Table 7. Yields and disease ratings of 8 Maturity Group III 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 2018
Summary from County Tests Summary from Small Plot Research
Average 61.8 55.2 48.3 56.2 51.7 Research and Education Center at Milan (RECM) On-farm Location in Jackson (JAX) RECM – YLD JAX – YLD
MS Variety Avg. Yield (bu/ac) *Treated Non-treated Frogeye leaf spot Target Spot Other Diseases *Treated Non-treated Frogeye leaf spot Target Spot
A AgriGold 3722 66.6 57.1 49.6 LOW MOD CLB 62.1 58.4 LOW LOW
A Asgrow 39X7* 64.5 57.7 43.6 HIGH MOD SC 58.0 50.6 HIGH MOD
AB Asgrow 37X8 63.7 53.7 47.1 MOD MOD SC 51.2 51.0 MOD MOD
ABC Asgrow 36X6* 62.3 56.5 53.6 MOD MOD CLB 59.0 53.0 MOD MOD
BC Asgrow 38X8 60.1 56.8 50.0 LOW HIGH CLB 56.0 51.1 LOW MOD
C Dyna-Gro S39XT08 59.1 54.5 48.4 HIGH MOD SDS 55.3 50.4 HIGH LOW
C NK S39-P5X 59.1 52.8 45.2 MOD LOW CLB, SDS 55.7 55.2 HIGH LOW
C Warren Seed BG 3821 58.9 52.7 48.6 HIGH HIGH SC, CLB 52.4 44.2 HIGH HIGH
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: Chester, Fulton KY, Gibson, Henry, Hickman, Jefferson, 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 – 15% with an average of 6%; Target spot ranged from 0 – 18% with an average of 9%.
Disease ratings at JAX: Frogeye leaf spot ranged from 0 – 9% with an average of 4%; Target spot ranged from 0 – 23% with an average of 10%; other diseases were not rated or noted at this location for this maturity group
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.