Table 28. Yields and disease ratings of 11 Maturity Group V Early (5.0-5.5) 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 2019.
|Summary from County Tests||Summary from Small Plot Research|
|Research & 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||*Treated||Non-treated||Frogeye leaf spot||Target Spot||SDS|
|AB||Local Seed 5386X||62.0||39.5||41.1||LOW||LOW||48.7||44.4||MOD||LOW||LOW|
|AB||Local Seed 5087X**||60.4||37.1||35.6||MOD||LOW||44.1||44.0||MOD||LOW||LOW|
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 21, sprayed Aug 19, and harvested Oct 23.
JAX varieties planted May 28, sprayed Aug 13, and harvested Oct 3.
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 – 19% with an average of 8% and Target spot was only reported on Asgrow 53X0.
Disease ratings at JAX: Frogeye leaf spot ranged from 0 – 17% with an average of 6% and Target spot was only observed on Asgrow 53X0 and SDS disease index ranged from 0 – 20, with an average of 2 disease index.
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.