Table 22. 2019 MG-4L Roundup Ready Disease Tests

Table 22. Yields and disease ratings of 25 Maturity Group IV Late (4.6-4.9) Roundup Ready soybean varieties in 12 County Standard Tests and in small plot trials at two Research and Education Centers and one on-farm location in Tennessee during 2019.

Summary from County TestsSummary from Small Plot Research       
Research & Education Center at Milan (RECM)West TN Research and Education CenterOn-farm Location in Jackson (JAX)
MSVarietyAvg. Yield (bu/ac)*TreatedNon-treatedFrogeye leaf spotTarget Spot*TreatedNon-treated*TreatedNon-treatedFrogeye leaf spotTarget SpotOther Diseases
ADyna-Gro S48XS56**64.041.542.4LOWLOW18.424.551.046.7LOWLOW
ALG Seeds 4845**
ABAgriGold G4995RX62.644.043.8LOWLOW22.218.548.745.3LOWLOW
ABWarren Seed BG4922RR2X**62.545.745.8LOWLOW19.922.747.441.1LOWLOW
ABUSG 7489XT62.346.237.2LOWLOW22.320.642.043.7LOWLOW
ABLocal Seed LS4999X61.840.343.5LOWLOW47.542.3LOWLOW
ABArmor X48-D2561.647.143.4MODLOW21.219.147.342.9MODLOW
ABAsgrow 48X961.447.349.8LOWLOW24.419.648.940.8LOWLOW
ABUSG 7496XTS**60.942.043.0MODLOW16.820.352.546.9HIGHLOW
ABCDyna-Gro S49XS76**60.542.542.6MODLOW21.826.348.744.6MODLOW
ABCCredenz 4979 X60.441.841.1MODLOW21.
ABCAsgrow 46X6**60.347.844.8LOWLOW21.218.641.841.6LOWLOW
ABCWarren Seed BG4710RR2X60.243.939.3LOWLOW18.216.251.947.5HIGHLOW
ABCTerral REV 4927X**60.043.847.5LOWLOW18.725.047.846.5LOWLOWSDS
ABCProgeny 4816RXS59.742.441.0LOWLOW19.921.745.640.3LOWLOW
ABCDLocal Seed 4798X59.445.645.2LOWLOW21.021.545.642.6LOWLOW
ABCDCroplan 481059.342.543.0LOWMOD24.620.735.933.5LOWHIGHSC
BCDNK S47-Y9X58.843.044.4LOWLOW24.422.747.737.9MODLOW
BCDProgeny 4620RXS58.843.241.3LOWLOW21.418.549.447.8LOWLOW
BCDTerral REV 4679X58.847.246.4LOWLOW22.521.752.443.7LOWLOWSDS
BCDNK S49-F5X58.744.037.4MODLOW21.420.946.941.6MODLOW
BCDAsgrow 49X958.344.449.6LOWLOW19.617.946.744.3LOWLOW
BCDTerral REV 4940X57.743.546.7LOWLOW19.517.252.344.3LOWLOW
CDGoSoy GS49X1955.347.042.0MODLOW19.723.346.642.6HIGHLOWSDS
DCredenz 4869 X54.441.143.8LOWLOW25.918.847.138.2LOWLOW
FLS Susceptible check46.143.0HIGHLOW

YLD= Avg. Yield @ 13% moisture

MS= Varieties that have any MS letter in common are not statistically different in yield at the 5% level of probability.

Varieties denoted with an asterisks (**) or (***) etc. were in the top performing group for consecutive years.  


*Treated plots sprayed with Quadris TOP SBX @ 7 oz./Acre + 0.25% Induce @ R3 growth stage.

RECM varieties planted May 28, sprayed Aug 19, and harvested Oct 23.

JAX planted May 21, sprayed Aug 8, and harvested Oct 3.

WTREC varieties planted after wheat June 17, sprayed Aug 28, and harvested Nov 6.


LOW, MOD, and HIGH is a relative ranking of disease severity at each location. Other diseases noted: SC=Stem Canker, CLB=Cercospora Leaf Blight, SDS=Sudden Death Syndrome;  ‘ – ‘ indicate variety was not tested at that location  

Disease ratings at RECM: Frogeye leaf spot ranged from 0 – 36% with an average of 4%; Target spot was reported on Croplan4810

Disease ratings at JAX: Frogeye leaf spot ranged from 0 – 13% with an average of 4%; Target spot ranged from 0 – 14% with an average of 1%.

Disease ratings at WTREC: Disease pressure was too low (<5%) at this location to take ratings, some yield data were affected by sandy soils and the majority of those data points were discarded.


Disease ratings & yield data compiled by Dr. Heather Kelly from replicated plots at the Research and Education Center at Milan, the West Tennessee Research and Education Center, and on-farm location in Jackson.

County data provided by Ryan Blair, Ext. Area Specialist, and the extension agents.

Virginia Sykes
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