Table 15. 2020 MG-4E Roundup Ready Disease Tests

Table 15. Yields and disease ratings of 19 Maturity Group IV Early (4.0-4.5) Roundup Ready soybean varieties in 8 County Standard Tests and in small plot trials at one Research and Education Center and one on-farm location in Tennessee during 2020
Summary from County Tests  Summary from Small Plot Research        
Avg.Research & Education Center at Milan (RECM)On-farm Location in Jackson (JAX)
YieldRECM – YLDFrogeyeTargetJAX – YLDFrogeyeTargetOther
MSVariety(bu/ac)*TreatedNon-treatedleaf spotSpot*TreatedNon-treatedleaf spotSpotDiseases
AUSG 7447 XTS71.136.436.3LOWLOW63.855.1LOWLOWSC(HIGH)
ABDyna-Gro S41XS9868.255.451.3MODLOW59.352.3MODLOWCLB
ABCLG Seeds 4227RX67.353.251.6MODLOW51.045.6MODLOWCLB
ABCArmor 42D-2767.053.347.9MODLOW60.551.2MODLOWCLB
BCNK S44-C7X66.556.049.2LOWLOW62.353.6LOWLOWSDS, CLB
BCAsgrow 43X065.952.148.0LOWMOD58.153.4LOWHIGHSC
BCDCredenz 4570X65.450.244.7LOWLOW63.256.1LOWLOWSDS
BCDAgriGold G4318RX65.251.743.4MODMOD57.248.7LOWHIGH
BCDCroplan 4150XS65.247.245.1LOWLOW66.653.9LOWMODSC, CLB
BCDLocal Seed 4407X65.156.348.3LOWLOW65.856.2LOWLOWSDS
BCDCroplan 4520XS65.055.050.1LOWLOW63.056.2LOWLOW
BCDAgriGold G4255RX64.949.148.8LOWMOD54.450.5LOWHIGHSC
BCDDyna-Gro S45XS3764.953.049.4LOWLOW59.054.9LOWLOW
CDECredenz 4280X63.549.342.9LOWLOW57.447.7LOWLOWSDS
CDEArmor 44D-9263.451.550.4LOWMOD58.552.4LOWHIGHSC
CDEDyna-Gro S43XS7063.450.247.3LOWHIGH55.046.8LOWHIGH
CDEProgeny 4265RXS63.150.844.9LOWHIGH57.647.0LOWHIGHSC, SDS
DEProgeny 4444RXS61.445.642.7LOWLOW63.951.1LOWMODSC, SDS
EAsgrow 45X859.652.350.2LOWLOW59.254.3LOWLOWSDS
Average65.151.047.059.851.9
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.   *Treated plots sprayed with Quadris TOP SBX @ 7 oz./Acre + 0.25% Induce @ R3 growth stage. RECM varieties planted June 3, sprayed Aug 12, and harvested Nov 3. JAX varieties planted June 2, sprayed Aug 10, and harvested Oct 14.   LOW, MOD, and HIGH is a relative ranking of disease severity at each location. Other diseases noted: SC=Stem Canker, SDS=Sudden Death Syndrome, CLB=Cercospora leaf blight Disease ratings at RECM: Frogeye leaf spot ranged from 0 – 6% with an average of 2%; Target spot ranged from 0 – 22% with an average of 4%. Disease ratings at JAX: Frogeye leaf spot ranged from 0 – 8% with an average of 2%; and Target spot ranged from 0 – 22% with an average of 6%.   Disease ratings & yield data compiled by Dr. Heather Kelly & Alyson Horner 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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