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Herbicide

Calovor

Group 4 & Group 19

 

Fast, effective post-emergent weed control in field corn.

  • Unique combination of Group 4 (dicamba) and Group 19 (diflufenzopyr) chemistries 
  • Delivers fast knockdown and consistent control of broadleaf weeds (including glyphosate-resistant), and helps manage perennial weeds 
  • Built-in safener for tank-mixing with glyphosate
  • Wide application window with tank-mix flexibility to meet the needs of your field

Labels & SDS

3 AVAILABLE

  

Applicable On

Field Corn

Labels & SDS

ADDITIONAL RESOURCES

Benefits of Calovor

  • Excellent control of broadleaf weeds like kochia, lamb’s quarters, redroot pigweed, common ragweed and waterhemp
  • Manage tough-to-control weeds such as wild buckwheat and perennials like Canada thistle
  • Multiple modes of effective action and tank-mix flexibility with Armezon herbicide, Liberty 200 SN herbicide, Zidua SC herbicide, atrazine or glyphosate for broader weed control and resistance management
  • Wide application window from 2- to 8-leaf corn, to help manage weeds early or target late-season flushes

 

HOW DOES CALOVOR® HERBICIDE WORK?

  1. Auxins are plant growth hormones

  2. Diflufenzopyr interrupts auxin transport, so auxins can no longer move normally through the weed

  3. This causes natural plant auxins and synthetic auxins like dicamba to accumulate at growing points, increasing weed control

Performance Trials

Weed Efficacy with Calovor

Weed control pictured 6 days after a post-emergent application

Product Guides and Specifications

Weed Management

Weed Class  Weeds controlled  
Broadleaf weeds

Biennial wormwood1, 2

Canada thistle1, 3

Common cocklebur1,4

Common ragweed

Giant ragweed1,5,6

Kochia7

Lady's-thumb

Lamb's quarters

Perennial sow-thistle1,6,8

Redroot pigweed

Tall waterhemp1

Velvetleaf1

Volunteer adzuki beans1,9 

Volunteer canola10

Wild buckwheat 

 

1 Post-emergence application at 2-8 leaf stage of corn only.

2 Apply at the 2-8 leaf stage of biennial wormwood.

3 Top growth only.

4 Apply at the cotyledon to 6-leaf stage of common cocklebur.

5 Apply at the 2-8 leaf stage of giant ragweed.

6 Suppression only.

7 Apply at less than 15 cm high.

8 Apply at the 2-10 leaf stage of perennial sow-thistle.

9 Apply at the unifoliate to third trifoliate stage of volunteer adzuki beans.

10 Apply at the cotyledon to 4-leaf stage of volunteer canola.

Application Tips

Apply Calovor when air temperature is between 10-27˚C. DO NOT apply when there is a risk of severe drop in night temperature. 

Rainfastness: 4 hours

Grazing: Do not graze or cut corn for forage or silage within 75 days of application. See label for additional restrictions. 

Resistance management: Where possible, rotate the use of Calovor or other Group 4 or Group 19 herbicides within a growing season (sequence) or among growing seasons with different herbicide groups that control the same weeds in a field.

Pre-harvest interval: 120 days

When to Apply

Crop Staging
Field Corn 2 to 8 leaf

How Much to Apply

One case of Calovor will treat 40 acres. One case contains 2 X 2.88 kg jugs

Field Corn 144 g/ac (356 g/ha)11

11For Calovor applied alone, include non-ionic surfactant at 0.25% v/v and liquid urea ammonium nitrate (UAN) at 1.25% v/v.

Water Volume
Ground application only 40 L to 80 L/ac (10 to 20 gal/ac)

 

Mixing Order

1. Fill sprayer ½ full with clean water and agitate.

2. If required, add the correct amount of product in PVA bags to the mixing tank and continue agitation. Wait until fully dissolved and product is evenly mixed. 

3. Add the correct amount of Calovor to the spray tank and continue agitation until completely dissolved and product is fully dispersed.

4. For Calovor applied alone, add the recommended amount of non-ionic surfactant followed by the recommended amount of UAN (28% N).  

5. If required, add the correct amount of liquid, solution or suspension product tank-mix partner.

6. If required, add in the correct amount of emulsifiable concentrate product tank-mix partner.

7. If required, add the correct amount of glyphosate product tank-mix partner.

8. If required, add in the correct amount of adjuvants or surfactants.

9. Continue agitation while adding the remaining amount of water.

Tank Mixes

Armezon®, Liberty® 200 SN, Prowl® H2O, Zidua® SC, atrazine, glyphosate.

See label for more details on tank mixes. 

Follow Crops

Plant back interval of 30 days is required for the planting of rotational crops.

Always read and follow label directions.

AGSOLUTIONS, ARMEZON, CALOVOR, LIBERTY, PROWL and ZIDUA are registered trademarks of BASF, used under license by BASF Agricultural Solutions Canada Inc. © 2026 BASF Agricultural Solutions Canada Inc. All rights reserved.

ENLIST and LONTREL are registered trademarks of Corteva Agriscience and its affiliated companies.