Table 17. Yields and disease ratings of 19 Early Maturity Group IV (4.0 – 4.5) Roundup Ready soybean varieties in 15 County Standard Tests and in small plot trials at two Research and Education Centers and one on-farm location in Tennessee during 2016.

//////Table 17. Yields and disease ratings of 19 Early Maturity Group IV (4.0 – 4.5) Roundup Ready soybean varieties in 15 County Standard Tests and in small plot trials at two Research and Education Centers and one on-farm location in Tennessee during 2016.
Summary from 15 County TestsSummary from Small Plot Research
Average (bu/a)63.052.347.347.142.058.356.3
RECM - Moderate Disease PresssureJAX - Severe Disease PressureWTREC - After Wheat (Low-Mod Disease Pressure)
MSBrand/VarietyAvg Yld bu/aRECM - YLD *TreatedRECM - YLD Non-treatedFrogeye leaf spotBrown spotTarget spotOther DiseasesJAX - YLD *TreatedJAX - YLD Non-treatedFrogeye leaf spotOther DiseasesWTREC - YLD *TreatedWTREC - YLD Non-treatedFrogeye leaf spotBrown spotTarget spotOther Diseases
A*Mycogen 5N433R266.953.548.6MODHIGHLOW50.541.6MODBS61.658.2MODMODLOW
ABBayer CZ 418166.056.650.2HIGHHIGHMOD49.945.5MODBS56.956.4MODMODLOWCLB
AB***Dyna-Gro 31RY4565.353.945.7LOWMODHIGHSDS48.445.5LOWBS, TS60.860.2MODLOWMODCLB
ABBeck's 453R465.055.152.2LOWMODLOWSDS51.448.8LOWBS62.561.3LOWMODLOW
AB*Dyna-Gro S43RY9564.752.047.1MODHIGHLOW46.843.4MODBS60.058.9MODMODLOW
AB*Warren Seed DS434064.749.344.2MODHIGHMODCLB, SC44.039.8HIGHBS60.356.7MODMODMODCLB
AB**Mycogen 5N452R264.252.149.5LOWHIGHLOWSC47.645.2LOWBS59.460.7LOWMODLOW
ABProgeny P4211RY63.951.744.9HIGHHIGHMODCLB, SC42.539.1HIGHBS63.359.5MODLOWLOWCLB
ABNK S42-P663.854.447.6LOWMODLOW59.051.0LOWBS,TS57.854.3LOWHIGHLOW
ABTerral 45A4663.553.752.4MODHIGHLOW52.343.4MODBS62.455.6LOWMODLOWCLB
ABSteyer 4402R263.454.151.0MODHIGHLOW50.844.0MODBS60.952.1MODMODLOWCLB
ABNK S45-R763.457.952.0MODHIGHLOW53.245.8HIGHBS48.454.7MODHIGHLOW
ABWarren Seed DS422563.051.543.6MODMODHIGH39.734.5LOWBS, TS60.657.3LOWMODHIGH
BBayer CZ 459062.855.448.8MODMODLOW48.641.6MODBS59.956.3MODLOWLOWCLB
BCroplan R2C 400062.651.047.8HIGHHIGHLOW46.243.1HIGHBS53.950.0MODMODLOW
BCArmor 44-R0862.349.043.4HIGHHIGHMODSC39.738.0HIGHBS58.156.6MODMODLOWCLB
CDCroplan R2C 434558.655.045.4HIGHMODLOW39.733.3HIGHBS59.356.4HIGHLOWLOWCLB
DEBeck's 433R257.948.942.7LOWHIGHHIGH40.436.4LOWBS52.752.9MODMODHIGHCLB
EProgeny 458854.437.840.7LOWHIGHMOD44.137.8LOWBS, TS, CLB48.052.1LOWMODMODCLB

 

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.

County locations include: Cannon, Crockett, Dyer, Franklin, Gibson, Giles, Hardeman, Henry, Obion, Perry, Trousdale (KY), Warren, Weakley, Ballard (KY), Calloway (KY)

 

*Treated plots sprayed with Quadris TOP @ 8 oz./Acre + 1% Induce @ R3-R4 growth stage. RECM varieties planted June 1, JAX planted May 23, and WTREC planted June 13 after wheat

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 – 56% with an average of 12%; Brown spot ranged from 23 – 65% with an average of 39%; and Target spot ranged from 0 – 23% with an average of 5%.

Disease ratings at JAX: Frogeye leaf spot ranged from 1 – 63% with an average of 20%; Brown spot and Target spot were only rated as present or absent (noted in ‘Other Diseases’ column)

Disease ratings at WTREC: Frogeye leaf spot ranged from 0 – 21% with an average of 5%; Brown spot ranged from 15 – 35% with an average of 22%; and Target spot ranged from 0 – 13% with an average of 2%.  Lodging was recorded for a plot if >50% of the plants were leaning at angle ≥ 45° and is reported on a 0 to 4 scale based on the 4 replicate plots for each variety (e.g. 4=4 of 4 plots, 3=3 of 4 plots, etc.)

 

Disease ratings & yield data compiled by Dr. Heather Kelly from replicated plots at the Research and Education Center at Milan (RECM, which is irrigated and had moderate disease pressure), on-farm location in Jackson (JAX, which is dry land and had severe disease pressure), and the West Tennessee Research and Education Center (WTREC, which was planted after wheat, is dry land and had low to moderated disease pressure due to regular crop rotation). County data provided by Ryan Blair, Ext. Area Specialist, and the extension agents.

2017-05-23T19:49:35+00:00