2017 Official Coded Variety Trials

2017 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 2017 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 very good this year.  10 sites were used for variety approval calculations.  One site was abandoned due to erratic emergence (Casselton) and two were abandoned due to soil compaction (Humboldt and Argyle).  Rhizoctonia was less prevalent in 2017 yet showed an increase from 2016 in yield trials. Seed treatments and two applications of Quadris were used to control Rhizoctonia. Based upon susceptible plot observations, root aphids had only a slight effect on varieties in 2017.  Preliminary root aphid evaluations are in progress, but seed companies may know tolerance levels of their varieties.  Revenue calculations in 2017 are based on a hypothetical $48.49 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 Michigan with the USDA.  Lack of Aphanomyces pressure at any of the OVT sites prevented collection of Aphanomyces Yield Data for 2017.   The Aphanomyces ratings are from Shakopee.  The Cercospora data is from Foxhome, MN; Randolph, MN; and Michigan USDA.  Rhizoctonia and Fusarium ratings were optional prior to 2016, so some varieties do not have three year ratings.  Some varieties were omitted from the Rhizoctonia and Fusarium nurseries in 2015. 

The 2017 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 are available on the internet.

Eighteen conventional varieties are approved for sale in 2018 based upon one year of data.  Three conventional varieties were previously approved and have data from previous years in the 2012 Sugarbeet Research and Extension Report and 2012 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. 

The ACSC official variety trial program attempts to utilize multiple disease nurseries each year to provide consistency to the disease ratings.  In 2017, the disease ratings for Aphanomyces (Shakopee) and Rhizoctonia (Michigan) were limited to a single location due to lack of disease pressure in the RRV.  Consider reviewing all available disease ratings when evaluating variety performance. 

Click here to open a pdf file with the following 2017 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
  4. Performance of conventional varieties from six sites in 2017
  5. Disease ratings for all nurseries (varieties tested in 2017)
  6. Trial sites, disease observations and agronomic information from all trial locations
  7. Seed treatments applied to seed used in the official coded variety trials

Download 2017 Grower Info in Excel Format

Links to 2017 data only follow:

Plot Procedures

Yield trials were planted to stand at 4.5 inches. 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. Planting was performed with a 12-row SRES vacuum planter. The GPS controlled planter gave good single seed spacing which facilitated emergence counting. Seed companies had the option of treating seed with Tachigaren, insecticide and a Rhizoctonia seed treatment fungicide. Emergence counts were taken on 24 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. The micro rate program was used on conventional trials. All yield trials were treated with Quadris in a band during the 2 leaf (9 oz) and 6-10 leaf stage (14 oz) for Rhizoctonia control. Inspire XT/Penncozeb, Agri Tin/Incognito, Penncozeb, and Headline/Agri Tin were used for Cercospora control in 2017. 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.