2014 Official Coded Variety Trials

2014 Official Coded Variety Trials

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View Official Trial Location Sites

The 2014 official coded variety performance trials and disease nurseries were planted at 19 sites by American Crystal Sugar Company (ACSC) including 13 yield trial sites. Four additional disease nurseries were planted by third party cooperators. Thanks are extended to the dedicated Technical Services staff involved in the official trial plot care, harvest, and analyses.

Results

Results from the Official Variety Trials sites were good to excellent. Stands in the trials were generally excellent this year. Eight sites were used for variety approval calculations. Two sites were abandoned due to substantial water damage (Averill and Buxton). One yield trial experienced moderate to severe Aphanomyces (Climax, data in table 3). Based upon susceptible plot observations, root aphids had only a slight effect on varieties in 2014. ACSC does not run root aphid evaluation nurseries, but seed companies may know tolerance levels of their varieties. The Climax site was harvested but not included in full market variety approval calculations (kept separate for consideration by growers for Aph conditions).

Rhizoctonia was less prevalent in 2014 following the use of optional Rhizoctonia seed treatments and application of Quadris, at the 6-10 leaf stage. Revenue calculations in 2014 are based on a hypothetical $55.98 payment (5-year rolling average) at 17.5% sugar and 1.5% SLM not considering hauling or production costs.

Fusarium ratings are from two Moorhead sites. The Rhizoctonia data is from one ACSC Moorhead site plus a site at Michigan USDA. The Aphanomyces ratings are from two Shakopee sites. The Cercospora data is from Foxhome, MN; Rosemount, MN; and Michigan USDA.

The 2014 data has been combined with the previous years’ data, and results are enclosed. Due to the lack of visual rhizomania symptoms, site were not categorized based upon infection level and no tables of moderate to heavy rhizomania are included. Rhizoctonia and Fusarium ratings are optional on first year Roundup Ready® (RR) entries. Results for the yield trials from individual sites can be found on the internet.

Bolter data is presented in plants per acre based upon 45,000 plants per acre.

The treatments used on the seed planted in the official variety yield trials can be found in table 6.

Thirty-one conventional varieties are approved for sale in 2015; many of these varieties were not tested since 2008. Conventional trials were discontinued in 2012. Data for conventional varieties tested in 2009-2011 may be found in last year’s Sugarbeet Research and Extension Report or last year’s Official Variety Trial Report.

More detailed information will be printed later in the Sugarbeet Research and Extension Reports (www.sbreb.org).

Click here to open a pdf file with the 2014 Grower Info including:

Attached are the following pages of information:

  1. List of varieties approved for sale to ACSC growers
  2. Multi-year performance of RR varieties from all sites
  3. Performance of RR varieties under Aphanomyces conditions in 2014 from Climax
  4. Disease ratings for all nurseries (varieties tested in 2014)
  5. Trial sites, disease observations and agronomic information from all trial locations
  6. Seed treatments applied to seed used in the official coded variety trials

Download 2014 Grower Info in Excel Format

Links to 2014 data only follow:

Links to 2014 Variety Selector Data (sorted by characteristics) follow:

Plot Procedures

Roundup Ready and Aphanomyces trials were planted to stand at 4.5 inches. Averill and Buxton were abandoned due to extended water standing on much of the sites and difficulty in obtaining good weed control during that time. The Kindred and Georgetown Aphanomyces sites were abandoned due to water damage, heavy sprangling and a lack of Aphanomyces root scarring. Two RRV Rhizoctonia nurseries were abandoned due to lack of infection.

Plots were planted crosswise (90°) to the cooperators’ normal farming operations, where possible. Plot row lengths for all official trials were maintained at 44 feet with about 37 feet harvested. All trials had two or four-row plots planted in four or six replications. Planting was performed with two 12-row vacuum planters, which included a SRES and a Hege. The SRES GPS controlled planter was used for all yield trial sites in 2014 and gave good single seed spacing (with proper seed size) which facilitated emergence counts. Seed companies had the option of treating seed with Tachigaren, insecticide and a Rhizoctonia seed treatment fungicide. Emergence counts were taken on 44 feet of each plot. Multiple seedlings were counted as a single plant if they emerged less than one inch apart. The stands in all yield trials were refined by removing doubles (multiple seedlings less than 1.5 inch apart) by hand but were not further reduced.

Roundup Powermax with Event and full rates of fungicides were applied using a pickup sprayer driven down the alleys. Hand weeding was used where necessary. All yield trials were treated with Quadris during the 6-10 leaf stage (14 oz/A broadcast since 2004) for Rhizoctonia control. Proline/Agri Tin, Topsin/Agri Tin, and Headline were used for Cercospora control in 2014. Ground spraying was conducted by ACSC technical staff.

RR varieties with commercial seed were planted in four-row, six replication trials. The RR experimental entries were planted in smaller two-row, four replication trials. Two applications of Roundup were made in the 4-6 (32 oz) and 8‑12 (22 oz) leaf stages.

All plot rows were measured for total length after approximately 2.5 feet at each end were removed at the end of August, with skips greater than 60 inches being measured for adjustment purposes. Harvest was performed with two modified four-row harvesters (4310 and 4310A John Deere). All harvested beets of each plot were used for yield determination while one sample (approx 25 lbs) for sugar and impurity analysis was obtained from each plot. Quality analysis was performed at the ACSC Technical Services quality lab in Moorhead.

Varieties were planted in disease nurseries in North Dakota, Minnesota and Michigan to evaluate varieties for disease tolerance.

ACSC adjusts the Cercospora, Aphanomyces, Rhizoctonia and Fusarium nursery data each year to provide a consistent target for variety approval criteria.

Before purchasing seed, please check to make sure the varieties you are buying are on the current approved list. In accordance with the grower contract, the cooperative has the option to refuse beets of a non-approved variety. If you have questions, please contact the ACSCTechnicalServicesCenter or your ACSC Agriculture Department.

Sincerely,

William S. Niehaus
Official Trial Manager