Table 9. 2019 MG-3 Roundup Ready Disease Tests

Table 9. Yields and disease ratings of 10 Maturity Group III Roundup Ready soybean varieties in 9 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 TestsSummary from Small Plot Research
Average66.552.050.353.846.6
.Research and Education Center at Milan (RECM)On-farm Location in Jackson (JAX)
RECM – YLDJAX – YLD
MSVarietyAvg Yield (bu/ac)*TreatedNon-treatedFrogeye leaf spotTarget SpotOther Diseases*TreatedNon-treatedFrogeye leaf spotTarget Spot
AAsgrow 37X9***71.556.954.8MODLOW53.545.7MODLOW
ABLocal Seed 397669.850.949.9HIGHLOWSDS59.155.8HIGHLOW
ABCCroplan 395069.253.247.6HIGHLOWSDS54.248.3HIGHLOW
ABCDNK S39-G2X67.853.951.5MODHIGH52.344.2MODMOD
ABCDAgriGold G3722RX**67.251.149.2LOWMOD55.945.7LOWMOD
BCDEAsgrow 39X765.452.950.2MODHIGH51.942.4MODHIGH
CDEAgriGold G3850RX64.549.452.1LOWMOD51.848.4MODMOD
DEAsgrow 36X664.550.649.1MODHIGH53.446.3HIGHHIGH
DEAsgrow 38X863.857.651.0LOWHIGH53.143.3LOWMOD
EWarren Seed BG 3701 RR2X61.643.447.4LOWMOD53.145.9LOWMOD

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 varieteis planted May 21, sprayed July 24, 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 – 15% with an average of 6%;  Target spot ranged from 0 – 21% with an average of 8%.  

Disease ratings at JAX: Frogeye leaf spot ranged from 0 – 4% with an average of 2%; Target spot ranged from 0 – 14% with an average of 4%;  

 

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.

Virginia Sykes

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