Table 15. 2020 MG-4E Roundup Ready Disease Tests

Table 15. Yields and disease ratings of 19 Maturity Group IV Early (4.0-4.5) Roundup Ready soybean varieties in 8 County Standard Tests and in small plot trials at one Research and Education Center and one on-farm location in Tennessee during 2020

Summary from County Tests			Summary from Small Plot Research
		Avg.	Research & Education Center at Milan (RECM)				On-farm Location in Jackson (JAX)
		Yield	RECM – YLD		Frogeye	Target	JAX – YLD		Frogeye	Target	Other
MS	Variety	(bu/ac)	*Treated	Non-treated	leaf spot	Spot	*Treated	Non-treated	leaf spot	Spot	Diseases
A	USG 7447 XTS	71.1	36.4	36.3	LOW	LOW	63.8	55.1	LOW	LOW	SC(HIGH)
AB	Dyna-Gro S41XS98	68.2	55.4	51.3	MOD	LOW	59.3	52.3	MOD	LOW	CLB
ABC	LG Seeds 4227RX	67.3	53.2	51.6	MOD	LOW	51.0	45.6	MOD	LOW	CLB
ABC	Armor 42D-27	67.0	53.3	47.9	MOD	LOW	60.5	51.2	MOD	LOW	CLB
BC	NK S44-C7X	66.5	56.0	49.2	LOW	LOW	62.3	53.6	LOW	LOW	SDS, CLB
BC	Asgrow 43X0	65.9	52.1	48.0	LOW	MOD	58.1	53.4	LOW	HIGH	SC
BCD	Credenz 4570X	65.4	50.2	44.7	LOW	LOW	63.2	56.1	LOW	LOW	SDS
BCD	AgriGold G4318RX	65.2	51.7	43.4	MOD	MOD	57.2	48.7	LOW	HIGH
BCD	Croplan 4150XS	65.2	47.2	45.1	LOW	LOW	66.6	53.9	LOW	MOD	SC, CLB
BCD	Local Seed 4407X	65.1	56.3	48.3	LOW	LOW	65.8	56.2	LOW	LOW	SDS
BCD	Croplan 4520XS	65.0	55.0	50.1	LOW	LOW	63.0	56.2	LOW	LOW
BCD	AgriGold G4255RX	64.9	49.1	48.8	LOW	MOD	54.4	50.5	LOW	HIGH	SC
BCD	Dyna-Gro S45XS37	64.9	53.0	49.4	LOW	LOW	59.0	54.9	LOW	LOW
CDE	Credenz 4280X	63.5	49.3	42.9	LOW	LOW	57.4	47.7	LOW	LOW	SDS
CDE	Armor 44D-92	63.4	51.5	50.4	LOW	MOD	58.5	52.4	LOW	HIGH	SC
CDE	Dyna-Gro S43XS70	63.4	50.2	47.3	LOW	HIGH	55.0	46.8	LOW	HIGH
CDE	Progeny 4265RXS	63.1	50.8	44.9	LOW	HIGH	57.6	47.0	LOW	HIGH	SC, SDS
DE	Progeny 4444RXS	61.4	45.6	42.7	LOW	LOW	63.9	51.1	LOW	MOD	SC, SDS
E	Asgrow 45X8	59.6	52.3	50.2	LOW	LOW	59.2	54.3	LOW	LOW	SDS
	Average	65.1	51.0	47.0			59.8	51.9

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.   *Treated plots sprayed with Quadris TOP SBX @ 7 oz./Acre + 0.25% Induce @ R3 growth stage. RECM varieties planted June 3, sprayed Aug 12, and harvested Nov 3. JAX varieties planted June 2, sprayed Aug 10, and harvested Oct 14.   LOW, MOD, and HIGH is a relative ranking of disease severity at each location. Other diseases noted: SC=Stem Canker, SDS=Sudden Death Syndrome, CLB=Cercospora leaf blight Disease ratings at RECM: Frogeye leaf spot ranged from 0 – 6% with an average of 2%; Target spot ranged from 0 – 22% with an average of 4%. Disease ratings at JAX: Frogeye leaf spot ranged from 0 – 8% with an average of 2%; and Target spot ranged from 0 – 22% with an average of 6%.   Disease ratings & yield data compiled by Dr. Heather Kelly & Alyson Horner 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.