Table 9. Yields and disease ratings of seven Maturity Group III Roundup Ready Xtend soybean varieties in three County Standard Tests and in small plot trials at two locations in Tennessee during 2021.
| Summary from County Tests | Summary from Small Plot Research | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg. | On-farm Location in Jackson (JAX) | Research & Education Center at Milan (RECM) | Soybean | |||||||||||
| Yield | Yield (bu/ac) | Frogeye | Target | Brown | Yield (bu/ac) | Frogeye | Target | Brown | Other | Cyst | ||||
| MS | Variety | (bu/ac) | *Treated | Non-treated | leaf spot | spot | spot | *Treated | Non-treated | leaf spot | spot | spot | Diseases | Nematode |
| A | AgriGold G3722RF*** | 58.1 | 49.2 | 47.7 | NONE | HIGH | LOW | 57.3 | 53.1 | NONE | MOD | MOD | MR | |
| AB | Asgrow 38XF1 | 57.6 | 44.7 | 44.9 | NONE | MOD | LOW | 57.9 | 51.5 | NONE | HIGH | MOD | R | |
| AB | NK 39-A1XF | 56.0 | 44.6 | 37.5 | HIGH | HIGH | LOW | 51.8 | 45.5 | MOD | HIGH | LOW | R | |
| AB | Asgrow 36XF1 | 55.5 | 46.3 | 43.1 | MOD | MOD | LOW | 56.9 | 50.3 | LOW | MOD | MOD | R | |
| ABC | Local Seed LS3908XFS | 54.2 | 51.9 | 50.1 | LOW | NONE | LOW | 56.4 | 55.1 | NONE | LOW | HIGH | R | |
| BC | Asgrow 37XF1 | 50.1 | 41.0 | 37.3 | LOW | HIGH | LOW | 53.1 | 49.1 | LOW | MOD | LOW | R | |
| C | AgriGold G3630XF | 47.5 | 38.9 | 33.6 | MOD | LOW | LOW | 55.8 | 50.5 | MOD | NONE | HIGH | SDS | R |
| Average | 54.1 | 45.2 | 42.0 | 55.6 | 50.7 | |||||||||
Yield adjusted to 13% moisture
MS= Varieties that have any MS letter in common are not statistically different in yield (based on 95% confidence)
*Treated plots sprayed with Miravis Top @13.7 fl oz/a + 0.25% Induce @ R3 growth stage
JAX varieties planted May 24, sprayed July 27, and harvested Oct. 19
RECM varieties planted May 25, sprayed July 26, and harvested Oct. 11
NONE, LOW, MOD, and HIGH is a relative ranking of disease severity at each location. Other diseases noted: SDS = Sudden Death Syndrome
Soybean Cyst Nematode rateds as Resistant (R), Moderately Resistant (MR), Moderately Susceptible (MS), Susceptible (S), or High Susceptible (HS) to HG Type 1.2.5.7/Race 2
Disease ratings at JAX: Frogeye leaf spot ranged from 0 – 13%, averaged 3%; Target spot from 0 – 14%, averaged 7%; Brown spot from 10 – 17%, averaged 13%
Disease ratings at RECM: Frogeye leaf spot ranged from 0 – 9%, averaged 2%; Target spot from 0 – 19%, averaged 10%; Brown spot from 7 – 21%, averaged 13%
Disease ratings & yield data compiled by Dr. Heather Kelly, Rachel Guyer, and Wesley Crowder from replicated plots at 2 locations
County data provided by Ryan Blair, Ext. Area Specialist, and County Extension agents
Soybean Cyst Nematode data provided by Dr. Lesley Schumacher, USDA Research Plant Pathologist
Virginia Sykes vsykes@utk.edu
- Table 1. 2021 Total entry numbers - December 26, 2021
- Table A-35. Mean yields and agronomic data from Memphis, TN, MG-5 - December 23, 2021
- Table A-34. Mean yields and agronomic data from Jackson, TN, MG-5 - December 22, 2021