Product

Rate

PHI*

Comments

• Controls most seedling grasses and many broadleaved weeds.
• Do not use on muck soils.
• Apply to moist soil and incorporate immediately to a depth of 5 to 7.5 cm. Cross- discing is recommended.
• Planting may begin immediately following treatment.
• The higher rate is necessary for quack grass control.

Eptam 8-E
(EPTC)

Group 8

PLUS:

Sencor 75 DF or                    TriCor 75 DF or
Sencor Solu-Pak

       
Or
        
Sencor 500F

Sencor 75 DF or                    TriCor 75 DF or
Sencor Solu-Pak

Sencor 500F

4.25 to 5.5 L/ha
(1.7 to 2.2 L/acre)



PLUS:

375 to 550** g/ha
(140 to 220 g/acre)



 

Or

550 to 850 mL/ha
(220 to 345 mL/acre)


Or

0.75 to 1.1 kg/ha
(300 to 445 g/acre)




Or

1.1 to 1.75 L/ha
(445 to 710 mL/acre)

• Do not use on the varieties Belleisle or Tobique.
• Apply and immediately incorporate evenly into the top 5 to 7.5 cm.
• Do not use on muck soils or soils with more than 7% organic matter.
• Avoid rotations in the following year with crops sensitive to Sencor (i.e. onions, celery, peppers, cole crops, lettuce, spinach, table and sugar beets, turnips, cucurbits and rapeseed).
• Do not use on red-skinned or early potatoes in sandy soils with less than 2% organic matter.
• **In the Interior, can be used at up to 750 g/ha (304 g/acre) if application is made through irrigation system.
• In the interior, Sencor products can now be used on the variety Shepody.
• Do not apply on newly released varieties without proper consultation.
• Apply in 200 to 300 L/ha (80 to 120 L/acre) of water.
• Sencor: Group 5 herbicide.

Dual Magnum II
(s-metolachlor)

Group 15

PLUS:

Sencor 75 DF or                     TriCor 75 DF

Sencor 500F

1.25 to 1.75 L/ha
(500 to 700 mL/acre)



PLUS:

0.75 to 1.5 kg/ha
(300 to 600 g/acre)



 

Or

1.1 to 2.25 L/ha
(445 to 910 mL/acre)

• Do not use on the variety Superior.
• Do not use on soils with more than 10% organic matter.
• Controls nutsedge and most seedling grasses and some broadleaved weeds
• Use the higher rate for heavier weed populations.
• Do not use on sandy or course textured soils with les than 2% organic matter.
• Do not apply on newly released varieties without proper consultation.
• Do not enter treated area for 12 hours.
• Apply in 150 to 300 L/ha (60 to 120 L/acre) of water.
• Sencor: group 5 herbicide.

Gramoxone

• Apply pre-emergence to potatoes.
• Rates vary with soil types and timing varies with varieties, see label for detail.
• Use the lower rate for control of emerged seedling weeds and the higher rate to control emerged quack grass.
• Gramoxone can be tank-mixed with Lorox L (see label for details.)
• RESTRICTED:  can only be used by individuals holding a pesticide applicator's certificate.
• Note:  Registration of Gramoxone Liquid Herbicide With Wetting Agent (PCP# 8661) expires December 31, 2018.
• Do not enter treated area for 24 hours.

• For Lorox L, use the low rate on lighter soils (lower in clay or organic matter).  Use the high rate on heavier soils.
• Do not use on coarse-textured soils, containing 2% or less organic matter, as crop injury may result.
• Do not use Linuron 400L on very wet or poorly drained soils.
• Controls most annual grasses and chickweed, redroot pigweed, shepherd's purse and smartweed.
• Will not control established perennial weeds or atrazine resistant weeds.
• Make a single broadcast application after planting (at least 5 cm deep), but before the crop emerges.
• Apply before broadleaf weeds are 15 cm tall and before grasses are 5 cm tall.
• Treatment may be applied after hilling if potatoes are completely covered with soil.
• Do not apply after potatoes have emerged.
• Severe damage may result if pre-emergence application is followed by unusually heavy rains.
• Do not replant to other crops within 4 months of application.

Muck or clay soils: 

4.25 to 5.5 L/ha
(1.7 to 2.3 L/acre)

Loam or clay soil with low organic matter: 

4.75 to 4.25 L/ha
(1.1 to 1.7 L/acre)

0.55 to 1.5 kg/ha
(220 to 600 g/acres)




 

Or

850 to 2.25 L/ha
(345 to 910 mL/acre)
 

• Pre-emergence treatment is recommended in coastal areas only.
• Apply pre-emergence to weeds and crop immediately following last cultivation or hilling.
• A light rain or irrigation following application will improve kill.
• Will control a wide range of broadleaved weeds and grasses.
• Does not control atrazine resistant weeds.
• The higher rate is required for barnyard grass, green foxtail, and wild buckwheat and for suppression of Canada thistle, sowthistle and quackgrass.
• Do not use on muck soils.
• Use lower rate on coarse sandy soils.
• Avoid rotation with crops sensitive to Sencor or Lexone the following year (e.g. onions, celery, peppers, cole crops, lettuce, and spinach). Residual injury has occurred on following crops of cereals in the Delta region in dry years. If high rates are used in dry years, plant potatoes for another year.
• Do not use on the varieties Belleisle or Tobique (Warba or Shepody).
• Do not apply on newly released varieties without proper consultation.
• See label for rotational restrictions.
• Do not enter treated area for 12 hours.

1.25 to 1.75 L/ha
(500 to 700 mL/acre)



PLUS:

0.75 to 1.5 kg/ha
(300 to 600 g/acre)

 

Or

1.1 to 2.25 L/ha
(445 to 910 mL/acre)

• Do not use on the variety Superior, Belleisle, Tobique.
• Controls nutsedge and most seedling grasses and some broadleaved weeds.
• Surface moisture is essential for good control.
• Use the higher rate of Dual II Magnum for heavier weed problems.
• Consult the appropriate labels for specific information on soil type variations and special restrictions for this tank-mixes.
• Do not apply to soils with less than 2% organic matter.
• Do not apply on newly released varieties without proper consultation.
• Do not use Dual II Magnum at ground crack or if potatoes have emerged.
• Do not enter treated area for 12 hours.
• Sencor: group 5 herbicide.

• Suppresses redroot pigweed, lamb’s-quarters, hairy nightshade and black nightshade.
• Apply prior to weed emergence.
• Do not apply more than 105 g/ha (42 g/acre) during a growing season.
• To avoid severe crop injury, do not apply after cracking.
• May be applied after hilling.
• At the time of application, a minimum of 5 cm (2 inches) of soil must cover the vegetative portion of the crop.
• Use only on muck soils and medium textured mineral soils with <5% OM.
• Applications made to poorly drained soils or under cool, wet conditions may result in crop injury.
• Control may be improved by irrigation with at least ½ cm of water.

Coarse textured soils: 

756 to 860 mL/ha (306 to 348 mL/acre)

Medium and fine-textured soils:

756 to 963 mL/ha (306 to 390 mL/acre)

Apply in 100 L/ha (40 L/acre) of water.

Coarse textured soils rate:

• Use high rate for soils with high organic matter levels (7 to 10%).

Medium and fine-textured soils rate:

• Use low rate for soils with low O.M. (<3%).
• Use 860 mL/ha (348 mL/acre) for soils with medium O.M. (3 to 6%).
• Use high rate for soils with high O.M. (7 to 10%).

All soils:

• May only be applied in a single application.
• Apply pre-emerge before weeds emerge and after potatoes have been planted.
• Do not apply before planting or onto emerged potatoes.
• Controls labeled broadleaf weeds and grasses such as barnyard grass.
• Use the high rate of 963 mL/ha (390 mL/acre) to control Redroot pigweed and Eastern black nightshade.
• Suppresses yellow nutsedge.
• Do not exceed the specified rate by soil type in a single application.
• Rainfall is required within 7 to 10 days of application to activate and move Outlook into the soil zone. 
• A shallow cultivation may be necessary if dry conditions persist after applying.  Tillage should be minimal to minimize dilution of herbicide.
• Delayed emergence or early season stunting of potatoes may result when applying Outlook in cold, wet conditions.
• Do not graze or feed treated crop to livestock prior to 40 days after application.
• See label for rotational crop and recropping restrictions.
• Do not re-enter treated area for 24 hours.

0.55 to 1.5 kg/ha
(0.3 to 0.6 kg/acre)




Or

850 to 2.25 L/ha
(345 to 910 mL/acre)



 

Or

375 g/ha
(150 g/acre)




Or

550 mL/ha
(220 mL/acre)

• Sensitive varieties that should not be treated early post-emergence include Warba, Red Pontiac, White Rose, Norgold Russet, Shepody, Belleisle, Tobique, Atlantic, Eramosa, red-skinned or early maturing varieties.
• First use on a potato variety  should be limited to a small test area to ensure risk or level of potential injury is acceptable prior to field-wide use.
• Apply before weeds are 4 cm and potatoes are less than 10 cm tall
• Use the lower rate on coarse, sandy soil.
• Tolerance will vary depending on soil type and stress conditions e.g. heat, drought, excessive rain or irrigation and cloudy weather followed by hot days.
• Do not use this product on muck soils.
• Note remarks about weed species and residue injury to rotation crops in pre-emergence section above.
• Does not control atrazine resistant weeds.
• Do not apply on newly released varieties without proper consultation.
• Do not enter treated area for 12 hours.
• Apply in 100 to 300 L/ha (40 to 120 L/acre).
• Group 5 herbicide.

• Annual bluegrass is not controlled.
• Apply when seedling weeds are in the 1 to 6 leaf stage and quackgrass is in the 1 to 3 leaf stage.
• Apply in 50 to 200 L/ha (20 to 80 L/acre) of water.
• Pressure varies with water volume see label for detail.
• Group 1 herbicide.
• There is a plant back restriction of 30 days for crops not listed on the label.
• Do not enter treated area for 12 hours.

Venture L
(fluazifop-p-butyl)

Group 1

• For control of barnyard grass (2 to 5 leaf stage) use 800 mL/ha (300 mL/acre).
• For control of green and yellow foxtail (2 to 4 leaf stage), use 1.4 L/ha (600 mL/acre).
• For quackgrass (3 to 5 leaf stage) control, use 2.0 L/ha (800 mL/acre).
• Do not apply to weeds under moisture or heat stress.
• Do not cultivate for 5 days after application
• Warning: Woman capable of bearing children should avoid exposure to Venture.

Excel Super
(fenoxaprop-p-ethyl)

Group 1

• Apply between the 1 to 6 leaf stage to control foxtails, crabgrass, barnyard grass, old witch grass, or Proso millet.
• Does not control quackgrass, sedges, or other perennial grasses.
• Do not apply any other pesticide or chemical 4 days before or after applying Excel Super.

Prism 25 DF
(rimsulfuron)

Group 2

PLUS

Citowett Plus

Or

Agral 90

Or

Agsurf

• Apply to crop before flower initiation when annual grasses are 1 to 6 leaf, quackgrass is 3 to 6 leaf and redroot pigweed and lamb’s-quarters are 4 to 6 leaf.
• Gives suppression of lamb’s quarter only.
• Do not make more than 1 application per year.
• Do not cultivate within 7 to 10 days prior to or after application
• Apply when temperatures are between 5 to 28^oC in the 24 hours before AND after application. Temperatures beyond this range or stress caused by other conditions increase potential for crop injury.
• Not recommended for use on seed potatoes (leaves a mottled, virus-like effect on leaves for about two weeks).
• For use on irrigated potatoes only
• Dot not enter treated area for 12 hours.

Centurion /Select (clethodim)

Group 1

• Apply when weeds are in 2 to 6 leaf stage.
• Apply when quackgrass is 6 to 15 cm high.
• Centurion/Select is to be used only with the adjuvant Amigo at 0.5 to 1.0% v/v.
• Arrow 240 EC is to be used only with the adjuvant X-Act at 0.5 to 1.0 % v/v.
• Allow 4 days between this application and any other chemical not found on the label.
• Do not apply more than 380 mL/ha per season.
• Do not enter treated area for 12 hours.
• Apply in 55 to 225 L/ha (22 to 90 L/acre) of water.

Arrow 240 EC
(clethodim)

Group 1

Aim EC

(carfentrazone-ethyl)

Group 14

37 to 117 mL/ha
(15 to 47 mL/acre)

Apply in 100 L/ha (40 L/acre) of water

• Controls annual weeds.
• Must be applied using hooded sprayers to weeds between the rows of the emerged crop.
•  Use an adjuvant such as Agral 90 or Agral-Surf at 0.25% v/v (0.25 L/100 L of spray solution) or Merge at 1% v/v (1 L/100 L of spray solution).
• PRECAUTION:  crop injury will occur when spray drift is allowed to come in contact with green stem tissue or leaves.
• Apply only once per growing season.
• Do not apply if used for vine-kill in the same season.  To use Aim EC as a harvest aid, see Potatoes, Vine-Killing section of this guide.