Corn Herbicide Solutions

Corn Growing at Dawn

Corteva Agriscience offers unique corn herbicides that fit your weed control needs and provide solutions for your corn acre.

Designed for use in glyphosate tolerant silage, grazing and grain corn, each of the products provide agronomic benefits to clean your fields and increase your yields.

Sortan™ IS

The only corn herbicide in Western Canada with residual activity to ensure your corn rows remain weed free during the early stages of growth.

  • Provides Moisture – Activated Extended Control
  • Removes weed competition during the critical weed free period
  • Provides resistance management when tank mixed with glyphosate
  • Now registered for use on corn


Learn More


Both Eclipse XC and Lontrel XC have recently been registered for glyphosate tolerant silage, grazing and grain corn. Both products have been proven assets to Western Canadian farmers for many years in canola and are now a tool for corn growers. Offering trusted control on hard to kill weeds such as advanced wild buckwheat, Canada thistle and even volunteer alfalfa. With a very wide window of application, they can be applied from VE to V6.

Superior control of wild buckwheat and Canada thistle

Broad-spectrum weed control in glyphosate-tolerant corn & canola

Why Use Eclipse XC?

  • Convenient all-in-one herbicide solution that offers superior control of a broad spectrum of weeds
  • Two modes of action for resistance management
  • Protects canola without negatively impacting yield or maturity, unlike elevated rates of glyphosate
  • Stronger XC formulation. A convenient, higher concentrated solution


The most effective in-season thistle control available

Why Use Lontrel XC?

Lontrel XC Herbicide
  • Thistle control. Lontrel XC translocates throughout plants for effective control of Canada thistle and sow thistle.
  • Second year benefit. Up to a 73% thistle stand reduction the year after application.
  • Flexibility. Choose a rate that matches the size of your thistle problem.
  • Stronger XC formulation. A convenient, higher concentrated solution.
  • Now registered for use on corn.

Frequently Asked Questions


1. When can Sortan IS be applied?

Sortan IS can be used as both a pre-emergent herbicide or a early post emergent up to the V3 stage of corn. It is important to keep your corn crop weed free during this period.


2. Do I need a surfactant with Sortan IS? 

If sprayed alone, Sortan IS should be tank mixed with a non-ionic surfactant such as Ag Surf or Agral 90 at 0.2% v/v or 0.2L per 100L spray solution. However, optimum control of weeds occurs when Sortan IS tank mixed with 1 full REL of glyphosate. When tank mixed with glyphosate no additional surfactant is required. 


3. How long is the extended control?

7-14 days depending on environmental conditions such as soil temperature and moisture. Wild buckwheat, volunteer canola and redroot pigweed benefit from extended control better than other weeds. 


4. How important is moisture for Sortan IS? 

In order for Sortan IS to be effective it requires rainfall within 3 to 5 days after application. Activation occurs when the top 5 to 10cm of soil is thoroughly moistened following rainfall and the herbicide is readily available to germinating weeks. If moist conditions are not immanent, consider the timing or usage of Sortan IS. 


5. How does Sortan IS preform on kochia?

Sortan IS is not registered to control kochia. 


6. What can I tank mix Sortan IS with other the glyphosate?

Sortan IS is only registered with glyphosate. All forms of glyphosate (including diammonium, isopropylamine or potassium salt formulations) are approved for use with Sortan IS. It is not, however, recommended to mix different glyphosate formulations in the same tank. 


7. Are there any recropping restrictions with Sortan IS? 

Barley, soybeans, white beans, red clover, sorghum, sweet corn, field corn, oats, canola, spring and durum wheat, dry bean, chickpea, sunflower, field pea, lentils, flax, fababeans and potatoes can be planted 10 months after application. Winter wheat may be planted 4 months after application.


8. What rate of Sortan IS should I spray with? 

For optimal residual control as a pre-seed – use at the 40ac per jug rate (30g/ac)

When spraying in crop between VE and V3 either the 40ac or 80ac (30g/ac or 15g/ac) per jug rate can be used. Please check the label and weed spectrum. And always tank mix with glyphosate. 


1. How much more glyphosate can I / should I add?

Up to the maximum label rate on glyphosate resistant corn. Eclipse XC contains a DMA glyphosate formulation. DO NOT mix glyphosate formulations.


2. What stage can I spray Ecplise XC on corn?

Eclipse XC can be sprayed from spike to V6 stage on corn. 


3. Is it safe on all corn including sweet corn

Eclipse XC is only registered on glyphosate tolerant corn hybrids and CAN NOT be sprayed on sweet corn. 


4. Can I spray it preseed/pre emergent?

Eclipse XC is not registered as a pre-seed and will not be supported as pre-seed. 


5. If I add more glyphosate to Eclipse XC does it matter what glyphosate I add?

We recommended topping up with a DMA formulation, such as VP480, to avoid tank mix issues like 


6. What rate can I apply Eclipse XC on corn? 

Eclipse XC is registered for a rate of 40 acres per case


7. What are the cropping restrictions for Eclipse XC?

For pea rotation, rainfall from June 1st to August 31st in the year of application must be greater than 140mm and annual rainfall must be greater than 175mm. 


1. What other corn herbicides can it be tank mixed with?

For corn, the only herbicide that can be tank mixed is VP480 or other glyphosate products.


2. What stage can I spray Lontrel XC on corn?

Lontrel XC can be sprayed from spike to V6 stage on corn


3. What rate can I apply Lontrel XC on corn? 

We recommend the 40/ac per jug rate for optimal weed control


4. What are the cropping restrictions for Lontrel XC?

For pea rotation, rainfall from June 1st to August 31st in the year of application must be greater than 140mm and annual rainfall must be greater than 175mm. 


5. Preharvest and grazing restrictions?

Do not allow livestock to graze corn on treated areas or harvest treated field corn for silage as feed within 40 days after last treatment. 


6. What is the rainfastness?
a. 4 hours

Ready to Protect Your Corn?

Increase the health and performance of your corn crops with Corteva Agriscience's powerful range of effective crop protection solutions.