Sencor® is a proven broad-spectrum herbicide registered for broadleaf and grassy weed control in potatoes and a wide range of other crops.
Metribuzin (Group 5)
- Sencor® 75 DF - Water Dispersible Granular (75% dry flowable)
- Sencor® 480 F – Suspension (480 g/L)
- Sencor® 75 DF is available in 2.5 kg jugs
- Sencor 480 F is available in 5 L jugs
BC, AB, SK, MB
- Each 2.5 kg jug treats 6.7 to 17.9 ha (16.5 to 44 ac.)
ON, QC, NB, NS, NFLD, PEI
- Each 2.5 kg jug treats 1.7 to 4.5 ha (4 to 11 ac.)
- Each 5 L jug treats 2.2 to 5.9 ha (5.5 to 14.5 ac.)
6 hours after application
Features and Benefits
- Broad-spectrum broadleaf and grass weed control
- Provides early weed control during critical crop stages
- Can be applied pre-emergent or post-emergent
- Excellent crop safety
- Rate flexibility (depending on stage, formulation and tank mix partner)
- Barnyard grass
- Cheat grass
- Crab grass
- Fall panicum
- Foxtail- green, yellow and giant
- Johnson grass (seedling)
- Witch grass
- Common chickweed
- Common ragweed
- Dandelion (seedling)
- Green smartweed
- Prickly mallow1
- Prostrate pigweed
- Redroot pigweed
- Russian thistle
- Shepherd's purse
- Wild buckwheat2
- Wild Mustard
- Wild potato vine
- Yellow woodsorrel1
- PREEMERGENCE ONLY
- POSTEMERGENCE ONLY
For full product details including, pre-emergent or post emergent rates for your region and controlled weeds please reference the Sencor label.
Application Tips and Best Management Practices for Potatoes
- Must be used with irrigation in Prairie Provinces.
- Allow hill to settle prior to application as any soil disturbance after application can result in weed escapes.
- Dry/drought conditions can result in reduced weed control.
- Needs to be activated before broadleaf weeds reach 4 leaf stage and grasses reach 2 leaf stage.
- Sencor binds to clay, therefore, higher rates are required in heavier soils for longer residual weed control.
- Sencor binds to OM. Higher rates are required in higher OM soils, >4%. This also impacts the longer persistence of carryover when considering sensitive subsequent crops. Sencor breaks down faster in soils with higher pH. Low pH soils are at a higher risk for persistence.
- Do not tank-mix Sencor with 2,4-D.
Post Emergent Considerations
- Detoxification of Sencor is more concentrated in sunlight.
- For best weed control and crop safety it is best to spray mid-day in full sunlight with sunny conditions prior to and the day after application.
- Use high water volumes; 18-20 gallons of water/acre is recommended.
- Higher water volumes can be used as long as you don’t experience run off.
- Tank-mixing with rimsulfuron will antagonize rimsulfuron grassy weed control.
- Under dry and sunny conditions rainfast is 6 hours. Under cloudy conditions allow for 12 hours for rain fastness.
- Temporary yellowing or leaf burn may occur if crop is under stress from poor growing conditions such as periods of cool, wet, and cloudy weather. Avoid post-emergence application under these conditions.
- Some potato varieties can be sensitive to Sencor applied post-emergence.
- Symptoms may appear such as yellowing/necrosis of leaf veins or leaf margins, stunting, and possible delay in harvest.
- Varietal tolerance can vary and is affected by rate and conditions at application.
- Apply Sencor in a small test area to ensure risk or level of potential injury is acceptable to the grower prior to adoption as a general field practice. Sensitivity to or injury after a post-emergent application of Sencor is typically visible in the test area within 5 days after application.
Crop Rotation Considerations:
- Rotation crops such as onions, celery, peppers, cole crops, lettuce, spinach, sugar beets, table beets, turnips, pumpkin, squash, cucumbers, melons, tobacco and non-triazine tolerant canola (rapeseed) are sensitive to Sencor herbicide and may be injured if planted in soil treated with Sencor during the year of application or the following crop year.
- Fall seeded or cover crops such as wheat, oats, and rye may be injured when seeded within the same season as the application of Sencor.
ALWAYS READ AND FOLLOW PESTICIDE LABEL DIRECTIONS. Performance may vary from location to location and from year to year, as local growing, soil and weather conditions may vary. Growers should evaluate data from multiple locations and years whenever possible and should consider the impacts of these conditions on the grower’s fields.
Bayer, Bayer Cross and Sencor® are registered trademarks of Bayer Group. Used under license. All other trademarks are the property of their respective owners. Bayer CropScience Inc. is a member of CropLife Canada. ©2022 Bayer Group. All rights reserved. 5072_S2