Table 28. 2020 MG-5E Roundup Ready Disease Tests

Table 28. Yields and disease ratings of 9 Maturity Group V Early (5.0-5.5) 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 Diseases
MS	Variety	(bu/ac)	*Treated	Non-treated	leaf spot	Spot	*Treated	Non-treated	leaf spot	Spot
A	Local Seed 5087X	63.3	49.8	46.0	LOW	LOW	56.6	52.6	LOW	LOW	SBS, SDS
AB	NK S53F7X	62.2	46.2	42.5	HIGH	LOW	56.0	52.4	HIGH	LOW
AB	Asgrow 53X9	61.3	48.6	46.9	LOW	LOW	56.2	53.8	LOW	LOW	CLB, SDS
AB	AgriGold G5000RX	61.1	45.1	44.0	MOD	LOW	46.9	45.3	LOW	LOW	SDS
AB	Asgrow 53X0	61.1	47.6	44.7	MOD	LOW	61.3	59.4	LOW	HIGH
AB	Asgrow 52X9	60.5	48.5	43.9	LOW	LOW	64.0	57.9	MOD	LOW
AB	Croplan 5010XS	59.9	48.5	47.2	MOD	LOW	59.0	53.8	LOW	MOD	SBS
AB	GoSoy 52X19S	59.7	43.0	42.7	LOW	LOW	47.7	46.6	LOW	LOW	CLB,SDS,SC
B	Credenz CZ5000X	57.8	43.8	43.7	MOD	LOW	47.6	43.4	LOW	LOW	SBS, SDS
	Average	60.8	46.8	44.6			55.0	51.7

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 22.   LOW, MOD, and HIGH is a relative ranking of disease severity at each location. Other diseases noted: SBS=Septoria brown spot (high levels in non-treated plots), CLB=Cercospora Leaf Blight, SDS=Sudden Death Syndrome, SC=Stem Canker Disease ratings at RECM: Frogeye leaf spot ranged from 0 – 15% with an average of 6% and Target spot ranged from 0 – 2% with an average of 0.5%. Disease ratings at JAX: Frogeye leaf spot ranged from 0 – 29% with an average of 7% and Target spot ranged from 0 – 15% with an average of 3%.   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.