2008 North Dakota Weed Control Guide
W-253, January 2008
R. K. Zollinger, NDSU Extension Weed Specialist
|
Herbicide |
Product/A
(ai/A) | Weeds |
When to Apply |
Remarks and Paragraphs Glyphosate
| 0.38 to 1.5 lb ae
| See Remarks. Emerged grass
and broadleaf
weeds.
| Preplant or
anytime prior to
crop emergence. | lb ae/gal lb ai/gal 0.38 ae 0.75 ae 1.125 ae 1.5ae
| 3 4 = 16 fl oz 32 fl oz 48 fl oz 64 fl oz 4/4.17 5.4 = 12 fl oz 24 fl oz 36 fl oz 48 fl oz 4.5 5.5 = 11 fl oz 22 fl oz 32 fl oz 44 fl oz 5 6.1 = 10 fl oz 20 fl oz 30 fl oz 40 fl oz Non-selective, non-residual, translocated, foliar herbicide. Apply with AMS fertilizer. Refer to label for adjuvant use. Commercial mixtures available. A4-6 X1 Paraquat | RUP 2 to 4 pt 2SL | 1.3 to 2.7 pt 3SL (0.5 to 1 lb) Non-residual, contact herbicides; thorough coverage
essential. Apply with a NIS at 0.25% v/v to small
weeds. | Refer to pages 108-109 for commercial mixtures. B4 S1 S3-4 Q3 X1 Aim | (carfentrazone) 1/2 to 1 fl oz EW | (0.128 to 0.256 oz) Small broadleaf
weeds.
| Thifensulfuron
| 0.3 to 0.6 oz DF | 0.45 to 0.9 oz SG (0.225 to 0.45 oz) Broadleaf weeds
including wild
buckwheat and vol.
RR canola.
| Improves broadleaf weed control including wild
buckwheat when tank-mixed with glyphosate. | Add NIS at 0.25 to 0.5% v/v. D15 D18 S1 X1 2,4-D
| 1 to 2 pt 4EC/SL | (0.5 to 1 lb) Preplant burndown of emerged annual
broadleaf weeds. Days before seeding: | 1 pt amine = 15 days. 1 pt ester = 7 days. 2 pt amine or ester = 30 days. A preplant application for use only in reduced tillage.
Soybean injury may occur. Seed at least 1.5 to 2
inches deep to ensure seed is separated from the
herbicide. Refer to pages 108-109 for commercial
mixtures. D2 X1
| Prowl | Prowl H2O (pendimethalin) 2.4 to 3.6 pt EC | 2.1 to 3 pt ACS (1 to 1.5 lb) Annual grass and
some broadleaf
weeds.
| PPI. | Fall or Spring. Adjust rate according to soil type. | Do not apply Sonalan or trifluralin PRE. No wild mustard and poor wild oat control. Green foxtail has become resistant to dinitroaniline (DNA) herbicides in North Dakota. Refer to pages 108-109 for commercial mixtures. A1-3 D13 S7 X1 Y18 Y24 Sonalan | Sonalan 10G (ethalfluralin) 1.5 to 3 pt | 5.5 to 11.5 10G (0.55 to 1.15 lb) Trifluralin
| 1 to 2 pt | (0.5 to 1 lb) Sencor | (metribuzin) Soil pH >7.5 = | 0.25 lb DF Soil pH <7.5 = 0.33 to 0.5 lb DF Broadleaf weeds
including wild
mustard.
| PPI.
| Sencor may injure certain soybean varieties. | Refer to pages 108-109 for commercial mixtures. D12 S7 Y4 Y17 Y24 Metolachlor | s-Metolachlor 1 to 2 pt | (0.95 to 1.9 lb) Grass and some
broadleaf weeds.
| PPI or PRE.
| s-Metolachlor may give greater weed control than
Metolachlor at equal product rates. | Poor wild oat control and wild mustard control. PPI gives more consistent control than PRE. PRE requires precipitation for herbicide activation. Adjust rate according to soil type and OM. Outlook gives greater nightshade control. Refer to pages 108-109 for commercial mixtures. A1 C11 D8 Intrro
(alachlor) RUP
| 2 to 3 qt | (2 to 3 lb) Outlook | Propel (dimethenamid-P) 16 to 21 fl oz | (0.75 to 1 lb) PPI, PRE or
EPOST.
| Valor | (flumioxazin) 2 to 3 oz WDG | (1 to 1.5 oz) Small-seeded
broadleaf weeds
including pigweed,
nightshade, kochia
lambsquarters,
and B. wormwood.
| EPP, Shallow PPI,
and PRE. | Requires precipitation to activate herbicide.
Refer to label or narrative for tank-mix options,
application information, rate structure, and crop
rotation restrictions. Refer to pages 108-109 for
commercial mixtures. | D6 D16 S3-5 S7 Y24 D6 D14 S3 S4-5 S7 X1 Y2 Y19 Y24 Spartan | (sulfentrazone) 3 to 8 fl oz F | (1.5 to 4 oz)  Python(flumetsulam) 0.8 to 1.33 oz DG
or | 5 to 3 A/pack (0.64 to 1.06 oz) Python does not
control ALS
resistant kochia.
| D10 S4 S7 Y2 Y13 Y24 | |||
SOYBEAN
|
Herbicide | Product/A
(ai/A) | Weeds |
When to Apply |
Remarks and Paragraphs
POST Herbicides
| Basagran
| (bentazon) 1 to 2 pt | (0.5 to 1 lb) Some broadleaf
weeds.
Suppression of
biennial wormwood
and Can. thistle.
| POST. | Soybean: Any stage. Broadleaf weeds: Small. Contact, non-residual herbicide; thorough coverage
required. Apply with oil additive at 1 qt/A. Two
applications at a 7 to 10 day interval improves weed
control. Apply first treatment at unifoliate to first
trifoliate soybean. D4 E6 S4 S7 T2
| Rezult | (Co-pack of bentazon & sethoxydim) 1.6 + 1.6 pt | (1 & 0.2 lb) Grass and
broadleaf weeds.
| POST. Soybean: | Emergence to 30 days PHI. Apply with oil adjuvants at 1 to 2 pt/A. | Refer to Basagran and Poast sections for additional information. Tank-mix with Raptor at 2 fl oz/A for improved weed control. D3-4 E6 Ultra Blazer | (acifluorfen) 0.5 to 1.5 pt | (0.125 to 0.375 lb) Wild mustard,
redroot pigweed,
and volunteer flax.
| POST. Soybean: | 1 to 2 trifoliates. Weeds: 1 to 4 inches tall. Contact, non-residual herbicide; thorough coverage
required. | Apply when temperature exceed 70 F. D5 S4 Cobra | (lactofen) 6 to 12.5 fl oz | (1.5 to 3.2 oz) Small broadleaf
weeds.
| POST. Up to 45
days before
harvest. Weeds: 2
to 6 inches.
| Contact herbicide, thorough coverage required. | Apply with oil adjuvant at 1 to 2 pt/A. Refer to narrative for environmental response, tank-mix options, and for white mold suppression. D5 S4 Flexstar | (fomesafen + adjuvants) 0.75 to 1 pt | (0.176 to 0.24 lb) Broadleaf weeds
including pigweed,
cocklebur, Venice
mallow, mustard,
ragweed,
smartweed, black
nightshade, kochia
including resistant. | Poor hairy nightshade control. POST. | Soybean: Prior to flowering. Weeds: 2- to 4-leaf stage. Contact herbicide requiring thorough coverage. | Use at 1pt/A in ND east of I-29 and south of I-94 and at 1 pt/A in MN south of I-94. Use 0.75 pt/A in ND east of Hwy 281 and in MN south of US Hwy 2. Refer to label for crop rotation restrictions. Use MSO adjuvants at 1% v/v + AMS at 10 lb/100 gal water. Follow restrictions for each geographic region. To improve kochia control apply with oil adjuvant, at high water volume, and to kochia less than 2 inches tall. Sequential applications may be necessary. A7 D7 S3 S4-5 Y12 Y24 FirstRate | (cloransulam) 0.3 oz WDG or | 10 A/pack (0.25 oz) Venice mallow,
cocklebur,
horseweed,
ragweed,
sunflower, and | wild mustard. POST. Soybean:
Up to 50% of
plants flowering. | Weeds: Up to 10 inches tall. Apply with NIS at 0.125% v/v or oil adjuvant at 1.2%
v/v alone or with 28% UAN at 2.5% v/v. | Refer to label or narrative or label for weed size, tank-mix options and crop rotation restrictions. Refer to pages 108-109 for commercial mixtures. D6 X1 Y2 Y24 Thifensulfuron
| 1/12 oz DF | 1/8 oz SP (0.062 oz) Wild mustard,
pigweed, and
lambsquarters.
No ALS-resistant
kochia control.
| POST. | Soybean: Fully expanded 1st trifoliate leaf until 60 days PHI. Apply with a NIS at 0.25% v/v or oil additive plus 28%
UAN or AMS. | Refer to label for tank-mix options. D15 S1 S5 X1 Pursuit | (imazethapyr) 3 fl oz | (0.75 oz) Annual broadleaf
weeds including
nightshade,
kochia, pigweed,
and mustard.
| POST. | Soybean: Fully expanded first trifoliate leaf but prior to flowering. Weeds: Small and actively growing. Apply with NIS or oil adjuvant and liquid fertilizer. | MSO-type oil adjuvants have given greater enhancement than petroleum oil or NIS. Refer to narrative for application information, weed size, crop rotation restrictions, and other use information. Raptor has less soil residual carryover than Pursuit. Poor common lambsquarters (>2 inches), ragweed, wild buckwheat and biennial wormwood control. No control of ALS-resistant kochia. A7 D9 D11 S4 X1 Y2 Y6 Y24 Raptor | (imazamox) 4 to 5 fl oz | (0.5 to 0.625 oz) Annual grass and
broadleaf weeds.
| | ||||
SOYBEAN
|
Herbicide | Product/A
(ai/A) | Weeds |
When to Apply |
Remarks and Paragraphs Assure II
| Targa (quizalofop) 4 to 10 fl oz | (0.44 to 1.1 oz) Annual grasses
and quackgrass.
| Soybean: Prior to
pod set. | Grass weeds: Refer to table below. Apply with oil adjuvant at 1% v/v but not less than 1
pt/A. Oil adjuvant at more than 1 qt/A is not needed. | See Select Max label for detailed adjuvant recommendations. Grass control is reduced by tank mixtures or close interval application of POST broadleaf control herbicides. Antagonism generally can be avoided by applying a higher rate of grass herbicide or apply the grass control herbicide 1 or more days before or 5 to 7 days after the broadleaf control herbicide. Do not cultivate prior to 5 days before or 7 days after application. Refer to label for tank-mix options. Refer to page 126 for control of volunteer corn. D3 X1 Fusilade DX | (fluazifop-P) 5 to 12 fl oz | (1.25 to 3 oz) Fusion | (fluazifop-P & fenoxaprop) 4 to 12 fl oz | (1 to 3 oz & 0.32 to 0.96 oz) Poast | (sethoxydim) 0.5 to 1.5 pt | (0.09 to 0.28 oz) Annual grasses.
| Soybean: All
stages. | Grass weeds: Refer to table below. Clethodim
| 4 to 16 fl oz
| (1 to 4 oz) Annual grasses
and quackgrass.
| Select Max | (clethodim) 9 to 32 fl oz | (1.125 to 4 oz) |
GRASS CONTROL WITH POST HERBICIDES
|
Herbicide | Weed size
(inches) | Rate (fl oz/A) | Herbicide | Weed size
(inches) | Rate (fl oz/A) | Herbicide | Grass size
(inches) | Rate (fl oz/A) Green and yellow foxtail
| Wild-proso millet
| Volunteer corn
| Assure II/Targa | Fusilade DX Fusion Poast Clethodim Select Max 2 to 4 | 2 to 4 2 to 4 1 to 8 2 to 8 2 to 6 6 to 8 8 | 10 to 12 8 1 pt 4 to 6 9 12 Assure II/Targa | Fusilade DX Fusion Poast Clethodim Select Max 2 to 6 | 4 to 8 4 to 8 4 to 10 1 to 10 2 to 6 6 to 8 8 | 6 6 0.5 pt 4 to 6 9 12 Assure II/Targa | Fusilade DX Fusion Poast Clethodim 6 to 30 | 12 to 24 12 to 24 1 to 20 4 to 12 12 to 24 4 to 8 | 4 to 8 6 1 pt 4 6 Wild oat, Vol. small grains, Sandbur
| Quackgrass
| Select Max
| 1 to 12 | 12 to 24 24 to 36 6 | 9 12 Assure II/Targa | Fusilade DX Fusion Poast Clethodim Select Max 2 to 6 | 2 to 6 2 to 6 1 to 4 2 to 6 2 to 6 6 to 8 8 | 8 8 1 pt 6 9 12 Assure II/Targa | Fusilade DX Fusion Poast Clethodim Select Max 6 to 10 | 6 to 10 6 to 10 6 to 8 4 to 12 4 to 12 10 fb 8 | 12 fb 8 12 fb 12 1.5 fb 1 pt 8 fb 8 12 fb 12 Refer to page 126 for control of volunteer
corn. | | ||||||||||||
Preharvest Application
|
Herbicide | Product/A
(ai/A) | Weeds |
When to Apply |
Remarks and Paragraphs Glyphosate
| Up to 0.75 lb ae
| See Remarks. Preharvest weed
control.
| Prior to harvest. | Apply after pods have set and lost all green color. Allow a 7 day PHI. Apply with AMS fertilizer. Refer to label for adjuvant
use. | Do not apply on soybean grown for seed because reduced germination/vigor may occur. A4-6 Paraquat | RUP 8 to 12 fl oz 2SL | 5.6 to 8.4 fl oz 3SL (0.13 to 0.188 lb) Desiccant.
| Prior to harvest. | Allow a 15 day PHI. Apply with NIS at 0.125% v/v. | Apply when at least 65% of seed pods are a mature brown color or when seed moisture is 30% or less. Q3 |
ROUNDUP READY SOYBEAN
|
Herbicide | Product/A
(ae/A) | Weeds |
When to Apply |
Remarks and Paragraphs Glyphosate
| Maximum single
application =
1.5 lb ae | Maximum in-crop = 2.25 lb ae See Remarks. Annual and
perennial grass
and broadleaf
weeds.
| POST. | Soybean: Emergence through R2 of full flowering. The R2 stage ends when a pod 3/16 inch long at one of the four uppermost nodes appears on the main stem along with a fully developed leaf (R3 stage). Allow a 14 day PHI. Apply only to glyphosate-resistant soybean
varieties. | Maximum - Maximum - single appl. in-crop lb ae/gal lb ai/gal 1.5 ae 2.25 ae 3 4 = 64 fl oz 96 fl oz 4/4.17 5.4 = 48 fl oz 72 fl oz 4.5 5.5 = 44 fl oz 66 fl oz 5 6.1 = 40 fl oz 60 fl oz Apply with AMS fertilizer. Multiple applications may be necessary for weed flushes. Drift and off-site movement may cause injury or death to other plants and crops. Refer to label for weeds controlled, application information, adjuvant use, tank-mix options with residual herbicides and restrictions. Cannot plant harvested patented soybean seed. A4-6 A7 D17 S4 X1 |
ROUNDUP READY/STS (sulfonylurea-tolerant) SOYBEAN
|
Herbicide | Product/A
(lb ai/A) | Weeds |
When to Apply |
Remarks and Paragraphs
Refer to Roundup Ready soybean above for use of glyphosate in RUR/STS soybean.
| Thifensulfuron
| 0.33 oz DF
| 0.5 oz SG (0.25 oz) Annual broadleaf
weeds including,
wild buckwheat,
lambsquarters,
mustard species,
and volunteer RR
canola.
| POST. | RUR/STS soybean: 1st fully expanded trifoliate to 60 days PHI. Apply only to RUR/STS soybean varieties. | Apply with glyphosate at 0.38 to 1.125 lb ae/A. Apply with NIS at 0.125 to 0.25% v/v to non-loaded glyphosate. Refer to label for adjuvant use. Apply with AMS at 4.25 to 8 lb/100 gal water. Refer to label for weeds controlled, application information, and crop rotation restrictions. Refer to page 126. D15 D17-18 X1 | ||||
WEED MANAGEMENT IN ROUNDUP READY SOYBEAN
NDSU recommends using herbicides with different modes of action and different weed control management practices in Roundup Ready soybean production to delay development of glyphosate resistant weeds. See pages 106-107 for more information on weed resistance.
COMMANDMENT #1 - Control weeds BEFORE 2 to 4 inches tall to avoid yield loss.
Remove weeds early especially when grass weed populations are high. Data from the mid-west may indicate that soybean yield may not be reduced by weeds up to 6 inches tall. However, data from the northern Plains show that, especially under dry conditions, soybean yield loss may occur if weeds greater than 4 inches are allowed to compete with soybean.
Glyphosate at 1.5 oz ae/A controls foxtail, at 2.25 oz ae/A controls volunteer small grain, and at 3 oz ae/A controls wild oat and downy brome. Use higher rates on broadleaf weeds, larger weeds, tolerant weeds, or if weeds are under environmental stress. See glyphosate section on page 68 for more information about increasing weed control from glyphosate.
Three Systems of Weed Control in RR Soybean
1. PRE followed by glyphosate POST: All PRE herbicides require rain for activation.
Page 22 lists many registered PRE soybean herbicides that can be used in herbicide resistant soybean. PRE herbicides at 2/3
the labeled rate may give 60 to 90% control of some grass and broadleaf weeds, will reduce weed infestations emerging with
soybean, will allow more flexibility in application of POST herbicides, and will help protect yield from early season weed
competition.
2. Glyphosate + POST broadleaf herbicide (different mode of action):
Several herbicides listed in the following table will improve control of weeds not controlled by glyphosate. Glyphosate has no
soil residual. Glyphosate has no soil residual and will not control weeds emerging after application. Glyphosate may not
control some weed species or biotypes. Many POST herbicides listed will give residual weed control. Most herbicide
companies have marketing programs in RR soybean. Follow label directions for tank-mix and application information.
3. Glyphosate (EPOST = 2 to 4 inch tall weeds) followed by glyphosate (POST = 14 to 21 days later):
This program will increase the risk of weed resistance unless other strategies are used in rotational crops - see Herbicide
Resistant Weed Section, page 106-107.
The following table shows herbicides to apply in tank-mix or sequentially with glyphosate in RR soybean for control of weeds
not controlled by glyphosate. Weed ratings are control without glyphosate. Refer to label for tank-mix and specific application
information. Residual weed control listed in the table refers to control of subsequent flushes of weeds after herbicide
application.
Herbicides to apply in tank-mix or sequentially with glyphosate in RR soybean for control of weeds not controlled by
glyphosate.
Rate/A
Cost/A
W. buck
wheat
Vol. RR
canola
Horse
weed
Kochia
Lambs
quarters
Comon
mallow
Night
shade
Prickly
lettuce
Common
ragweed
Smart
weed
Water
hemp
Preplant or PRE herbicides - no residual weed control
Weed Control Ratings3
2,4-D ester
Plant >7 d
0.5 - 1 pt
$1.00 - 2.00
P
P-G
E
P
E
P
N
E
E
F
G
Aim
0.5 - 1 fl oz
$2.80 - 5.60
P
N-P
N
F-E
F-G
-
N
F
N
N
E
Thifensulfuron
See label
$4.50 - 9.00
E
G-E
N
E4
E
G-E
N
E4
G
E4
E4
Rage D-tech
Plant >14 d
8 - 24 fl oz
$ -
E
G-E
N
E4
E
G-E
N
E4
G
E4
E4
Preplant or PRE herbicides - with residual weed control - See Combination herbicides for soybean.
Prowl, Sonalan, Treflan2 - PPI
See label
$3.00 - 8.00
N
N
N
P
F-E
N
N
N
N
P
F-E
Python2
0.8 - 1 oz DG
$8.00 - 10.00
F-G
E
E
E4
E
-
E
-
P
G-E
E4
Spartan2
3 - 4.5 fl oz
10.00 - 15.00
P-F
P
E
E
E
-
F-E
P
P
E
E
Valor
2 - 2.5 oz WDG
9.40 - 11.75
P-F
P
E
E
E
E
E
E
P
F
E
POST herbicides - See Combination herbicides for soybean.
FirstRate2
<50% flowr
0.3 oz WDG
$8.70
P-F
P-G
E4
P4
P
-
N
-
E
E
N
Flexstar2
< Flowering
0.5 - 0.75 pt
$7.00 - 10.00
P
E
N
G-E
P-F
G-E
F-E
-
G-E
G-E
E
Harmony GT
60 day PHI
1/12 oz XP
$1.20
P
P-F
N
F-G4
G
N
N
P4
N
G-E
N
Pursuit2
< Flowering
2 - 3 fl oz
$8.15 - 12.20
P
E
N
E4
P-F
P
E
E4
P
G
N
Raptor2
< Flowering
2 - 3 fl oz
8.15 - 12.20
P
E
N
E4
F
P
E
G4
P
G-E
N
1See page 126 for size of volunteer canola and herbicide rates.
2May carry over more than one cropping season. Follow labeled crop rotation restrictions. See pages 110-116.
3E = Excellent (90-99%), G = Good (80-90%), F = Fair (65-80%), P = Poor (40-65%), N = None.
4Except where resistant populations have developed.
5Registration Pending
Combination Herbicides for Soybean:
* Plant no earlier than 14 days after application
Trade Name
Manufacturer
Applied at
(Prod/A)...
Cost/A
Gives the equivalent product rates of:
Authority Assist
FMC
-
Pending
- fl oz Spartan + - fl oz Pursuit
Authority First
FMC
2.4 oz
3.2 oz
$9.60
$12.80
3 fl oz Spartan + 0.2 oz FirstRate
4 fl oz Spartan + 0.3 oz FirstRate
Authority MTZ
FMC
10 oz
12 oz
$10.30
$12.40
3.6 fl oz Spartan + 3.6 oz Sencor
4.33 fl oz Spartan + 4.33 oz Sencor
Boundary
Syngenta
1.2 pt
$11.70
0.83 pt Dual Magnum + 4 oz Sencor
Domain
Bayer
9 oz
$7.00
4.33 fl oz Define + 4.33 oz Sencor
Extreme
BASF
1.5 pt
2.25 pt
$6.75
$9.00
2 fl oz Pursuit + 12 fl oz glyphosate-ipa (3 lb ae/gal)
3 fl oz Pursuit + 18 fl oz glyphosate-ipa (3 lb ae/gal)
Gangster (co-pack)
Valent
1.8 oz
$12.50
1.5 oz Valor + 0.3 oz FirstRate
Pursuit Plus
BASF
1.8 pt
20 fl oz
$12.40
$8.60
1.28 pt Prowl H2O + 2.9 fl oz Pursuit
0.88 pt Prowl H2O + 2 fl oz Pursuit
Rage D-tech*
FMC
8 fl oz
16 fl oz
$3.35
$6.65
�� fl oz Aim + 0.5 pt 2,4-D ester - apply only EPP.
1 fl oz Aim + 1 pt 2,4-D ester - apply only EPP.
Sequence
Syngenta
1.5 pt
$10.35
18 fl oz glyphosate-ipa + 0.6 pt Dual II Magnum
Sonic
Dow
3.2 oz
$12.80
See Authority First
DRY EDIBLE BEAN
Herbicide
Product/A
(ai/A)
Weeds
When to Apply
Remarks and Paragraphs
Glyphosate
0.38 to 1.5 lb ae
See Remarks.
Emerged grass
and broadleaf
weeds.
Preplant or
anytime prior to
crop emergence.
lb ae/gal lb ai/gal 0.38 ae 0.75 ae 1.125 ae 1.5ae
3 4 = 16 fl oz 32 fl oz 48 fl oz 64 fl oz
4/4.17 5.4 = 12 fl oz 24 fl oz 36 fl oz 48 fl oz
4.5 5.5 = 11 fl oz 22 fl oz 32 fl oz 44 fl oz
5 6.1 = 10 fl oz 20 fl oz 30 fl oz 40 fl oz
Non-selective, non-residual, translocated, foliar
herbicide.
Apply with AMS fertilizer. Refer to label for adjuvant
use. Commercial mixtures available.
A4-6 X1
Paraquat
RUP
2 to 4 pt 2SL
1.3 to 2.7 pt 3SL
(0.5 to 1 lb)
Non-residual, contact, herbicides; thorough plant
coverage required. Apply with a NIS at 0.25% v/v to
small weeds.
B4 S1 S3-4 Q3 X1
Aim
(carfentrazone)
1/2 to 1 fl oz EW
(0.128 to 0.256 oz)
Small broadleaf
weeds.
Eptam
(EPTC)
3.5 to 4.5 pt
15 to 20 lb G
(3 to 4 lb)
Grass and some
broadleaf weeds.
PPI.
PPI immediately after application. Consult label for
rate range for specific tank mix.
A1-3 E2 S4
Prowl
Prowl H2O
(pendimethalin)
2.4 to 3.6 pt 3.3EC
2.1 to 3 pt 3.8ACS
(1 to 1.5 lb)
PPI.
Fall or Spring.
Apply when soil temperature is <45 F for fall
applications. Adjust rate according to soil type. Refer
to label for rotational restrictions and tank-mix options.
A1 D13 S7 Y20 Y25
Trifluralin
1 to 2 pt EC
5 to 10 lb 10G
(0.5 to 1 lb)
PPI within 24 hours after application. Refer to label for
tank-mixtures and crop rotational restrictions.
A1 A3 D13 S7 X1 Y1 Y18 Y24
Sonalan
(ethalfluralin)
1.5 to 4.5 pt EC
(0.55 to 1.69 lb)
5.5 to 11.5 lb 10G
(0.55 to 1.15 lb)
No wild mustard and poor wild oat control.
Adjust rate according to soil type.
Use highest rate allowed for nightshade control.
Use EC formulation in spring and 10G formulation in
fall. Refer to narrative for rotational restrictions.
A1 A3 D13 S7 Y18 Y24 X1
Metolachlor
s-Metolachlor
1 to 2 pt
(0.95 to 1.9 lb)
Grass and some
broadleaf weeds.
Spring:
PPI or PRE.
s-metolachlor may give greater weed control than
metolachlor at equal product rates.
Poor on wild mustard and wild oat.
Adjust rate according to soil type and OM.
PPI improves consistency of weed control.
Outlook provides greater nightshade control.
Refer to pages 108-109 for commercial mixtures.
A1 C11 E3 S4
Outlook
Propel
(dimethenamid-P)
16 to 21 fl oz
(0.75 to 1 lb)
PPI, PRE, or
EPOST.
Intrro
(alachlor) RUP
4 to 6 pt
(2 to 3 lb)
PPI.
Permit
(halosulfuron)
�� to 2/3 oz DF
(0.38 to 0.5 oz)
Cocklebur,
Venice mallow,
ragweed, nutsedge
smartweed,
sunflower, and
nutsedge.
PPI or PRE.
Use lower rate on coarse-textures soils.
Refer to label for tank-mix options, crop rotation
restrictions, and other restrictions.
C13 Y3 Y24
Pursuit Plus
(imazethapyr &
pendimethalin)
20 fl oz
(0.5 oz & 0.42 lb)
Broadleaf weeds
including pigweed,
wild mustard, and
nightshade.
Pursuit Plus may
control wild
buckwheat.
No control of ALS-
resistant kochia.
PPI.
Up to 1 week
before planting.
May be tank-mixed with other labeled herbicides
including Prowl H2O.
A1 A7 D9 E4 G1 H1 S4-5 S7 X1 Y2 Y20 Y25
Pursuit
(imazethapyr)
2 fl oz
(0.5 oz)
Shallow PPI, PRE.
POST. Drybean:
After 1st trifoliate
but prior to
flowering.
User assumes all risk of crop injury. Reduced crop
growth, quality, yield and/or delayed maturity may
result. Do not apply prior to or during stress conditions
(cold/wet). Allow a 60 day PHI. Refer to label for tank-mix options, application information, weed size, crop
rotation restrictions, and other use information.
A7 D9 E4 G1 H1 S4-5 X1 Y2 Y24
Raptor
(imazamox)
4 fl oz
(0.5 oz)
Annual grass and
broadleaf weeds.
No control of ALS-
resistant kochia.
POST. Drybean:
After 1st trifoliate
but prior to
flowering.
Apply with NIS or oil additive plus 28% UAN.
Do not use oil adjuvant + 28% UAN during high
temperature and humidity. Refer to label for use
information. A7 D11 S4 X1 Y2 Y6 Y24
DRY EDIBLE BEAN
Herbicide
Product/A
(ai/A)
Weeds
When to Apply
Remarks and Paragraphs
Basagran
(bentazon)
1 to 2 pt
(0.5 to 1 lb)
Some broadleaf
weeds.
Suppression of
biennial wormwood
and Canada
thistle.
POST.
Dry bean:
After emergence.
Broadleaf weeds:
Small.
Contact herbicide; thorough spray coverage required.
Apply with oil adjuvant at 1 qt/A.
Two applications at a 7 to 10 day interval improves
overall weed control. Apply the first treatment at
unifoliate to first trifoliate dry bean.
D4 E6 S4 S7 T2
Rezult
(bentazon &
sethoxydim)
1.6 + 1.6 pt
(1 & 0.2 lb)
Grass and
broadleaf weeds.
POST.
Dry bean:
1st trifoliate to 30
days prior to
harvest.
Add oil adjuvants at 1 to 2 pt/A. Tank-mix with Raptor
at 2 fl oz/A for improved weed control. Refer to
Basagran and Poast sections for use information.
D3-4 E6 S7
Reflex
(fomesafen)
0.75 pt
(0.19 lb)
Annual broadleaf
weeds including
ragweed, kochia,
and nightshade
including ALS-resistant.
POST.
Dry bean:
1st trifoliate to
bloom.
Weeds:
1 to 4 inches.
Apply with NIS at 0.125 to 0.25% v/v or oil adjuvant at
0.5 to 1% v/v. Allow a 30 day PHI. Oil adjuvant may
increase risk of crop injury. Refer to label for weeds
controlled, application information, risk of crop injury,
and crop rotation restrictions.
A7 E5 S3 S4-5 Y14 Y25
Assure II
Targa
(quizalofop)
8 to 10 fl oz
(0.88 to 1.1 oz)
Annual grasses
and quackgrass.
POST.
Dry bean:
Allow a 30 day
PHI.
Grass: Refer to
soybean section
on page 26.
Apply with oil adjuvant at 1% v/v but not less than 1
pt/A. Oil adjuvant at more than 1 qt/A is not needed.
See Select Max label for detailed adjuvant
recommendations.
Refer to soybean section, label, or narrative for tank-mix options, possible grass antagonism with broadleaf
herbicides, and avoiding reduced grass control.
D3 X1
Poast
(sethoxydim)
0.5 to 1.5 pt
(0.1 to 0.3 lb)
Annual grasses.
Clethodim
4 to 8 fl oz
(1 to 2 oz)
Annual grasses
and quackgrass.
Select Max
(clethodim)
9 to 32 fl oz
(1.125 to 4 oz)
NDSU Micro-rate
Rezult +
Raptor +
Reflex +
Clethodim +
MSO adjuvant
0.5 to 0.6 &
0.5 to 0.6 pt +
1 fl oz +
2 to 4 fl oz +
2 fl oz (optional) +
1 to 1.5 pt/A
Grass and
broadleaf weeds,
including kochia,
pigweed, and
nightshade.
May not control
wild buckwheat.
POST.
Weeds. Small.
Must be less than
2 to 3 inches tall.
User assumes all risk of inadequate weed control
when using this reduced-rate treatment.
Must be applied with MSO or MSO + basic pH blend.
Clethodim can be excluded if grass infestation is low.
Refer to label for crop rotation restrictions and
additional information.
A5 A7 D3-4 D7-11 E4-6 S3-4 X1 Y2 Y12 Y24
Preharvest Application
Glyphosate
Up to 0.75 lb ae
Harvest aid/
Weed control.
After dry bean
pods have turned
yellow and leather
texture.
At hard dough
bean seed stage
and 30% or less
seed moisture.
DO NOT USE AS CROP DESICCANT.
Only certain formulations are labeled. Refer to label.
Non-selective, non-residual, translocated, foliar
herbicide. Allow a 7 day PHI.
Do not apply to dry bean grown for seed because
reduced germination/vigor may occur.
A4-6 X1
Paraquat
RUP
1.5 to 2 pt 2SL
1 to 1.3 pt 3SL
(0.375 to 0.5 lb)
Desiccant.
At least 80% pods
are yellow/brown.
Apply when no more than 40% (bush type beans) or
30% (vine type) of the leaves still green.
Sequential applications may be needed.
Contact herbicides; thorough coverage required.
Valor can be applied with paraquat + MSO adjuvant
for weed desiccation.
Allow a 7 day PHI for paraquat.
Allow a 3 day PHI for Aim.
Allow a 5 day PHI for Valor.
B5 Q3
Aim +
MSO adjuvant
(carfentrazone)
2 to 6 fl oz EC +
1 qt/A
(0.53 to 1.5 oz)
Valor +
MSO adjuvant
(flumioxazin)
Registration
Pending
1.5 to 2 fl oz +
1 qt/A
(0.77 to 1.53 oz)
FIELD PEA
Herbicide
Product/A
(ai/A)
Weeds
When to Apply
Remarks and Paragraphs
Glyphosate
0.38 to 1.5 lb ae
See Remarks.
Emerged grass
and broadleaf
weeds.
Preplant or
anytime prior to
crop emergence.
lb ae/gal lb ai/gal 0.38 ae 0.75 ae 1.125 ae 1.5ae
3 4 = 16 fl oz 32 fl oz 48 fl oz 64 fl oz
4/4.17 5.4 = 12 fl oz 24 fl oz 36 fl oz 48 fl oz
4.5 5.5 = 11 fl oz 22 fl oz 32 fl oz 44 fl oz
5 6.1 = 10 fl oz 20 fl oz 30 fl oz 40 fl oz
Apply with AMS fertilizer. Refer to label for adjuvant
use. A4-6 X1
Paraquat
RUP
2 to 4
1.3 to 2.7 pt
(0.5 to 1 lb)
Non-residual, contact herbicides; thorough coverage
required.
Apply with a NIS at 0.25% v/v to small weeds.
B4 S1 S3-4 Q3 X1
Aim
(carfentrazone)
1/2 to 1 fl oz EW
(0.128 to 0.256 oz)
Small broadleaf
weeds.
Far-Go
(triallate)
1.25 qt EC
12.5 to 15 lb 10G
(1.25 lb liquid or
1.25 to 1.5 lb 10G)
Wild oat.
PPI.
PPI immediately after application.
A two pass incorporation is recommended.
A1 A3 B14 F1
Prowl
Prowl H2O
(pendimethalin)
1.75 to 3.6 pt EC
1.5 to 3 pt ACS
(0.72 to 1.5 lb)
Grass and some
broadleaf weeds.
PPI.
Fall or Spring.
Apply in fall when soil temperature is <45 F.
Adjust rate according to soil type.
No wild mustard and poor wild oat control.
Some pea varieties may be injured.
A1 D13 F1 S7 Y1 Y6 Y18 Y24
Trifluralin
1 to 1.5 pt
5 to 7.5 lb 10G
(0.5 to 0.75 lb)
Sonalan
(ethalfluralin)
1.5 to 2 pt
5.5 to 7.5 lb 10G
(0.55 to 0.75 lb)
Metolachlor
s-Metolachlor
1 to 2 pt
(0.95 to 1.9 lb)
PPI or PRE.
Fall or Spring.
s-Metolachlor may give greater weed control than
metolachlor at equal product rates. Poor wild mustard
and wild oat control. PPI improves consistency of
weed control. Refer to pages 108-109 for commercial
mixtures. A1 C11 E3 F1
Spartan
(sulfentrazone)
2.25 to 8 fl oz F
(1.125 to 4 oz)
Small-seeded
broadleaf weeds
including kochia,
pigweed species,
lambsquarters,
and nightshade.
Fall, EPP, shallow
PPI, and PRE.
Use lower rates on light soils with OM <3%.
Requires precipitation to activate herbicide.
Refer to label or narrative for rate structure, and crop
rotation restrictions. Refer to pages 108-109 for
commercial mixtures.
D14 F1 J3 S1 S3 S4-5 S7 Y19 Y24
Pursuit Plus
(imazethapyr &
pendimethalin)
20 fl oz
(0.5 oz &
0.42 lb)
Broadleaf weeds
including redroot
pigweed, mustard,
and nightshade.
PPI.
Up to 1 week
before planting.
May be tank-mixed with other labeled herbicides.
Addition Prowl/H2O may be added.
May control wild buckwheat and ALS resistant kochia.
A1 A7 D9 E4 G1 H1 S4-5 S7 X1 Y2 Y18 Y24
Pursuit
(imazethapyr)
2 fl oz
(0.5 oz)
No control of ALS-
resistant kochia.
Shallow PPI, PRE.
User assumes all risk of crop injury. Reduced crop
growth, quality, yield and/or delayed maturity may
result. Do not apply prior to or during stress conditions
(cold/wet). Allow a 60 day PHI. Refer to label for tank-mix options, application information, weed size, crop
rotation restrictions, and other use information.
A7 D9 E4 G1 H1 S4-5 X1 Y2 Y24
Metribuzin
0.33 to 0.5 lb DF
(0.25 to 0.38