Table 28. Yields and disease ratings of 9 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 2020
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 22.
LOW, MOD, and HIGH is a relative ranking of disease severity at each location. Other diseases noted: SBS=Septoria brown spot (high levels in non-treated plots), CLB=Cercospora Leaf Blight, SDS=Sudden Death Syndrome, SC=Stem Canker
Disease ratings at RECM: Frogeye leaf spot ranged from 0 – 15% with an average of 6% and Target spot ranged from 0 – 2% with an average of 0.5%.
Disease ratings at JAX: Frogeye leaf spot ranged from 0 – 29% with an average of 7% and Target spot ranged from 0 – 15% with an average of 3%.
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.
|Summary from County Tests||Summary from Small Plot Research|
|Avg.||Research & Education Center at Milan (RECM)||On-farm Location in Jackson (JAX)|
|Yield||RECM – YLD||Frogeye||Target||JAX – YLD||Frogeye||Target||Other Diseases|
|MS||Variety||(bu/ac)||*Treated||Non-treated||leaf spot||Spot||*Treated||Non-treated||leaf spot||Spot|
|A||Local Seed 5087X||63.3||49.8||46.0||LOW||LOW||56.6||52.6||LOW||LOW||SBS, SDS|
|AB||Asgrow 53X9||61.3||48.6||46.9||LOW||LOW||56.2||53.8||LOW||LOW||CLB, SDS|
|B||Credenz CZ5000X||57.8||43.8||43.7||MOD||LOW||47.6||43.4||LOW||LOW||SBS, SDS|
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