Table 3. Soybean injury, weed control, weed control program costs, soybean yield, and gross margins for 26 herbicide programs

Herbicide Programs	Soybean Injury (%)	SETFA, CHEAL, AMARE, BRAKA, SOLPT (>90%)	AMBEL (%)	ABUTH (%)	All Weeds (>90%)	Costs^1 ($/A)	Yield (bu/A)	Gross Margins^2 ($/A)
PRE(Conventional)
Outlook + Lorox + Sencor	0	+	74	87	NO	$50.28	60.4	$251.72
Axiom + Pursuit	0	+	78	99	NO	$35.67	57.1	$249.83
Python + FRate + Pendimax	4	+	79	99	NO	$26.90	52.9	$237.60
Boundary + Canopy XL	23†	+	98	99	YES	$28.23	51.3	$228.27
Gangster(L) + Pendimax	8†	+	99	99	YES	$28.30	54.2	$242.70
Gangster(H) + Pendimax	5	+	96	99	YES	$31.68	59.7	$266.82*
PRE fb. POST (Conventional)
Prowl fb. Pursuit + Cobra	3	+	71	99	NO	$41.46	53.4	$225.54
Prowl fb. Raptor + Cobra	13†	+	73	99	NO	$41.62	55.7	$236.88
Python fb. FRate + Select	1	+	93	99	YES	$38.32	66.0*	$291.68*
Canopy XL fb. Flex + Assure	20†	+	99	99	YES	$48.40	56.3	$233.10
Boundary fb. Flexstar	3	+	99	99	YES	$38.50	62.7*	$275.00*
Gangster fb. Select	3	+	99	99	YES	$39.20	62.8*	$274.80*
PRE fb. POST (Roundup Ready)
Prowl fb. Extreme	4	+	99	99	YES	$42.49	60.9*	$262.01*
Sencor fb. RoundupWM	0	+	98	96	YES	$37.68	65.2*	$288.32*
Domain fb. RoundupWM	0	+	98	97	YES	$38.61	63.0*	$276.39*
Python fb. GlyphoPlus	0	+	98	99	YES	$37.29	63.9*	$282.21*
Canopy XL fb. RoundupWM	9†	+	98	99	YES	$37.31	57.6	$250.69
IntRRo(L) fb. RoundupWM	0	+	97	97	YES	$35.72	63.5*	$281.78*
IntRRo(H) fb. RoundupWM	0	+	99	97	YES	$40.22	60.1	$260.28*
Boundary fb. Touchdown	0	+	99	96	YES	$45.00	67.7*	$293.50*
Valor fb. RoundupWM	0	+	99	99	YES	$39.13	65.2*	$286.87*
POST 1-pass (Roundup Ready)
GlyphoPlus + FRate	0	+	99	99	YES	$31.68	63.1*	$283.82*
POST 2-pass (Roundup Ready)
Extreme fb. RoundupWM	0	+	97	99	YES	$43.49	62.4*	$268.51*
RoundupOM fb. RoundupOM	0	+	98	99	YES	$37.57	60.0	$262.43*
RoundupWM fb. RoundupWM	0	+	99	99	YES	$41.21	67.4*	$295.79*
Touchdown fb. Touchdown	0	+	99	99	YES	$41.41	62.2*	$269.59*
Untreated	0	0	0	0	NO	0	21.3	$106.25

Abbreviations: SETFA = giant foxtail, CHEAL = common lambsquarters, AMARE = redroot pigweed, BRAKA = wild mustard, SOLPT = eastern black nightshade, AMBEL = common ragweed, ABUTH = velvetleaf, fb. = followed by.

¹ Herbicide and additive costs = avg. of price lists (April 2004); Application cost = $6.00/A; Roundup Ready seed premium = $9.25/A; seeding rate = 155,000 seeds/A. Weed control costs = Herbicide $ + Additive $ + Application $ + seed premium $ (where applicable).

² Crop selling price = $5.00/bu (December 2004). Gross margin = (Yield x Price) – Weed Control Costs.

+ All treatments provided >90% control of weeds listed.

* Values are not significantly different from the highest value within that column.

† Indicates significant soybean injury 45 days after soybean planting.

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