Table 15. Yields and disease ratings of 20 Maturity Group IV Early (4.0-4.5) Roundup Ready soybean varieties in 11 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||Other Diseases|
|AB||LG Seeds 4227RX||59.5||51.0||49.9||HIGH||LOW||57.0||51.2||MOD||LOW||SDS|
|AB||Warren Seed BG 4210RR2X**||58.6||47.5||49.2||MOD||LOW||55.7||48.1||MOD||LOW|
|ABC||Terral REV 4310X||57.1||44.8||53.9||LOW||LOW||55.0||50.8||LOW||HIGH|
|ABC||Local Seed LS4299XS||57.0||45.0||49.2||LOW||LOW||51.4||43.6||LOW||HIGH|
|BC||Local Seed 4565X||55.7||51.3||52.9||LOW||LOW||54.8||48.3||LOW||LOW||SDS|
|C||LG Seeds S4420RX||53.8||47.6||50.5||LOW||MOD||53.0||46.3||LOW||MOD|
|C||Warren Seed BG 4510RR2X||53.8||44.5||40.9||LOW||LOW||50.5||46.4||LOW||MOD|
|Terral REV 4679X||–||44.6||46.6||LOW||LOW||57.4||49.3||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 28, sprayed Aug 8, and harvested Oct 2.
JAX varieties planted May 21, sprayed July 31, and harvested Sept 24.
LOW, MOD, and HIGH is a relative ranking of disease severity at each location. Other diseases noted:, SDS=Sudden Death Syndrome; ‘ – ‘ indicate variety was not tested at that location
Disease ratings at RECM: Frogeye leaf spot ranged from 0 – 11% with an average of 2%; Target spot ranged from 0 – 3% with an average of 0.5%
Disease ratings at JAX: Frogeye leaf spot ranged from 0 – 10% with an average of 3%; and Target spot ranged from 0 – 15% with an average of 3%.
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.