Herbicide Layering: How to get effective weed control with PrecisionPac® herbicide
When it comes to weed control, it's no secret that staying ahead of resistance is a challenge. That's where herbicide layering comes in—a proven strategy to keep weeds under control while protecting your go-to herbicides for the long haul. And with PrecisionPac® Application Innovation, layering herbicides just got a whole lot easier and more effective.
What is Herbicide Layering?
Herbicide layering involves using multiple herbicide groups with different modes of action at different times in the growing season. Instead of mixing everything into one tank and spraying it all at once, layering spreads out the applications to hit weeds at various stages of growth.
For example, you might start with a pre-seed herbicide that combines a couple of modes of action and then follow up in-crop with entirely different modes of action. This staggered approach makes it harder for weeds to build resistance, keeps your fields cleaner for longer and protects the effectiveness of herbicides for future crops.
Why It Works
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Slows Resistance: Using different modes of action at other times makes it harder for weeds to adapt.
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Season-Long Control: Tackles weeds at multiple stages, keeping your crop clean from start to finish.
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Future-Proofing Your Fields: Prevents weeds from setting seed, cutting down on problems for next year.
Layering Starts with a Strong Pre-Seed Plan
The first step in herbicide layering is getting your pre-seed application right. Here’s where FMC can help, with three types of pre-seed herbicides that fit perfectly into a layering strategy:
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Burnoff Herbicides: Knock out emerged weeds so you can start planting on a clean slate.
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Extended Weed Control: These products create a barrier within the soil surface, stopping later flushes of weeds after being activated by a moisture event.
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Complete Solutions: A combo of burnoff and extended control for the ultimate weed-free start to the season.
Where PrecisionPac® Herbicides Fit In
PrecisionPac® Application Innovation doesn't believe in a one-size-fits-all approach to weed control. Instead, it can create 23 different herbicide blends, each tackling a specific weed spectrum in your field. Your PrecisionPac® herbicide blend comes packaged in a small, easy-to-carry bag with the field name or number right on it.
PrecisionPac® herbicide blends are pre-measured by the PrecisionPac® machine, so you don’t have to worry about measuring or dealing with leftovers. Just grab your custom PrecisionPac® bag, add it with your other tank-mix partners, and you'll be ready to roll. It's as easy as that.
Built for Resistance Management
The PrecisionPac® herbicide approach says it all: "Right product, right rate, right acre." Each herbicide blend delivers precisely what your field needs, tackling tough, resistant weeds or preparing your fields for seeding. Because PrecisionPac® herbicides give you exactly what you need—no more, no less—it helps reduce waste and keeps costs in check.
A Simple Strategy with Big Payoffs
Herbicide layering isn't just about controlling weeds this year—it's about building a plan that keeps your fields clean and your herbicides working for seasons to come. By combining the right products with PrecisionPac® herbicides, you'll have an effective, efficient, and easy-to-manage strategy.
Herbicide Layering Starts With A Strong Pre-Seed Plan
FMC has you and your growers covered across all three categories of pre-seed herbicides that can be incorporated into effective herbicide layering strategies.
A deeper dive into PrecisionPac® herbicides
Yes, you can manage kochia. Here’s how.
A weed scientist looked at managing kochia through the span of a four-year crop rotation. Learn the chemical and cultural practices that can manage the worst impacts of this weed and help contain its spread.
Click here to learn more
Embrace herbicide customization
Weed control is critical to maximizing yield and quality and to reduce the risk of herbicide resistance. Learn how to customize your weed control to get multiple modes of action that hit the weed spectrum in your field with an amount of product perfectly sized for your field or sprayer.
Click here to learn more
Managing resistance means using different modes of action - PPAC
Weed resistance to herbicides has been a reality for a long time. The discovery of glyphosate-resistant kochia biotypes is spreading rapidly across Western Canada. Get ahead in your resistance management by using multiple modes of action and by practicing herbicide layering.
Click here to learn more
Taking charge of kochia and cleavers in wheat - PPAC
Kochia is spreading quickly, including biotypes that are resistant to multiple herbicide groups. Cleavers are on the rise too through the dark brown, black and grey wooded soil zones. A well-timed early season control can make an enormous difference in controlling both of these weeds.
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Fmc burnoff herbicide products
Spring burnoff is a herbicide application that happens pre-seed or pre-emergence to the crop. A proper burnoff application controls emerged weeds so you can begin seeding into a clean slate. A PrecisionPac® spring burnoff is a great way to handle those tough winter annuals and biennials that have germinated early.
FMC Burnoff Herbicide Products (CLICK TO VIEW)
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PRECISIONPAC® CF HERBICIDEFlexible tank-mix options for enhanced burnoffPrecisionPac® CF herbicide provides effective, quick burnoff of hard-to-control and glyphosate-resistant weeds, all with the customizable package size and rates that make PrecisionPac® herbicides unique. This Group 14 herbicide offers flexible rates and tank-mix options to ensure the right agronomic fit for your weed spectrum and application needs across a broad range of major crops. |
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PRECISIONPAC® CF-09-878 HERBICIDEFast, lasting burnoff control on many tough broadleaf weedsPrecisionPac® CF-09-878 herbicide ahead of cereals takes control of tough weeds like kochia, narrow-leaved hawk’s-beard, dandelion and Russian thistle. With 4 modes of action from Groups 2, 4, 14 & 9 (when mixed with glyphosate), you get fast and lasting control of key weeds and good resistance management. |
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PRECISIONPAC® CF-18-50 HerbicideVersatile burnoff with powered-up performance and no re-cropping restrictionsPrecisionPac® CF-18-50 herbicide is a level up from your traditional burnoff, with 3 modes of action from Groups 2, 14 & 9 (when mixed with glyphosate). Get fast and lasting control of key weeds that glyphosate alone cannot. PrecisionPac® CF-18-50 herbicide is our most flexible burnoff option with no re-cropping restrictions the following year. |
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PRECISIONPAC® CF-18-439 HerbicidePowerful burnoff blend for long-lasting, systemic weed controlPrecisionPac® CF-18-439 herbicide is a premium burnoff blend for northern geographies that require up to 15 days of extended control of key weeds such as cleavers, dandelion, narrow-leaved hawk’s-beard and volunteer canola. With 3 modes of action from Groups 2, 14 & 9 (when mixed with glyphosate), you will experience the power-up effect with fast burndown activity and lasting systemic control. |
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PRECISIONPAC® CF-18-878 HerbicidePremium burnoff to help control the toughest-to-kill weeds and manage resistancePrecisionPac® CF-18-878 herbicide is our premium burnoff blend with activity on over 50 weeds, which includes kochia, narrow-leaved hawk’s-beard, Russian thistle and volunteer canola. This blend has 4 modes of action from Groups 2, 4, 14 & 9 (when mixed with glyphosate), working for you to help delay the onset of herbicide resistance. |
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PRECISIONPAC® CF-18-878 PRO HerbicidePowerful burnoff, extended control, and effective resistance managementOur highest performing burnoff blend that controls herbicide resistant weeds. Get control of over 50 of the toughest-to-control weeds with up to 15 days of extended control on weeds such as germinating cleavers, dandelion, narrow-leaved hawk’s-beard, and volunteer canola. |
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PrecisionPac® DB-878 herbicideResistance management foundation designed for your weed spectrumPrecisionPac® DB-878 herbicide is a customized burnoff add-in that gets right to the root of your toughest weed problems in wheat (spring, durum & winter), spring barley and oats. With its built-in multiple modes of action, PrecisionPac® DB-878 herbicide provides a key resistance management tool for pre-seed control of many broadleaf weeds like kochia (including Group 2- and 9-resistant biotypes), narrow-leaved hawk’s-beard, dandelion and wild buckwheat. |
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PrecisionPac® DB-878 PRO herbicideTrusted kochia control with extended activity on key weedsPrecisionPac® DB-878 PRO herbicide sprayed ahead of wheat (spring, durum & winter), barley and oats tackles kochia (including Group 2- and 9-resistant biotypes) and provides up to 15 days of extended control on tough weeds like cleavers, dandelion, narrow-leaved hawk’s-beard and volunteer canola. With enhanced performance and extended activity on key weeds, DB-878 PRO herbicide builds on the DB-878 herbicide foundation to deliver more complete burnoff control in northern geographies. |
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PrecisionPac® NC-0050 herbicideHard-hitting burnoff weed control with maximum flexibilityPrecisionPac® NC-0050 herbicide gives glyphosate a boost in pre-seed, chemfallow and post-harvest applications. Its systemic activity gets right to the root of your toughest weed problems, yet it leaves you with maximum cropping flexibility so you can seed a wide variety of crops 24 hours after application. |
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PrecisionPac® NC-00439 herbicideMulti-active burnoff with extended controlPrecisionPac® NC-00439 herbicide offers extended control of key broadleaf weeds in pre-seed, chemfallow and post-harvest applications. It can be applied up to 24 hours prior to seeding wheat (spring, durum & winter), barley or oats. When tank-mixed with glyphosate, PrecisionPac® NC-00439 herbicide can provide up to 15 days of extended control on some of the toughest weeds in your fields, including cleavers, dandelion, narrow-leaved hawk’s-beard and volunteer canola. |
Extended weed control
Improve your early season weed management with a product that protects the crop’s critical weed-free period. Products with extended weed control help manage weed pressure as the crop becomes established. PrecisionPac® extended weed control products create a soil-barrier once the herbicide goes into a solution with an activation rain or moisture event. This soil-barrier provides control of later weed flushes, reducing weed competition during that critical time.
FMC Extended Weed Control Products (CLICK TO VIEW)
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PRECISIONPAC® SZ HerbicideGive your crop the clean start it deservesPrecisionPac® SZ herbicide is a flexible pre-emergent Group 14 herbicide for soybeans, field peas, chickpeas and wheat (spring & durum – low rate only). PrecisionPac® SZ herbicide has best-in-class control of kochia, including Group 2- & 9-resistant biotypes. |
FMC Complete Solution products
PrecisionPac® complete solution herbicides give you everything you need— pre-seed burnoff plus extended control —in one easy to use blend. They’re designed to simplify your routine and deliver dependable results, so you can focus on what matters most, growing your best crop.
FMC Complete Solution Products (CLICK TO VIEW)
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PRECISIONPAC® PF-100-0050 HerbicideA complete solution blend with extended control of grassy and broadleaf weedsTake control of your toughest-to-control weeds with PrecisionPac® PF-100-0050 herbicide ahead of spring (excluding durum) and winter wheat. This complete solution herbicide blend provides control of emerged weeds like cleavers, narrow-leaved hawk’s-beard, lamb’s-quarters and wild buckwheat, plus extended control of key grassy and broadleaf weeds like green and yellow foxtail, Japanese brome, cleavers, downy brome and suppression of Group 1 and 2 herbicide-resistant wild oats. The Group 2 and 15 modes of action provide effective weed control while helping delay the onset of herbicide resistance. |
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PrecisionPac® SZ-0050 herbicideConsistent broadleaf burnoff with extended kochia controlWhen tank-mixed with glyphosate, three active ingredients give PrecisionPac® SZ-0050 herbicide consistent control, stopping growth down to the root across a wide range of broadleaf weeds with no regrowth — plus extended control of Group 2- and 9-resistant kochia and suppression of Russian thistle for preplant use on spring and durum wheat, field peas and soybeans. |
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PRECISIONPAC® SZ-75-18 HerbicideFast broadleaf burnoff with extended kochia controlGive your crop the clean start it deserves. PrecisionPac® SZ-75-18 herbicide is a flexible Group 14 herbicide that provides burnoff and extended control in soybeans, field peas, chickpeas and wheat (spring & durum). PrecisionPac® SZ-75-18 herbicide has best-in-class extended control of kochia (including Group 2- and 9-resistant biotypes) and suppression of Russian thistle – plus burnoff of emerged kochia, lamb’s quarters, flixweed and Russian thistle. |
FMC Post-Emergent Broadleaf Weed Control
Broadleaf weeds can be a real problem once they’ve started growing. PrecisionPac® post-emergent herbicide products are designed to tackle these stubborn invaders at the right time, protecting your crop and helping you maintain strong, healthy yields.
FMC Post-Emergent Broadleaf Weed Control (CLICK TO VIEW)
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PRECISIONPAC® DB-6654 HerbicideSuperior perennial and biennial weed control for the brown soil zonePrecisionPac® DB-6654 herbicide is a high-performing in-crop herbicide with enhanced broadleaf control in wheat (spring & durum) and barley. Rely on this blend for superior control of kochia (including Group 2-resistant), Russian thistle and wild buckwheat. |
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PRECISIONPAC® DB-8454 HerbicideWeed control for the brown soil zonePrecisionPac® DB-8454 herbicide provides control of the toughest weeds in the brown soil zones, especially when it comes to annual weeds like wild buckwheat, stinkweed, volunteer canola and flixweed. It also offers solid control of Group 2-resistant kochia, narrow-leaved hawk’s-beard, dandelion and Russian thistle. It contains both Groups 2 & 4 to help manage weed resistance and can be used in wheat (spring & durum) and barley. |
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PRECISIONPAC® PP-2525 HerbicideGentle on crops, tough on the toughest weedsFor consistent in-crop weed control in wheat (spring, durum & winter), barley and oats*, PrecisionPac® PP-2525 herbicide controls a wide spectrum of weeds, including narrow-leaved hawk’s-beard, hemp-nettle, redroot pigweed, cow cockle and volunteer canola. A fit in all major soil zones, PrecisionPac® PP-2525 herbicide offers tank-mix and re-cropping flexibility. *When tank-mixed with MCPA Ester |
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PRECISIONPAC® PP-23235 HerbicideBiennial and perennial weed specialist for dark brown, black and grey soil zonesPrecisionPac® PP-23235 herbicide provides premium control in the black, dark brown and grey-wooded soil zones on a broad spectrum of weeds, with leading performance on perennial and biennial weeds like round-leaved mallow, night-flowering catchfly, scentless chamomile, white cockle and suppression of Canada thistle in wheat and barley. |
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PRECISIONPAC® PP-3317 HerbicideProven performance with maximum flexibilityPrecisionPac® PP-3317 herbicide delivers exceptional value with proven performance on wild buckwheat (up to the 5-leaf stage), hemp-nettle, narrow-leaved hawk’s-beard and chickweed in wheat (spring, durum & winter), barley and oats. You can further customize your weed control with many tank-mix options, including Perimeter® II herbicide for improved control of kochia and cleavers. Plus, it leaves you with complete re-cropping flexibility the following year.
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FMC Cross-Spectrum Grassy and Broadleaf Weed Control
When you are dealing with a mix of grassy and broadleaf weeds, you need a versatile solution. PrecisionPac® cross-spectrum herbicides offer proven control for a wide range of weeds, giving you the confidence to keep your fields clear and your crops growing strong.
FMC Cross-Spectrum Grassy and Broadleaf Weed Control (CLICK TO VIEW)
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PRECISIONPAC® CS-100-2525 HerbicideOne-pass grassy and broadleaf weed control tailored to your farmPrecisionPac® CS-100-2525 herbicide offers tailor-made, one-pass weed control for spring and durum wheat. PrecisionPac® CS-100-2525 herbicide delivers outstanding control of your toughest broadleaf and grassy weeds, including Group 1-resistant wild oats, Japanese brome, dandelion* and narrow-leaved hawk’s-beard. * Suppression |
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PRECISIONPAC® CS-75-2525 HerbicideGreat weed control, exceptional valuePrecisionPac® CS-75-2525 herbicide is a cost-effective, all-in-one solution for controlling lower wild oat populations (<75 plants/m2) that combines a reduced rate of our pyroxsulam with PrecisionPac® PP-2525 herbicide. That way, you get wild oat activity without compromising exceptional broadleaf weed control in your spring and durum wheat. |
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PRECISIONPAC® CS-100-23235One pass, one solution for your most challenging fieldsPrecisionPac® CS-100-23235 herbicide is an all-in-one blend for the dark brown, black and grey soil zones that combines our pyroxsulam and PrecisionPac® PP-23235 herbicide together for uncompromising control of broadleaf and grassy weeds in spring and durum wheat. |
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PRECISIONPAC® CS-75-23235 HerbicideWild oat activity, broadleaf performance, exceptional valuePrecisionPac® CS-75-23235 herbicide combines a reduced rate of our pyroxsulam and PrecisionPac® PP-23235 herbicide in a cost-effective, all-in-one solution that delivers wild oat activity and exceptional broadleaf weed control for your spring and durum wheat. |
