Seed Treatments for Management of Soybean Cyst Nematode, , in Mid-Atlantic Soybean Production

Treatment Name	Product Name	Active Ingredient (AI)	Application Rate	Mode of Action	Group
Nontreated^1,2	n/a	n/a	n/a	n/a	n/a
Fungicide + Insecticide base²	Allegiance FLStaminaSystiva XS XemiumPoncho 600	MetalaxylPyraclostrobinFluxapyroxadClothianidin	4 g a/100 kg7.5 g a/100 kg5 g a/100 kg0.11 mg a/seed	PAQoISDHInAChR	Group 4Group 11Group 7Group 4(A)
Saltro¹ + base²	Saltro®	Pydiflumetofan	0.075 mg a/seed	SDHI	–
ILEVO¹ + base²	ILEVO®	Fluopyram	0.15 mg a/seed	SDHI	N-3
Clariva + base²	Clariva^®pn	P. nishizawae	130 ml/100 kg	Biologic	N-UNB
Trunemco + base²	Trunemco™	B. amyloliquefaciens cis–jasmone	20.2 ml/100 kg	Biologic	N-UNB
Aveo EZ + base²	Aveo™ EZ	B. amyloliquefaciens strain PTA-4838	2 ml/100,000 seeds	Biologic	N-UNB
BioST + base²	BioST^®Nematicide100	Burkholderia rinojenses	195 ml/100 kg	Biologic	N-UNB

Year	Location	Experiment	Planting Date	Harvest Date	Previous Crop	Irrigation^z	Sampling Date for SCN		Date of SCN Female Count	Initial SCN Count^y

							At Planting	End of Season
2020	Georgetown, DE	1	19 Apr	22 Oct	Soybean	Yes	19 Apr	14 Sept	16 Jun	936
2021	Georgetown, DE	1	27 Apr	5 Nov	Soybean	Yes	27 Apr	27 Aug	3 Jun	61
2021	Queenstown, MD	1	4 Jun	12 Nov	Corn	No	18 May	1 Sept	7 Jul	31
2020	Georgetown, DE	2	19 Apr	22 Oct	Soybean	Yes	19 Apr	6 Oct	15 Jun	34263
2021	Georgetown, DE	2	27 Apr	5 Nov	Soybean	Yes	27 Apr	13 Sept	3 Jun	3917

Trial Information	% Emergence 14 DAP^z	% Emergence 28 DAP	Rf^y	Transformed Rf^x	Root female counts	Females per gram of root	Yield(kg/ha)	Yield difference from nontreated seed (kg/ha)
2020, Georgetown
Nontreated	26.2c	54.0b	0.6	−0.33	189.0a	19.1a	2125.1	–
Saltro	54.3b	90.5a	0.2	−0.67	179.2a	23.9a	2313.4	+188.3
ILEVO	70.0a	86.4a	0.2	−0.83	53.8b	5.4b	2447.9	+322.8
p-value	0.0001	0.0001	ns	ns	0.03	0.01	ns
2021, Georgetown
Nontreated	53.3c	56.8c	7.6	0.19	531.6	125.8	2838	–
Saltro	82.4a	85.5a	3.6	0.75	473.4	94.8	3275.1	+437.1
ILEVO	68.9b	79.5b	6.6	0.69	482.2	115.3	3281.9	+443.9
p-value	<0.001	0.0001	ns	ns	ns	ns	ns
2021, Queenstown
Nontreated	53.3c	56.8b	76.17	0.74	1.6	0.1	4848.8	–
Saltro	82.5	85.5a	46.2	1.91	2.6	0.1	4815.2	−33.6
ILEVO	68.9a	79.5a	8.51	−0.06	0.8	0.05	4909.3	+60.5
p-value	<0.001	<0.0001	ns	ns	ns	ns	ns

Trial Information	% Emergence 14 DAP^z	% Emergence 28 DAP	Rf^y	Transformed Rf^x	Root female counts	Females per gram of root	Yieldkg/ha	Yield difference from base seed treatment (kg/ha)
Georgetown, 2020
Nontreated	74.6	na	0.5	−0.40	239	40.5	2353.8	+316.1
Fungicide + Insecticide Base	73.1	na	0.6	−0.29	380	57.7	2037.7	−
BioST	70.6	na	0.5	−0.39	323	46.8	2454.6	+416.9
Aveo + Base	75.4	na	0.7	−0.37	270.8	39.2	2528.6	+490.9
Clariva + Base	76.2	na	0.4	−0.40	290.7	37.8	2750.5	+712.8
ILEVO + Base	77.0	na	0.7	−0.25	200.8	34.6	2219.3	+181.6
Trunemco + Base	76.0	na	0.6	−0.29	292.0	43.9	2313.4	+257.7
Saltro + Base	77.7	na	0.6	−0.30	333.0	50.0	2084.8	+47.1
p-value	ns	na	ns	ns	ns	ns	ns
Georgetown, 2021
Nontreated	47.3c	48.51c	6.8	0.77	341.5	55.6	2885.1 d	−416.9
Fungicide + Insecticide Base	69.9ab	76.07ab	6.4	0.78	450.8	71.5	3302 b	−
BioST	69.2ab	74.4ab	8.4	0.84	392.7	52.1	3328.9 b	+26.9
Aveo + Base	70.3ab	78.8a	6.4	0.78	394.9	55.4	3059.9 c	−242.1
Clariva + Base	76.1a	78.7a	6.9	0.79	428.8	62.9	3080.1 c	−221.9
ILEVO + Base	68.0ab	74.0ab	8.0	0.82	202.8	36.5	3402.9 b	+100.9
Trunemco + Base	73.5ab	76.6ab	8.7	0.90	276.2	44.0	3295.3 b	−6.7
Saltro + Base	66.9b	72.5b	6.9	0.80	305.5	46.3	3813.1 a	+511.1
p-value	<0.0001	<0.0001	ns	ns	ns	ns	0.0005

Seed Treatments for Management of Soybean Cyst Nematode, Heterodera glycines, in Mid-Atlantic Soybean Production