2015 Official Coded Variety Trials

2015 Official Coded Variety Trials

View Trial Procedures

Variety Selector

The Variety Selector is intended to assist growers in selecting appropriate seed varieties by identifying varieties with characteristics that are known to be consistent with the information provided by the grower.

View Official Trial Location Sites

The 2015 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.  Ten sites were used for variety approval calculations.  One site was abandoned due to heavy straw residue and reduced plant growth (Stephen).  Two sites experienced moderate to severe Aphanomyces (Kindred and Cavalier), and this Aphanomyces yield trial data is in table 3.  Rhizoctonia was less prevalent in 2015 yield trials following the use of optional Rhizoctonia seed treatments and application of Quadris, at the 6-10 leaf stage.  Based upon susceptible plot observations, root aphids had only a slight effect on varieties in 2015.  Preliminary root aphid evaluations are in progress, but seed companies may know tolerance levels of their varieties.  Revenue calculations in 2015 are based on a hypothetical $54.96 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 ratings are from two ACSC Moorhead sites, one NWROC site plus a site in Michigan with the USDA.  The Aphanomyces ratings are from Shakopee.  The Cercospora data is from Foxhome, MN; Randolph, MN; and Michigan USDA.  Rhizoctonia and Fusarium ratings are optional on first year Roundup Ready® (RR) entries.  Some varieties were omitted from the Rhizoctonia and Fusarium nurseries. 

The 2015 data has been combined with the previous years’ data, and results are enclosed.  Bolter data is presented in plants per acre based upon 45,000 plants per acre.  Results for the yield trials from individual sites can be found on the internet.  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 2016; 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 2012’s Sugarbeet Research and Extension Report or 2012’s Official Variety Trial Report. 

These results and additional information for individual growing sites are available on the World Wide Web at www.crystalsugar.com.  More detailed information will be printed later in the Sugarbeet Research and Extension Reports (www.sbreb.org).  Additional data including individual yield trial results and agronomic procedures are also on the ACSC web site. 

Click here to open a pdf file with the following 2015 Grower Info:

  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 2015
  4. Disease ratings for all nurseries (varieties tested in 2015)
  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 2015 Grower Info in Excel Format

Links to 2015 data only follow:

Plot Procedures

Yield trials were planted to stand at 4.5 inches.  Stephen was abandoned due to heavy straw residue which stunted plants.  The Kindred and Cavalier sites had substantial Aphanomyces infection and provided performance information under Aphanomyces conditions.    

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 eleven yield trial sites in 2015 and gave good single seed spacing 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 in a band during the 6-10 leaf stage (14 oz/A since 2004) for Rhizoctonia control.  Incognito/Agri Tin, Proline, and Headline were used for Cercospora control in 2015.  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 ACSC Technical Services Center or your ACSC Agriculture Department.