Table 13. 2018 MG-4E Roundup Ready Disease Tests

Table 13. Yields and disease ratings of 24 Maturity Group IV Early (4.0-4.5) Roundup Ready soybean varieties in 10 County Standard Tests and in small plot trials at one Research and Education Center and one on-farm location in Tennessee during 2018

Summary from County TestsSummary from Small Plot Research
Average61.350.246.551.746.6
Research and Education Center at Milan (RECM)On-farm Location in Jackson (JAX)
RECM – YLDJAX – YLD
MSVarietyAvg. Yield (bu/ac)*TreatedNon-treatedFrogeye leaf spotTarget SpotOther Diseases*TreatedNon-treatedFrogeye leaf spotTarget Spot
ALocal Seed 456564.552.952.2LOWLOWSDS, CLB54.645.9LOWLOW
ATerral REV 44X263.756.150.2LOWMODSC, SDS56.248.3LOWHIGH
ABWarren Seed BG 421063.351.649.9HIGHLOWSDS, CLB56.148.2MODLOW
ABAsgrow 43X863.249.546.5MODLOWSDS, CLB48.049.2MODLOW
ABArmor 42D2763.053.848.9HIGHLOW
ABCAsgrow 43X762.947.645.7LOWMODSDS, CLB, SC46.444.6LOWMOD
ABCDTerral REV 42X362.551.347.1LOWLOWSDS54.548.4LOWLOW
ABCDNK S42-B9XS61.849.743.6HIGHLOWSDS, CLB58.551.9HIGHLOW
ABCDEAsgrow 44X661.746.442.5MODLOWCLB48.144.9MODLOW
ABCDEProgeny 444461.752.847.3LOWLOW47.444.2LOWMOD
ABCDECroplan 4500S61.556.047.3LOWLOWSDS, SC46.044.9LOWMOD
ABCDELocal Seed 445861.547.945.3LOWLOWSC (HIGH), CLB53.152.0LOWLOW
ABCDEBeck’s 4119X261.353.049.6HIGHLOWSDS, CLB51.251.8HIGHLOW
ABCDEWarren Seed BG 432261.3SDS, SC51.848.6MODLOW
ABCDEWarren Seed BG 451061.151.252.4LOWMODSC, CLB55.144.4LOWHIGH
ABCDEAgriGold 419060.853.250.4HIGHLOWCLB55.944.4HIGHLOW
ABCDEDyna-Gro S43XS2760.841.738.2HIGHLOWSC (HIGH)45.845.4MODLOW
ABCDEAgriGold 457960.753.150.4LOWMODSDS, CLB50.945.3LOWMOD
ABCDEAsgrow 45X860.655.747.5MODLOWSDS, CLB50.441.3LOWLOW
ABCDEUSG 744760.245.441.4MODLOWSC (HIGH), CLB51.342.0MODLOW
BCDELG 422759.051.847.3HIGHLOWCLB54.647.6HIGHLOW
CDEBeck’s 4453X258.348.743.9LOWLOWSC, CLB51.045.1LOWLOW
DECroplan 431658.137.536.0MODLOWSC (HIGH), SDS47.648.1MODLOW
EArmor 44D4057.151.448.1LOWLOWSC, CLB52.644.0LOWLOW

YLD= Avg. Yield @ 15% 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.

County locations include: Cannon, Calloway KY, Chester, Fulton KY, Gibson, Henry, Lake, Lauderdale, Madison, Weakley

*Treated plots sprayed with Quadris TOP SBX @ 7 oz./Acre + 0.25% Induce @ R3 growth stage. RECM varieties planted June 5 and JAX planted June 14

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 – 9% with an average of 3%; Target spot ranged from 0 -4% with an average of 1%

Disease ratings at JAX: Frogeye leaf spot ranged from 1 – 11% with an average of 3%; and Target spot ranged from 0 – 15% with an average of 2%.

Disease ratings & yield data compiled by Dr. Heather Kelly from replicated plots at the Research and Education Center at Milan 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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