Table 22. 2019 MG-4L Roundup Ready Disease Tests

Table 22. Yields and disease ratings of 25 Maturity Group IV Late (4.6-4.9) Roundup Ready soybean varieties in 12 County Standard Tests and in small plot trials at two Research and Education Centers and one on-farm location in Tennessee during 2019.

Summary from County Tests			Summary from Small Plot Research
			Research & Education Center at Milan (RECM)				West TN Research and Education Center		On-farm Location in Jackson (JAX)
			RECM – YLD				WTREC – YLD		JAX – YLD
MS	Variety	Avg. Yield (bu/ac)	*Treated	Non-treated	Frogeye leaf spot	Target Spot	*Treated	Non-treated	*Treated	Non-treated	Frogeye leaf spot	Target Spot	Other Diseases
A	Dyna-Gro S48XS56**	64.0	41.5	42.4	LOW	LOW	18.4	24.5	51.0	46.7	LOW	LOW
A	LG Seeds 4845**	64.0	42.0	44.8	LOW	LOW	23.9	21.4	47.4	40.8	LOW	LOW
AB	AgriGold G4995RX	62.6	44.0	43.8	LOW	LOW	22.2	18.5	48.7	45.3	LOW	LOW
AB	Warren Seed BG4922RR2X**	62.5	45.7	45.8	LOW	LOW	19.9	22.7	47.4	41.1	LOW	LOW
AB	USG 7489XT	62.3	46.2	37.2	LOW	LOW	22.3	20.6	42.0	43.7	LOW	LOW
AB	Local Seed LS4999X	61.8	40.3	43.5	LOW	LOW	–	–	47.5	42.3	LOW	LOW
AB	Armor X48-D25	61.6	47.1	43.4	MOD	LOW	21.2	19.1	47.3	42.9	MOD	LOW
AB	Asgrow 48X9	61.4	47.3	49.8	LOW	LOW	24.4	19.6	48.9	40.8	LOW	LOW
AB	USG 7496XTS**	60.9	42.0	43.0	MOD	LOW	16.8	20.3	52.5	46.9	HIGH	LOW
ABC	Dyna-Gro S49XS76**	60.5	42.5	42.6	MOD	LOW	21.8	26.3	48.7	44.6	MOD	LOW
ABC	Credenz 4979 X	60.4	41.8	41.1	MOD	LOW	21.1	18.1	44.0	46.9	HIGH	LOW	CLB
ABC	Asgrow 46X6**	60.3	47.8	44.8	LOW	LOW	21.2	18.6	41.8	41.6	LOW	LOW
ABC	Warren Seed BG4710RR2X	60.2	43.9	39.3	LOW	LOW	18.2	16.2	51.9	47.5	HIGH	LOW
ABC	Terral REV 4927X**	60.0	43.8	47.5	LOW	LOW	18.7	25.0	47.8	46.5	LOW	LOW	SDS
ABC	Progeny 4816RXS	59.7	42.4	41.0	LOW	LOW	19.9	21.7	45.6	40.3	LOW	LOW
ABCD	Local Seed 4798X	59.4	45.6	45.2	LOW	LOW	21.0	21.5	45.6	42.6	LOW	LOW
ABCD	Croplan 4810	59.3	42.5	43.0	LOW	MOD	24.6	20.7	35.9	33.5	LOW	HIGH	SC
BCD	NK S47-Y9X	58.8	43.0	44.4	LOW	LOW	24.4	22.7	47.7	37.9	MOD	LOW
BCD	Progeny 4620RXS	58.8	43.2	41.3	LOW	LOW	21.4	18.5	49.4	47.8	LOW	LOW
BCD	Terral REV 4679X	58.8	47.2	46.4	LOW	LOW	22.5	21.7	52.4	43.7	LOW	LOW	SDS
BCD	NK S49-F5X	58.7	44.0	37.4	MOD	LOW	21.4	20.9	46.9	41.6	MOD	LOW
BCD	Asgrow 49X9	58.3	44.4	49.6	LOW	LOW	19.6	17.9	46.7	44.3	LOW	LOW
BCD	Terral REV 4940X	57.7	43.5	46.7	LOW	LOW	19.5	17.2	52.3	44.3	LOW	LOW
CD	GoSoy GS49X19	55.3	47.0	42.0	MOD	LOW	19.7	23.3	46.6	42.6	HIGH	LOW	SDS
D	Credenz 4869 X	54.4	41.1	43.8	LOW	LOW	25.9	18.8	47.1	38.2	LOW	LOW
	FLS Susceptible check	–	46.1	43.0	HIGH	LOW	–	–	–	–	–	–
	Average	59.9	44.1	43.6			21.4	20.5	47.2	42.8

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 19, and harvested Oct 23.

JAX planted May 21, sprayed Aug 8, and harvested Oct 3.

WTREC varieties planted after wheat June 17, sprayed Aug 28, and harvested Nov 6.

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 – 36% with an average of 4%; Target spot was reported on Croplan4810

Disease ratings at JAX: Frogeye leaf spot ranged from 0 – 13% with an average of 4%; Target spot ranged from 0 – 14% with an average of 1%.

Disease ratings at WTREC: Disease pressure was too low (<5%) at this location to take ratings, some yield data were affected by sandy soils and the majority of those data points were discarded.

Disease ratings & yield data compiled by Dr. Heather Kelly from replicated plots at the Research and Education Center at Milan, the West Tennessee Research and Education Center, and on-farm location in Jackson.

County data provided by Ryan Blair, Ext. Area Specialist, and the extension agents.