = 703

Notes: Grain yields adjusted to 12 percent moisture content. Shaded values are not statistically different from the highest value within a column. Lodging on a scale from 1 to 5, with 1 indicating no lodging. Low Septoria disease pressure observed during grain-fill.

 

Three-year results are the average of 2019, 2018, and 2016. Data was not reported in 2017 due to excessive variability.

 

 

 

Table 25. Keyes Wheat Variety Trial

Planting & harvest dates: 9/27/18 & 7/1/19

Management: Grain-only

Tillage: No-till

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a scale from 1 to 5, with 1 indicating no lodging. Very low foliar disease pressure observed during grain-fill.

 

Table 26. Kildare Wheat Variety Trial 

Planting & harvest dates: 10/23/18 & 6/27/19
Management: Grain-only
Tillage: No-till

 

Previous crop: Wheat
Soil type: Tabler silt loam
Soil test: pH = 7.1, P = 82, K = 381

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a scale from 1 to 5, with 1 indicating no lodging. Low to moderate Septoria disease pressure observed during grain-fill.

 

 

 

Table 27. Kingfisher Wheat Variety Trial

Planting & harvest dates: 10/3/18 & 6/15/19
Management: Grain-only
Tillage: Conventional

 

Previous crop: Wheat
Soil type: Tillman silt loam
Soil test: pH = 6.4, P = 46, K = 595

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a scale from 1 to 5, with 1 indicating no lodging. Moderate Septoria and leaf rust disease pressure observed during grain-fill.

 

 

Table 28. Lahoma Regional Wheat Variety Trial

Planting & harvest dates: 11/2/18 & 6/24/19
Management: Grain-only
Tillage: Conventional

 

Previous crop: Wheat
Soil type: Pond Creek silt loam
Soil test: pH = 6.1, P = 64, K = 442

Notes: Grain yields adjusted to 12 percent moisture content.

Grain samples were too small to measure test weight Lodging on a scale from 1 to 5, with 1 indicating no lodging. Moderate to severe leaf rust disease pressure observed during grain-fill

 

 

 

Table 29. Lahoma Regional Wheat Variety Trial - Fungicide Treated

Planting & harvest dates: 11/2/18 & 6/24/19
Management: Grain-only, conventional tillage
Fungicide: 4 fl oz/ac TebuStar at heading on 5/5/19

 

Previous crop: WheatSoil type: Pond Creek silt loam
Soil test: pH = 6.1, P = 64, K = 442

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a scale from 1 to 5, with 1 indicating no lodging.

 

 

Table 30. Lahoma - Fungicide vs. No Fungicide Comparison

Planting & harvest dates: 11/2/18 & 6/24/19
Management: Grain-only, conventional
tillage
Management: Grain-only, conventional
Fungicide: 4 fl oz/ac TebuStar at heading on 5/5/19tillage

 

Previous crop: Wheat
Soil type: Pond Creek silt loam
Soil test: pH = 6.1, P = 64, K = 442

Notes: Grain yields adjusted to 12 percent moisture. Moderate to severe leaf rust disease pressure observed during grain-fill.

 

 

 

Table 31. Lamont Wheat Variety Trial

Planting & harvest dates: 10/31/18 & 6/27/19
Management: Grain-only
Tillage: Conventional

 

Previous crop: Wheat
Soil type: Pond Creek silt loam
Soil test: pH = 6.1, P = 55, K = 344

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a 1 to 5 scale, with 1 indicating no lodging. Fusarium head blight observed during grain-fill and sooty mold observed prior to harvest.

 

Three-year results are the average of 2019, 2018 and 2016. Data was not collected from this location in 2017.

 

 

 

Table 32. Thomas Wheat Variety Trial

Planting & harvest dates: 10/2/18 & 6/14/19
Management: Grain-only
Tillage: Conventional

Notes: Grain yields adjusted to 12 percent moisture content.Lodging on a scale from 1 to 5, with 1 indicating no lodging. Moderate leaf and stripe rust and low to moderate Septoria disease pressure observed during grain-fill.

 

 

Table 33. Union City Wheat Variety Trial

Planting & harvest dates: 11/5/18 & 7/5/19
Management: Dual-purpose
Tillage: Conventional

 

Previous crop: Wheat
Soil type: Pond Creek silt loam
Soil test: pH = 7.3, P = 70, K = 283

Notes: Grain yields adjusted to 12 percent moisture content. Lodging on a scale from 1 to 5 with 1 indicating no lodging. Plots were not grazed due to the delayed planting date. Low to moderate Septoria and leaf rust disease pressure observed throughout grain-fill. Harvest was extremely delayed due to rain.

 

 

 

Table 34. Walters Wheat Variety Trial

Planting & harvest dates: 9/18/18 & 6/7/19
Management: Dual-purpose
Tillage: No-till

 

Previous crop: Canola
Soil type: Foard silt loam
Soil test: pH = 6.4, P = 28, K = 335

Notes: Grain yields adjusted to 12 percent moisture. Lodging on a scale from 1 to 5, with 1 indicating no lodging. Plots were grazed from 12/11/18 through 3/1/19 at a stocking rate of 310 pounds per acre (1.9 acres per head). Low stripe and leaf rust disease pressure observed throughout grain-fill. TAM 204, SY Razor and WB4303 were removed from the analysis due to wild hog damage.

 

 

 

Table 35. 2018-2019 Oklahoma wheat variety performance tests - heading date and plant height.

 

 

Robert Calhoun

Senior Agriculturalist

 

Brett Carver

Wheat Breeder

 

Bob Hunger

Extension Plant Pathologist

 

Jeff Edwards

Head, Plant and Soil Sciences

 

Branden Watson

Graduate Research Assistant

 

Christopher Gillespie

Graduate Research Assistant