Table 22. 2021 MG-4L Roundup Ready Disease Tests

Table 22. Yields and disease ratings of 16 Maturity Group 4 Late (4.6-4.9) Glyphosate / Dicamaba tolerant soybean varieties in 12 County Standard Tests and 18 varieties 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)					Wheat-beans		Other Diseases	Soybean Cyst Nematode
		Yield	Yield (bu/ac)		Frogeye	Target	Brown	Yield (bu/ac)		Frogeye	Target	Brown	Yield (bu/ac)
MS	Variety	(bu/ac)	*Treated	Non-treated	leaf spot	spot	spot	*Treated	Non-treated	leaf spot	spot	spot	*Treated	Non-treated
A	Armor A46-F13	64.4	65.6	53.5	MOD	MOD	MOD	56.5	52.5	LOW	NONE	MOD	33.1	35.6	SDS	MR
A	USG 7461XFS	63.5	62.0	52.5	MOD	LOW	MOD	50.8	50.6	LOW	NONE	MOD	29.5	31.1		R
ABC	Beck’s 4885XF	63.0	62.2	51.4	MOD	HIGH	MOD	53.4	49.5	LOW	NONE	MOD	36.2	32.5		MR
AB	Local Seed 4606XS	63.0	64.4	52.3	MOD	LOW	MOD	53.3	52.1	LOW	NONE	MOD	38.3	36.1	SDS	MR
ABCD	Dyna-Gro S46XF31S	62.7	62.0	55.3	MOD	LOW	MOD	55.0	52.1	LOW	NONE	MOD	34.9	36.5		MR
ABCDE	USG 7489XT	62.7	64.7	56.6	MOD	NONE	MOD	52.6	51.3	LOW	NONE	MOD	28.1	30.3		R
ABCDE	LS4706 GL	62.5	57.6	41.1	HIGH	LOW	MOD	–	–	–	–	–	30.6	34.7
ABCDE	Progeny 4816RX	62.4	63.3	55.8	MOD	NONE	MOD	53.3	52.1	LOW	NONE	MOD	27.6	32.2		R
ABCDEF	Dyna-Gro S46XS60	61.9	59.7	55.6	MOD	MOD	MOD	55.1	51.9	LOW	LOW	MOD	33.5	34.1		MR
ABCDEF	Armor A48-F22	61.6	58.4	41.3	HIGH	NONE	MOD	52.9	44.9	MOD	NONE	MOD	32.6	27.3		MR
BCDEFG	Progeny 4604XFS	59.8	63.1	52.0	MOD	MOD	MOD	52.4	53.8	LOW	NONE	MOD	31.3	29.8	SDS	R
BCDEFG	Asgrow 47XF0	59.7	60.9	45.5	HIGH	LOW	MOD	51.2	48.4	MOD	NONE	MOD	29.4	31.2		R
CDEFG	USG 7491XFS	59.4	58.4	38.7	HIGH	LOW	MOD	51.5	47.3	MOD	NONE	MOD	25.8	20.6	SDS	R
DEFG	Local Seed 4795XS	59.3	63.0	53.5	MOD	NONE	MOD	52.8	53.5	LOW	NONE	MOD	30.6	32.4		MS
EFG	Dyna-Gro S48XT90	59.2	54.8	50.4	LOW	LOW	MOD	56.4	54.4	NONE	NONE	MOD	35.4	32.1		MS
FG	AgriGold G4615XF	58.6	60.4	51.9	MOD	LOW	MOD	54.1	55.0	LOW	NONE	MOD	35.8	36.0		S
FG	Asgrow 48XF0	58.5	58.8	50.8	MOD	LOW	MOD	53.9	49.0	LOW	NONE	MOD	36.3	36.4		R
FG	Progeny 4806XFS	58.4	58.4	40.3	HIGH	NONE	MOD	51.1	43.6	HIGH	NONE	MOD	30.1	29.2		R
G	Beck’s 4991X2	56.2	60.2	55.0	MOD	NONE	MOD	50.3	48.2	LOW	NONE	MOD	22.8	26.4		R
	Local Seed 4806XS		60.4	51.3	MOD	LOW	MOD	55.1	52.5	LOW	NONE	MOD	26.3	30.6		MS
	LocalSeed4565XS		59.9	50.3	LOW	LOW	MOD	54.4	55.4	NONE	NONE	MOD	32.1	30.7		S
	Average	60.9	60.9	50.2				53.3	50.9				31.4	31.7

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 Aug. 3, and harvested Oct. 20
RECM varieties planted May 25, sprayed Aug. 2, and harvested Nov. 5
Wheat-beans varieteis planted June 24, sprayed Aug. 27, and harvested Nov. 9
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 1 – 61%, averaged 16%; Target spot from 0 – 11%, averaged 2%; Brown spot from 11 – 34%, averaged 20%
Disease ratings at RECM: Frogeye leaf spot ranged from 0 – 18%, averaged 4%; Target spot from 0 – 1%, averaged 0.1%; Brown spot from 11 – 29%, averaged 23%
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