Table 22. 2021 MG-4L Roundup Ready Disease Tests

Table 22. Yields and disease ratings of 16 Maturity Group 4 Late (4.6-4.9) Glyphosate / Dicamaba tolerant soybean varieties in 12 County Standard Tests and 18 varieties in small plot trials at two locations in Tennessee during 2021.

Summary from County TestsSummary from Small Plot Research  
Avg.On-farm Location in Jackson (JAX)Research & Education Center at Milan (RECM)Wheat-beansOther DiseasesSoybean Cyst Nematode
YieldYield (bu/ac)FrogeyeTargetBrownYield (bu/ac)FrogeyeTargetBrownYield (bu/ac)
MSVariety(bu/ac)*TreatedNon-treatedleaf spotspotspot*TreatedNon-treatedleaf spotspotspot*TreatedNon-treated
AArmor A46-F1364.465.653.5MODMODMOD56.552.5LOWNONEMOD33.135.6SDSMR
AUSG 7461XFS63.562.052.5MODLOWMOD50.850.6LOWNONEMOD29.531.1R
ABCBeck’s 4885XF63.062.251.4MODHIGHMOD53.449.5LOWNONEMOD36.232.5MR
ABLocal Seed 4606XS63.064.452.3MODLOWMOD53.352.1LOWNONEMOD38.336.1SDSMR
ABCDDyna-Gro S46XF31S62.762.055.3MODLOWMOD55.052.1LOWNONEMOD34.936.5MR
ABCDEUSG 7489XT62.764.756.6MODNONEMOD52.651.3LOWNONEMOD28.130.3R
ABCDELS4706 GL62.557.641.1HIGHLOWMOD30.634.7
ABCDEProgeny 4816RX62.463.355.8MODNONEMOD53.352.1LOWNONEMOD27.632.2R
ABCDEFDyna-Gro S46XS6061.959.755.6MODMODMOD55.151.9LOWLOWMOD33.534.1MR
ABCDEFArmor A48-F2261.658.441.3HIGHNONEMOD52.944.9MODNONEMOD32.627.3MR
BCDEFGProgeny 4604XFS59.863.152.0MODMODMOD52.453.8LOWNONEMOD31.329.8SDSR
BCDEFGAsgrow 47XF059.760.945.5HIGHLOWMOD51.248.4MODNONEMOD29.431.2R
CDEFGUSG 7491XFS59.458.438.7HIGHLOWMOD51.547.3MODNONEMOD25.820.6SDSR
DEFGLocal Seed 4795XS59.363.053.5MODNONEMOD52.853.5LOWNONEMOD30.632.4MS
EFGDyna-Gro S48XT9059.254.850.4LOWLOWMOD56.454.4NONENONEMOD35.432.1MS
FGAgriGold G4615XF58.660.451.9MODLOWMOD54.155.0LOWNONEMOD35.836.0S
FGAsgrow 48XF058.558.850.8MODLOWMOD53.949.0LOWNONEMOD36.336.4R
FGProgeny 4806XFS58.458.440.3HIGHNONEMOD51.143.6HIGHNONEMOD30.129.2R
GBeck’s 4991X256.260.255.0MODNONEMOD50.348.2LOWNONEMOD22.826.4R
Local Seed 4806XS60.451.3MODLOWMOD55.152.5LOWNONEMOD26.330.6MS
LocalSeed4565XS59.950.3LOWLOWMOD54.455.4NONENONEMOD32.130.7S
Average60.960.950.253.350.931.431.7

Yield adjusted to 13% moisture
MS= Varieties that have any MS letter in common are not statistically different in yield (based on 95% confidence)
*Treated plots sprayed with Miravis Top @13.7 fl oz/a + 0.25% Induce @ R3 growth stage
JAX varieties planted May 24, sprayed Aug. 3, and harvested Oct. 20
RECM varieties planted May 25, sprayed Aug. 2, and harvested Nov. 5
Wheat-beans varieteis planted June 24, sprayed Aug. 27, and harvested Nov. 9
NONE, LOW, MOD, and HIGH is a relative ranking of disease severity at each location. Other diseases noted: SDS = Sudden Death Syndrome
Soybean Cyst Nematode rateds as Resistant (R), Moderately Resistant (MR), Moderately Susceptible (MS), Susceptible (S), or High Susceptible (HS) to HG Type 1.2.5.7/Race 2
Disease ratings at JAX: Frogeye leaf spot ranged from 1 – 61%, averaged 16%; Target spot from 0 – 11%, averaged 2%; Brown spot from 11 – 34%, averaged 20%
Disease ratings at RECM: Frogeye leaf spot ranged from 0 – 18%, averaged 4%; Target spot from 0 – 1%, averaged 0.1%; Brown spot from 11 – 29%, averaged 23%
Disease ratings & yield data compiled by Dr. Heather Kelly, Rachel Guyer, and Wesley Crowder from replicated plots at 2 locations
County data provided by Ryan Blair, Ext. Area Specialist, and County Extension agents
Soybean Cyst Nematode data provided by Dr. Lesley Schumacher, USDA Research Plant Pathologist

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