Redroot pigweed can spread rapidly in crop fields, and finding the best herbicide for redroot pigweed is essential to protect yields. This aggressive weed competes with crops for nutrients and water, making early control critical.
Unchecked redroot pigweed can reduce soybean, corn, and cotton yields by up to 50%. Effective herbicides prevent seed spread and help maintain healthy crop development throughout the season.
Several herbicides target redroot pigweed at different stages, including pre-emergence and post-emergence treatments. Choosing the right product ensures rapid suppression while keeping crops safe from damage.
In this guide, we highlight the best herbicides for redroot pigweed that deliver reliable results. Learn which products act fast and keep your fields free from this stubborn weed.
10 Best Herbicide For Redroot Pigweed
1. Dual Magnum® 7.62 EC – Best Pre-Emergence Redroot Pigweed Control
Brand: Dual Magnum® – Syngenta
Best for: Pre-emergence weed prevention
Dual Magnum® contains s-metolachlor, which blocks redroot pigweed seed germination effectively. Applied before weed emergence, it prevents seedlings from establishing in the field. Farmers report up to 95% early-season control in heavily infested areas.
Its long residual activity ensures protection for several weeks, reducing the need for multiple applications. Safe for both corn and soybean crops, it helps maintain healthy growth. Using Dual Magnum® is ideal for large-acreage farms with persistent redroot pigweed problems.
Pre-emergence application also reduces competition from secondary weeds, making crop management easier. Its reliability has made it a top choice among professional farmers. Regular monitoring ensures maximum effectiveness.
Pros:
• Pre-emergence
• Corn safe
• Soybean safe
• Long residual
• Effective
• Easy spray
• Reliable
Cons:
• Timing critical
• Not post-emergence
• Chemical smell
2. Flexstar® GT 3.5 – Best Post-Emergence Redroot Pigweed Killer
Brand: Flexstar® GT – Syngenta
Best for: Post-emergence broadleaf weed suppression
Flexstar® GT contains fomesafen, which attacks redroot pigweed leaves for rapid wilting. Visible results appear within 3–7 days, making it highly effective in mid-season infestations. It is safe for soybeans when applied according to label instructions.
This herbicide is ideal for resistant redroot pigweed populations, as it provides reliable post-emergence control. Farmers appreciate its fast action and ease of application across large fields. It can be tank-mixed with other herbicides for broader weed coverage.
Flexstar® GT also reduces competition with crops during critical growth stages. Its proven track record makes it a top choice for both commercial and small-scale farms.
Pros:
• Post-emergence
• Fast acting
• Soybean safe
• Resistant control
• Rapid wilting
• Tank mix
• Field proven
Cons:
• Sensitive to rainfall
• Limited pre-emergence
• Strong odor
3. Outlook® 6.5 EC – Best Long-Residual Pre-Emergence
Brand: Outlook® – Bayer
Best for: Extended pre-emergence control
Outlook® contains dimethenamid-P, offering long residual control for redroot pigweed seedlings. Application before emergence ensures up to 6 weeks of protection. It is safe for corn crops and minimizes early weed competition.
Residual activity reduces repeated applications and saves labor costs. Outlook® is highly effective in high-pressure redroot pigweed infestations. Farmers report consistent suppression across multiple seasons.
Using Outlook® also prevents secondary weed problems and keeps fields clear for crop growth. Its reliability has made it a preferred choice in corn and soybean rotations.
Pros:
• Long residual
• Corn safe
• Pre-emergence
• Effective
• Field proven
• Easy spray
• Reliable
Cons:
• Not post-emergence
• Timing critical
• Chemical use
4. Authority® XL 70 – Best for Cotton Fields
Brand: Authority® XL – FMC
Best for: Cotton crop redroot pigweed suppression
Authority® XL combines sulfentrazone and carfentrazone, targeting redroot pigweed at pre- and early post-emergence stages. Visible control is often seen within 1–2 weeks. It is safe for cotton crops while maintaining high efficacy.
Residual control reduces the need for repeated applications, saving time and cost. Its broad-spectrum activity prevents secondary weed growth. Cotton growers report excellent field performance and consistent suppression.
Authority® XL works well even in resistant redroot pigweed populations. Its versatility makes it ideal for integrated weed management programs. Careful application ensures maximum effectiveness.
Pros:
• Cotton safe
• Fast control
• Pre & post
• Broad spectrum
• Long residual
• Reliable
• Easy use
Cons:
• Chemical residue
• Repeat treatment
• Rain sensitive
5. Capreno® Herbicide – Best Resistant Weed Solution
Brand: Capreno® – Bayer
Best for: Resistant post-emergence redroot pigweed
Capreno® contains thiencarbazone-methyl + tembotrione, effective against resistant redroot pigweed populations. Wilting is visible within 7 days, preventing further growth and seed production. Safe for corn crops when used as labeled.
Its combination with glyphosate enhances control of resistant weeds. Farmers report up to 98% suppression in challenging fields. The post-emergence formula allows flexibility for mid-season treatment.
Capreno® is ideal for areas with multi-herbicide resistant redroot pigweed. Its rapid action and reliability make it a top-performing product.
Pros:
• Resistant control
• Fast acting
• Corn safe
• Post-emergence
• Effective
• Field tested
• High suppression
Cons:
• Costly
• Label sensitive
• Not organic
6. Cobra® Herbicide – Best Rapid Post-Emergence
Brand: Cobra® – FMC
Best for: Fast redroot pigweed suppression
Cobra® contains lactofen, which rapidly wilts redroot pigweed leaves. Visible effects appear in 3–5 days, making it perfect for quick mid-season control. Compatible with soybean and cotton rotations when applied correctly.
Cobra® is ideal for spot treatments or field-wide applications. Its quick action prevents weeds from competing during critical crop growth. Farmers value its reliability and ease of application.
Regular use of Cobra® can reduce repeated field passes. Spot spraying ensures efficient use of resources.
Pros:
• Fast acting
• Post-emergence
• Soybean safe
• Cotton safe
• Spot treatment
• Rapid wilting
• Field flexible
Cons:
• Chemical odor
• Rain sensitive
• Repeat needed
7. Aim® EC – Best Early Growth Suppression
Brand: Aim® EC – Syngenta
Best for: Seedling-stage control
Aim® EC contains carfentrazone-ethyl, which quickly burns young redroot pigweed leaves. Best applied to seedlings under 4 inches tall. Visible control appears within one week of application.
Its low-use rate reduces chemical exposure in sensitive areas. It can be tank-mixed with other herbicides for broader coverage. Farmers prefer it for spot treatments in resistant populations.
Aim® EC prevents seed set in early-season infestations. Rapid action minimizes crop competition.
Pros:
• Early suppression
• Low-use rate
• Fast acting
• Seedling control
• Tank mix
• Quick burn
• Field tested
Cons:
• Limited size
• Repeat needed
• Chemical smell
8. Status® Herbicide – Best Dual Action Solution
Brand: Status® – BASF
Best for: Dual-stage control in corn fields
Status® combines isoxaflutole + thiencarbazone-methyl, effective both pre- and post-emergence. It suppresses redroot pigweed throughout multiple growth stages. Safe for corn crops when applied as labeled.
Dual-action control reduces the number of applications required. Its long-term suppression prevents seedbank buildup. Farmers report excellent results even under resistant weed pressure.
Status® is highly effective in high-pressure infestations. Using it strategically ensures maximum crop protection.
Pros:
• Dual action
• Corn safe
• Pre & post
• Long-term control
• Effective
• Reduced passes
• Field proven
Cons:
• Expensive
• Label sensitive
• Chemical use
9. Laudis® Herbicide – Best Late-Season Control
Brand: Laudis® – Bayer
Best for: Late-stage suppression in corn
Laudis® contains tembotrione, targeting late-stage redroot pigweed plants. Visible control occurs within 7–10 days. Safe for corn crops, allowing late-season intervention.
Its rapid action prevents seed production, reducing future infestations. Laudis® is suitable for large-acreage fields and resistant populations. Farmers rely on it for finishing control and minimizing crop competition.
Using Laudis® late in the season ensures fields are clean before harvest. It supports integrated weed management strategies.
Pros:
• Late-season control
• Post-emergence
• Corn safe
• Fast acting
• Prevents seeding
• High suppression
• Field proven
Cons:
• Expensive
• Repeat needed
• Sensitive timing
10. Prefix® Herbicide – Best Broad-Spectrum Crop Solution
Brand: Prefix® – Syngenta
Best for: Corn fields with mixed weed pressure
Prefix® combines s-metolachlor + fomesafen, providing pre- and post-emergence control of redroot pigweed. It offers long residual activity and visible effects within 7–14 days. Safe for corn crops and other broadleaf weeds.
Dual-mode action reduces repeated applications and field labor. Its broad-spectrum coverage makes it ideal for mixed infestations. Farmers appreciate its reliability and flexibility.
Prefix® helps maintain clean fields and protects crop yields effectively. It is especially useful in resistant weed scenarios.
Pros:
• Pre & post
• Broad-spectrum
• Corn safe
• Residual control
• Effective
• Field tested
• Easy application
Cons:
• Expensive
• Chemical odor
• Repeat needed
Conclusion
Choosing the best herbicide for redroot pigweed is essential to maintain high crop yields. Dual Magnum® is the top choice for pre-emergence control due to long-lasting performance and reliability.
For post-emergence treatment, Capreno® is the ideal runner-up, delivering rapid action against resistant populations. Using both strategically minimizes seed spread and reduces field infestations.
Combining effective herbicides with proper field management ensures crops remain healthy throughout the growing season. Selecting a best solution and runner-up gives flexibility in controlling redroot pigweed efficiently.
Acting early with these top-performing herbicides can save time, protect your harvest, and maximize yield potential. These choices give farmers confidence and control over one of the most aggressive weeds in agriculture.