2025 Range & Pasture Far West Steward Magazine - v1

09 OPTIMIZE YOUR INVESTMENT 15 PASTURES & HEALTHY CATTLE 23 LEAFY SPURGE CONTROL 27 PROTECTING BIG GAME HABITATS

03 Ruminations 04 Opt in for eSteward 05 Anxiety Weeds and Solutions 07 Weed Control Outlook 09 Our Range & Pasture Portfolio 11 5 Reasons to Switch to HighNoon ® Herbicide

15 Pastures & Healthy Cattle 17 6 Tips for Effective Weed Control 20 The Importance of Hay 23 Leafy Spurge Control 25 Meet the 2024 ESAP Winners 27 Protecting Big Game Habitats in Idaho 30 7 Digital Resources

\\ WELCOME! // Caring for the Land, Together Our partnership stretches beyond the sale.

Welcome to your 2025 reference issue of Range & Pasture Steward Magazine! We’re excited to bring you the latest pasture and rangeland management news and advice. Our goal with Range & Pasture Steward over the last 35-plus years has been to help you care for the acres under your watch in a way that helps you — as we so hear often — leave the land in better condition than you found it. We appreciate your business. With your ongoing support, we continue to invest in discovering, developing and bringing new solutions to market. New NovaGraz™ herbicide is the latest example. At last, when you ask, “Do you have anything that will take the weeds out of my pastures without killing my white clover?” our resounding answer is, “Yes!” You can find much more about NovaGraz throughout this issue. But rest assured, we view our role as a trusted industry partner as much more than marketing products. Our local Range & Pasture Specialists aim to do more than just help you control pasture weeds and brush. Maybe one of our products isn’t the best solution. Or perhaps a tweak to your grazing program is the best solution. You can count on our dedicated field specialists for answers or help finding answers. It’s this role as a trusted adviser, partner and advocate we value most. We’d sure like to stay in touch and bring you localized, timely reminders throughout the year. Simply visit KeepSteward.com to sign up and opt in for email updates, including eSteward and unlimited access to the digital version of Range & Pasture Steward. Meanwhile, read through this edition, and hang on to it for all the pasture management information you need when you need it. Have a great 2025 grazing season!

MORGAN BOHLANDER // U.S. Range & Pasture Portfolio Marketing Lead // Corteva Agriscience

Keep It Coming — Renew Your Subscription You receive this annual Range & Pasture Far West Steward reference issue each winter — but there’s more! When you sign up at KeepSteward.com, you can stay in the loop with the latest information on pasture and rangeland improvement. For starters, you can expect: > Timely insights and specific recommendations on managing the toughest pasture weeds > Success stories featuring real cattle producers > Updates on new products and solutions that can help produce more forage for your herd > So much more! When you sign up, be sure to opt in for monthly pasture management tips delivered to your email. The process is quick and easy, and we promise not to overload your inbox. We just need your permission and confirmation of your mailing address. Renew your free subscription today at KeepSteward.com and tell your friends to sign up too! Subscribe today at KeepSteward.com.

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The Nightmare Weeds of 2025 Our annual weed survey reveals familiar names — and some new arrivals.

If weedy worries are keeping you awake at night, we have good news. First, you’re not alone. Based on the survey results of Corteva Agriscience Range & Pasture Specialists, ranchers across the country are fighting many of the same problems. Second, Corteva has a solution for just about any weeds that may be causing you grief. Ready to get back to sleep? Find the solution to your nightmare weeds below.

THISTLES > One of the more aggravating weed families, thistles come in a variety of species. Of the four main types that cause the most concern for U.S. growers and ranchers, musk, bull and Scotch thistles are all biennials, while Canada thistle is a hardy perennial. Thistles can be easily identified by the spiny leaves and round, purple or pink flowers that resemble pincushions. Not only do these prickly pests compete with forage grasses for moisture and nutrients but they also, in effect, shrink pastures because cattle avoid grazing near them. Treatment > For bull and musk thistle, apply 16 to 20 fluid ounces of HighNoon® herbicide per acre or 1¼ pints per acre of GrazonPD3™ herbicide at the rosette stage, or apply 2 to 2⅔ pints per acre of GrazonPD3 from bolting to bud stage. For Scotch thistle, apply 16 to 20 fluid ounces of HighNoon per acre or 1 ¼ pints per acre of GrazonPD3 at the rosette stage, or 2 to 2⅔ pints per acre of GrazonPD3 from bolting to bud stage. For Canada thistle, apply 16 to 20 fluid ounces of HighNoon per acre or 2½ pints per acre of GrazonPD3 prior to bud stage. WESTERN RAGWEED > Western ragweed can be found throughout much of the United States but is particularly prevalent in the Southwest. Western ragweed grows into a bushy plant, 1 to 2 feet tall, with silvery-green leaves that may be covered with fine hairs. This drought-hardy weed is a prolific reproducer, so multiple treatments may be necessary for complete control. Treatment > Apply 16 to 20 fluid ounces per acre of HighNoon® herbicide, or 5 pints of GrazonPD3 herbicide per acre per 100 gallons of spray. For best control, apply to weeds that are actively growing but prior to flowering. CAROLINA AND WESTERN HORSENETTLE > Carolina and western horsenettle have erect stems, loosely branched and covered with gray hairs, and yellow spines. The weeds grow to 2 feet tall. Leaves are dark green, oval, pointed at tip, and sharply lobed or wavy- toothed. Clusters of white to purple flowers look like tomato flowers. Bloom is May to October when yellow-orange berries form. Berries are poisonous. Treatment > Apply 16 to 20 fluid ounces of HighNoon herbicide per acre; for Carolina horsenettle, apply 1¼ to 2⅔ pints per acre of GrazonPD3 herbicide (using higher rates when plants are taller than 4 to 6 inches); or for western horsenettle, apply 5 pints of GrazonPD3 per acre per 100 gallons of spray when target weeds are 2 to 3 inches tall through early flowering.

05 ™ ® Trademarks of Corteva Agriscience and its affiliated companies. GrazonPD3 ™ and Tordon ® 22K are Restricted Use Pesticides. Under normal field conditions HighNoon ® is nonvolatile. HighNoon has no grazing or haying restrictions for any class of livestock, including lactating dairy cows, horses (including lactating mares) and meat animals prior to slaughter. Label precautions apply to forage treated with HighNoon and to manure and urine from animals that have consumed treated forage. Consult the label for full details. HighNoon is not registered for sale or use in all states. GrazonPD3 is not for sale, distribution or use in Nassau and Suffolk counties in New York state. U Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Consult the label for full details. Always read and follow label directions. ©2025 Corteva.

HENBIT > This winter annual can be identified by its square stem and purple or pink flowers. Circular or heart-shaped leaves can be up to 5 inches long with rounded “teeth” at the edges. In crop-growing regions, controlling winter annuals is especially important, because they often serve as host plants for overwintering insect pests. Treatment > Apply 16 to 20 fluid ounces of HighNoon® herbicide per acre. Apply after fall germination, through late winter. LEAFY SPURGE > This deep-rooted perennial can quickly become established and crowd out desirable vegetation, making prevention and early treatment the most effective courses of action. Leafy spurge can be identified by its smooth, clustered stems, narrow leaves, with flowers enclosed by heart-shaped bracts. Treatment > Apply GrazonPD3™ at 1.2 to 2.5 quarts per acre broadcast by ground or air; apply at the true flower stage or during fall regrowth. Or, apply 2 pints of Tordon® 22K herbicide per acre or tank mix of 1.5 to 2 pints of Tordon 22K plus 1 quart of 2,4-D amine per acre. Apply at the true flower growth stage or during fall regrowth. Reapply Tordon 22K when level of control drops below 80%. MILKWEED > Milkweed has been identified by several Corteva Agriscience Range & Pasture Specialists as a weed of increasing significance. And while milkweed is generally unpalatable to most livestock, its toxicity makes it a weed worth watching out for. Treatment > Apply GrazonPD3 herbicide at 2⅔ pints per acre to actively growing milkweed less than 4 inches tall.

Don’t see your weeds on the list? No worries. Take a look at our Range & Pasture Western Rangeland Weed ID Guide to find your problem weeds and then reach out to your Corteva Agriscience Range & Pasture Specialist to develop a plan of attack.

Ask any producer what they’d like that they don’t have, and more than a few would likely say “a crystal ball.” Markets, trends, public sentiment, and the weather all seem to defy our predictions out of spite; producers who have a clear vision and are ready with a plan when things go pear-shaped are the ones who’ll have the best chance of success. With weed control being an integral part of pasture management and forage production, we asked Corteva Range & Pasture specialists for their thoughts on the issues that could impact weed control programs in the next five years. New and emerging weeds. While most producers aren’t seeing completely new species move in, many are seeing growing populations of weeds that are more prevalent in other areas. Whether due to a shifting climate or the cross-country movement of thousands of tons of hay, invasive weeds are getting the team’s attention. “As the southern climate moves further north, we’re seeing higher populations of some weeds. Northern states are seeing more of those annual weeds that producers in the Midwest might be more familiar with. We’re seeing higher kochia populations, for example. Eastern Cedar is a big one, too.” “As more regions are impacted by drought, they’re bringing in more hay from other areas and this is contributing to the spread of weeds.” “Poison hemlock has really exploded over the last five years; it’s a sizeable problem in my territory now. It’s crept into bareground areas and has really taken off.” Easier-to-use products. A View to the Future Corteva Range & Pasture Specialists offer their thoughts on the next five years in weed control.

There’s reason for optimism as well. Advances in formulating technology are helping manufacturers add new value to proven active ingredients and make products that are easier to apply, store or transport. The team’s thoughts: “A lot of product goes out by aerial application, so there’s potential for off- target movement. But new non-volatile or low-volatility formulations make applications easier; using a product that’s non-volatile doesn’t eliminate the risk, but it reduces it.” “As we bring to market new options, we know they have to be more user- friendly. We need weed and brush control options that are easier to use.” How can we prepare?

Without that crystal ball, producers may be wondering how best to prepare for the next half-decade’s worth of challenges. Our field team’s advice: “Have a plan. Things will change, and if your operation is dependent on any one thing, think about what happens and what you’ll do if that one thing changes.”

“Be adaptable. Be willing to switch from fall to spring spraying, for example. And think through every decision; the choices that producers make in the fall could impact their ability to sell hay the next summer.” “We need to be very efficient. We need to be able to produce more grass and turn that into more pounds of beef per acre. Efficiency is the name of the game, and weed control is an important part of that.” “Cattle prices are good right now; use these good years to really clean up your pastures so when the leaner years come – and they always do – you’ll be in a better position.” Photos Above, 01) “Cattle prices are good right now; use these good years to really clean up your pastures so when the leaner years come – and they always do – you’ll be in a better position.” 02) The keys to success over the next five years? Have a plan, be adaptable, and think through every decision. 03) Shifting weather patterns and cross-country hay shipments mean new strategies may be necessary for effective weed control. 02 03

A passion for raising cattle starts early. And so should the protection. Treat your pastures with Corteva Agriscience ™ herbicides to knock down weeds so your cattle can graze healthier and happier. It’s better for your herd, better for the land and better for your business. And by creating more sustainable acres, you’ll be protecting your passion for this work for generations to come. Find the latest innovations to help you at RangeAndPasture.com/StewardWestPortfolio .

GrazonPD3 ™ and Tordon 22K are a Restricted Use Pesticides. ™ ® SM Trademarks and service marks of Corteva Agriscience and its affiliated companies. Under normal field conditions, HighNoon ® and Milestone ® are nonvolatile. HighNoon and Milestone have no grazing or haying restrictions for any class of livestock, including lactating dairy cows, horses (including lactating mares) and meat animals prior to slaughter. Label precautions apply to forage treated with HighNoon and Milestone and to manure and urine from animals that have consumed treated forage. Not all products are registered for sale or use in all states. Consult the label for full details. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. © 2025 Corteva. RP - 23414 COR (11/24)

Optimize Your Investment & Your Pastures Corteva Agriscience is dedicated to helping cattle producers and land managers maximize the potential of every acre and every animal — every day. Corteva offers a complete portfolio of products and services designed specifically for controlling weeds and brush in permanent pasture and grazed rangeland, all supported by a sales and technical staff with unmatched industry knowledge.

Broadleaf Weed Control HighNoon ® herbicide Control weeds nearly anywhere they grow.

Milestone ® herbicide The most flexible herbicide for your acres.

Milestone® herbicide offers excellent invasive weed control, across a wide variety of use sites. It does so with little- to-no damage to grasses, forbs or other key members of the native plant community, allowing native habitats to be restored to their full potential. Tordon ® 22K herbicide All-purpose noxious weed control. Tordon® 22K herbicide provides all-purpose noxious weed control as well as basic invasive weed management. Brush Control Remedy ® and Remedy ® Ultra herbicides Brush control on your terms. For down-to-the-roots control of over 35 brush species, choose Remedy® and Remedy® Ultra herbicides. Both Remedy and Remedy Ultra can be applied in-season as foliar sprays or year-round in low-volume basal and basal cut-stump individual plant treatments (IPTs). Smaller package sizes (1 and 2.5 gallons) make Remedy herbicide ideal for IPT, while Remedy Ultra is available in 30- and 250-gallon package sizes. Surmount ® herbicide The smart choice for fence lines. Best choice for broad spectrum brush control in fence lines. Gentle to desirable grasses while controlling a broad spectrum of weeds.

HighNoon® herbicide offers an unmatched combination of use site flexibility, safety on desirable grasses and forbs, and an extensive weed control spectrum. As the new standard in western rangeland herbicides, HighNoon simplifies product selection and application–without sacrificing results. NovaGraz™ herbicide Control weeds, maintain desirable forages with NovaGraz™ herbicide. NovaGraz™ herbicide is a groundbreaking weed control solution that allows you to preserve the nitrogen-fixing capabilities of white clover and annual lespedeza while providing enhanced control of broadleaf weeds like ironweed, cocklebur, wild carrot, buttercup, biennial thistles, ragweeds, plantain, woolly croton, poison hemlock and many others.

GrazonPD3™ herbicide Control you can trust.

For control of broadleaf weeds and select brush species, trust GrazonPD3™ herbicide. With two proven active ingredients and a low-volatility, low-odor, high-load formulation, GrazonPD3 allows each sprayer load to cover more acres, without sacrificing results.

™ ® are trademarks of Corteva Agriscience and its affiliated companies. Spike ® is a registered trademark of Nutrichem used under license. GrazonPD3 ™ , Surmount and Tordon ® 22K are Restricted Use Pesticides. White clover and Annual lespedeza exhibit some initial injury (such as lodging and loss of vigor) but recover, with NovaGraz ™ application. Milestone ® have no grazing or haying restrictions for any class of livestock, including lactating dairy cows, horses (including lactating mares) and meat animals prior to slaughter. Label precautions apply to forage treated with Chaparral or Milestone and to manure and urine from animals that have consumed treated forage. Consult the label for full details. All products are not registered for sale or use in all states. GrazonPD3 is not for sale, distribution or use in Nassau and Suffolk Counties in New York State. Spike® 80DF is registered for range and pasture use only in AL, KS, LA, MO, MS, NM, OK and TX. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. State restrictions on the sale and use of Remedy ® and Remedy ® Ultra apply. Consult the label before purchase or use for full details. Always read and follow label directions. © 2025 Corteva.

Broadleaf Weed & Brush Control Chaparral™ herbicide Solve tough weed control problems.

Spike ® 20P herbicide Flexible, long-lasting brush control.

Spike® 20P herbicide offers long-lasting control of tough brush species like big sage, tarbush, creosote, and shinnery and other oaks, giving you increased carrying capacity and improved plant diversity and wildlife habitat. Add in flexible application methods, and you have a brush control product that can help get the most from every acre. Spike ® 80DF herbicide Total vegetation control. Spike® 80DF herbicide provides total vegetation control in a convenient dry flowable formulation, offering season-long performance for bareground sites.

Chaparral™ herbicide has the broadest spectrum of weed and brush control available for pastures and rangeland. Chaparral controls a range of tough species, including pigweed, buckbrush and Canada thistle; improves hay quality by removing Pensacola bahiagrass from bermudagrass; and is a valuable fescue toxicosis management tool. PastureGard ® HL herbicide One product to control tough weeds and brush. PastureGard® HL herbicide simplifies pasture improvement and renovation by offering two active ingredients — one for broadleaf weeds; one for brush — in one product. PastureGard HL controls tough weeds and woody plants like blackberry, rose and privet — giving you an effective, nonresidual option for weed and brush control. We have these great products to put to work on your operation and many more.

Ready to maximize the potential of your haying and grazing acres? Visit RangeAndPasture.com/StewardProducts to explore Corteva’s complete Range & Pasture portfolio.

The Future of Weed Control for Rangelands and Pastures

Although in most cases you won’t need to, the two products can be tank-mixed, giving users the option to combine their strengths while introducing new sites of action to enhance overall weed control. This versatility is crucial in the fight against herbicide resistance and ensuring long-term sustainability in your weed management plan. 3 Easier Handling and Mixing — In large-scale operations, the ease of handling and mixing herbicides can be a make-or-break factor. HighNoon herbicide comes in a liquid formulation. Liquid herbicides are generally easier to measure, pour, and mix. Another important consideration is packaging. HighNoon comes in gallon containers. This seemingly small difference makes a big impact when treating large areas. Fewer containers mean less waste, fewer trips to refill, and ultimately, greater efficiency. HighNoon also offers more room for error at lower application rates, reducing the risk of damaging desirable vegetation when trying to control noxious weeds at precision levels.

vegetation in the field. This profile makes it a simple—and beneficial – replacement in a lot of rangeland and pasture weed control programs. 2 More Flexibility in Application— Flexibility is key when managing diverse landscapes and HighNoon herbicide offers a degree of versatility that makes it stand out from other herbicides. One notable advantage is its ability to be sprayed right up to the water’s edge, which is something that Tordon® 22K herbicide users can’t do without restrictions. HighNoon is also designed to be gentle on grasses even when applied at rates four times higher than the labeled recommendation, making it a great choice for overlapping spot treatments where you want to avoid harming desirable vegetation. provides an ideal environment for raising cattle and families. For those accustomed to using Tordon 22K, HighNoon® presents a compelling alternative. While Tordon is a trusted option for tackling noxious and invasive weeds, HighNoon matches its effectiveness but provides additional flexibility and safety, especially around sensitive areas.

For ranchers and land managers, managing invasive and noxious weeds in rangelands and pastures is an ongoing challenge. This market offers a range of herbicides, each with its strengths, but there’s a new leader. HighNoon® herbicide is creating a buzz with its innovative approach and effectiveness. This article explores five reasons why switching to HighNoon would be a game changer for your land management program. 1 Innovative Active Ingredient for Superior Control — HighNoon herbicide includes the game- changing active ingredient Rinskor® active. HighNoon combines Rinskor with the active ingredient in Milestone® (aminopyralid). Rinskor works by attaching to a new binding site on plants for a new mode of action with some additional benefits in lower use rate, broader spectrum and improved environmental fate. Because it works selectively, HighNoon helps maintain desirable

™ ® are trademarks of Corteva Agriscience and its affiliated companies. GrazonPD3™ and Tordon ® 22K are Restricted Use Pesticides. Spike ® is a registered trademark of Nutrichem used under license. Under normal field conditions, HighNoon ® and Milestone ® are nonvolatile. HighNoon, Chaparral and Milestone have no grazing or haying restrictions for any class of livestock, including lactating dairy cows, horses (including lactating mares) and meat animals prior to slaughter. Label precautions apply to forage treated with Highnoon, Chaparrel, Milestone and to manure and urine from animals that have consumed treated forage. Consult the label for full details. All products are not registered for sale or use in all states. GrazonPD3 is not for sale, distribution or use in Nassau and Suffolk Counties in New York State. Spike ® 80DF is registered for range and pasture use only in AL, KS, LA, MO, MS, NM, OK and TX. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. State restrictions on the sale and use of Remedy ® and Remedy ® Ultra apply. Consult the label before purchase or use for full details. Always read and follow label directions. © 2025 Corteva.

4 Broader Spectrum and Faster Results — If you’re currently relying on Milestone® herbicide, it’s worth considering that HighNoon® herbicide offers all of Milestone’s benefits—and more. With the added power of Rinskor active, HighNoon kills weeds faster and offers a wider spectrum of control, allowing you to target more species while maintaining a reduced- risk profile. For land managers and ranchers, this translates to getting land back into productive use more quickly. Whether you’re managing pastures, rangelands, or non-crop areas like roadsides and industrial sites, broader control range of HighNoon and its quicker results can significantly cut down on time and resources needed for land rehabilitation. Additionally, if you like to add products with indaziflam for controlling annual grasses, HighNoon can work alongside them in the same pass, allowing you to address both broadleaf weeds and invasive grasses simultaneously. This combination approach not only improves efficiency but can reduce the number of treatments required, ultimately saving you time and money.

5 Enhanced Environmental Stewardship — One of the key trends in modern agriculture and land management is the increasing focus on environmental sustainability. The formulation of HighNoon herbicide is designed to help you meet these goals; its selectivity works to control invasive and noxious weeds while promoting desirable vegetation to create healthier rangelands and pastures over time. By using HighNoon in combination with other herbicides or in a targeted spot treatment strategy, you’re not only improving weed control but also fostering an environment where native grasses can thrive and out-compete invasive species. This can reduce the need for future treatments, making your weed management program more sustainable in the long run. With its improved environmental fate, HighNoon breaks down more quickly in the soil compared to some other products, reducing the risk of long-term environmental impact. Whether you’re managing conservation lands, pastures, or industrial sites, HighNoon offers an environmentally responsible solution that aligns with modern land management practices.

Why HighNoon Herbicide Should Be Your Go-To Herbicide In a market full of herbicides, HighNoon stands out as a versatile, effective, and environmentally responsible option for broadleaf weed and invasive grass control. With its new active ingredient, Rinskor active, HighNoon offers a broader spectrum of control, more application flexibility, easier handling, and faster results compared to legacy products like Tordon 22K, Milestone, and Chaparral™ herbicides. Switching to HighNoon® means embracing a future where you can control invasive weeds more efficiently while promoting healthier, more productive land. If you’re looking to enhance your weed management program, it’s time to consider HighNoon as your herbicide of choice. Learn more at: highnoonherbicide.com/steward

The Foundation to Rangeland Restoration.

HighNoon ® herbicide is the standard in western rangeland herbicides for the visionary land stewards of the Western US. Offering an unmatched combination of weed control spectrum, HighNoon is safe on desirable grasses and forbs, and boasts a broad use site flexibility. HighNoon provides significantly broader spectrum weed control than Milestone ® herbicide while still providing the same excellent control of

knapweed and thistles. Flexible Use Sites Include: • Rights-Of-Way • Rangeland • Permanent Grass Pastures and Hay Acres

• Reserve Program (CRP) • Non-Crop Land Areas

Learn more at HighNoonHerbicide.com/Steward where you will find all the news you can use, even an interactive product guide that you can download.

Visit us at highnoonherbicide.com

TM ® Trademarks of Corteva Agriscience and its affiliated companies. This reference guide is not intended as a substitute for the product label for the product(s) referenced herein. Product labels for the above product(s) contain important precautions, directions for use, and product warranty and liability limitations, which must be read before using the product(s). Applicators must be in possession of the product label(s) at the time of application. Always read and follow all label direction and precautions for use when using any pesticide alone or in tank-mix combinations. Under normal field conditions HighNoon ® is nonvolatile. HighNoon and Milestone ® have no grazing or haying restrictions for any class of livestock, including lactating dairy cows, horses (including lactating mares) and meat animals prior to slaughter. Label precautions apply to forage treated with Highnoon and Milestone and to manure and urine from animals that have consumed treated forage. Consult the label for full details. Not all products are registered for sale or use in all states. Always read and follow label directions. ©2025 Corteva. RP - 23417 COR (11/24)

Advertorial

Ranchers, Land Managers Have New Flexible Tool for Weed Control HighNoon ® Herbicide from Corteva Agriscience Stops Weeds Nearly Anywhere They Grow

Drought and drought recovery make winter the time to plan your spring weed control so you manage the toughest broadleaf weeds across the West. New HighNoon ® herbicide gives ranchers, land managers and county noxious weed specialists the flexible tool they need to help manage those challenges across

the diverse Western Rangeland. What the Experts Have to Say

“When winter moisture germinates new weeds or stimulates regrowth, eliminating those unwanted thirsty plants helps moisture go to growing grass and rangeland

recovery, rather than to growing weeds,” said Will Hatler, Range & Pasture field scientist with Corteva Agriscience. HighNoon ® herbicide provides a single product that controls more than 140 broadleaf weeds and delivers lasting residual control across a wide range of sites.

“In many states where noxious and invasive weeds pose the primary broadleaf weed threat, there is significant crossover among rangeland, pasture, roadsides and other non-crop use sites,” said Hatler. HighNoon gives ranchers, county noxious weed directors and vegetation managers working on grazing land, roadsides, utility substations or rights-of-way a weed control option that simplifies the job. “Residual control is important, especially during drought recovery,” Hatler said. “As moisture brings on new weed flushes, HighNoon stays on the job, keeping weeds out of the way so you get a strong start rangeland recovery.” HighNoon ® herbicide was developed to provide focus, emphasis, and product simplification for the Western rangeland market. It controls weeds and brush and contributes to invasive

grass management and fire prevention, improving forage growth and habitat maintenance. HighNoon ® is specifically labeled for Western rangelands and was created for ranchers, land managers, and stewards of the land. HighNoon, part of the Corteva Agriscience leading portfolio of crop protection solutions, is currently available in Colorado, Idaho, Kansas, Montana, Nebraska, North Dakota, Nevada, Oregon, South Dakota, Utah, Washington and Wyoming. Go to www.HighNoonHerbicide.com/Steward to download an interactive PDF that has extended information on the benefits you get with HighNoon.

Your Guide to Productive Pastures & Healthy Cattle See how herd health and grazing management go hand in hand. Utilize a variety of practices to make that happen. Profitability for cow-calf producers hinges on the number of calves sold, the price those calves bring at market and what it costs to get them there. Each of these factors fluctuates from year to year. One constant, however, is how the grazing resource impacts those variables. “A high-quality forage base will keep breeding stock in good body condition, which improves conception, increases milk production and boosts daily gains,” says Dr. Sam Ingram, a Range & Pasture field scientist with Corteva Agriscience. Simply put: More grass means more pounds of beef per acre. Properly conditioned cows breed back quicker, and tighter calving windows produce more-uniform groups of calves that often command a premium at market. Implementing pasture improvement practices, such as grazing management, broadleaf weed control and proper fertility, can significantly increase forage quantity and quality and improve pasture utilization for maximum beef production,” Ingram says. Another Constant — Herd Health In addition to a sound pasture management program, herd health must be prioritized to keep cows in production and maximize the number of calves on the ground each year. “The health and success of your calves depend on the care your cows and heifers receive from the start,” says Dr. Dan Tracy, a beef technical services veterinarian with Zoetis. “The right nutritional plane leading up to the breeding season lays the foundation for cows and replacement

heifers to be in the best condition for reproductive success. But we must also incorporate sound herd health practices that boost immunity and mitigate risks along the way.” The good news is that a comprehensive herd health program and your pasture improvement efforts can work in tandem to boost herd performance and drive profitability. “It comes down to finding the right mix of practices and products that fit the management style of your herd,” Tracy says. Breaking down your to-dos by season can help you plan for success. Corteva collaborated with Zoetis to create a seasonal guide that brings together herd health and pasture management considerations. The table below outlines key protocols for boosting pasture productivity and animal health throughout the year.

Season

Pasture

Animal Health

A well-planned heifer and cow vaccination program builds immunity to help protect the cow and her unborn calf through proper prebreeding vaccinations and protect your synchronization investment. TIP > Utilizing a reproduction synchronization program that includes Lutalyse® HighCon Injection (dinoprost tromethamine injection), Factrel® Injection (gonadorelin injection) and Eazi-Breed™ CIDR® Cattle Insert helps support higher fertility cycles by enabling easier, more-accurate heat detection so heifers and cows can come into heat and be bred in a narrower window of time. Improving breeding efficiencies can create a tighter calving window, which can lead to more-consistent calving ages and calf size uniformity. Meanwhile, prebreeding vaccinations can help protect the cow herd from costly reproductive diseases that can challenge breeding efficiencies.

Monitor pastures early — even before they start to green up. “This practice allows you to address potential problems while weeds are still small,” Ingram says. “Watch for early emerging annual weeds and biennial thistles. Treating early allows grasses more time and space to grow, which will help suppress any additional weeds.” TIP > Use a proven herbicide with residual control, such as HighNoon® or GrazonPD3™ herbicide, to control new weed flushes that pop up well into the grazing season.

™ ® Trademarks of Corteva Agriscience and its affiliated companies. ™ ® HighNoon, GrazonPD3 and UltiGraz are trademarks and service marks of Corteva Agriscience and its affiliated companies. GrazonPD3™ is a Restricted Use Pesticide. Under normal field conditions, HighNoon ® is nonvolatile. HighNoon has no grazing or haying restrictions for any class of livestock, including lactating dairy cows, horses (including lactating mares) and meat animals prior to slaughter. Label precautions apply to forage treated with HighNoon and to manure and urine from animals that have consumed treated forage. Consult the label for full details. HighNoon is not registered for sale or use in all states. GrazonPD3 is not for sale, distribution or use in Nassau and Suffolk counties in New York state. UltiGraz SM with fertilizer is available for use with specific herbicides in the states of AL, AR, CO, FL, GA, HI, IA, ID, KS, KY, LA, MN, MO, MS, MT, NC, ND, NE, NV, OK, OR, SC, SD, TN, TX, UT, VA, WA, WI, WV and WY. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. © 2025 Corteva. Factrel, Lutalyse and Valcor are the property of Zoetis Services LLC or a related company or a licensor. CIDR is a registered trademark of InterAg.

Season

Pasture

Animal Health

After a winter in pens and barns, your herd is ready to go back to pasture. But delaying turnout as long as possible can give stressed pastures more time to recover. TIP > Don’t forget to feed your pastures. Fertilizer alone grows pounds of grass, but it also grows pounds of weeds. UltiGraz℠ Pasture Weed & Feed brings together fertilizer and weed control for increased forage production and the potential to raise more pounds of beef per acre. Combining the two saves an application expense and can help you make the most of your lowest-cost feed source — your grazing acres. A lot is asked of each of your cows, with a calf at her side and another in gestation. Protect your pastures’ nutritional plane to meet herd energy requirements. “Now is the time to treat many perennial weeds, including Canada thistle, tall ironweed and western ragweed,” Ingram says. “Undesirable weeds can leave your grass competing for valuable nutrients and leave your herd hungry.” TIP > While you’re treating broadleaf weeds, resist the temptation to treat brush and other woody plants too early. Take time to ensure undesirable brush and woody plants are fully leafed out and actively growing, which usually doesn’t start before mid- to late June. Providing quality grazing from the start can help your calves get ahead too. “The more nutritious, abundant grazing you provide up through weaning, the faster, more efficiently calves gain with less reliance on more expensive supplemental feeding,” Ingram says. TIP > Large pastures limit rotational grazing possibilities. Consider crossfencing to facilitate cattle movement based on the level of forage production and allow a rest period for the previously grazed pasture. This can increase utilization and increase per-acre production. Highly nutritious forage, whether grazed or harvested, is critical to get fall–calving cows in optimum condition for timely breedback. It’s even more important if you are using synchronization protocols to AI-breed those cows. Take steps to help your grasses recover from the grazing season and prepare for winter. “Perennial species are great candidates for fall treatment,” Ingram explains. “You can get better control of thistles, dogbane, milkweeds and horsenettle with well-timed fall applications. Late- fall application also can be very effective on seedling biennials, such as plumeless and musk thistle and common burdock, and winter annuals.” TIP > Any fall moisture will germinate new weed seedlings. Most are easier to control at this stage, which makes herbicide applications especially effective during this season.

If you have cattle grazing, then you also have a risk of exposure to internal parasites. A parasite control program is critical for cows so they can utilize nutrients in the forage. TIP > Control of internal and external parasites is an essential building block for healthy cattle. Zoetis offers Valcor® (doramectin and levamisole injection), dual- ingredient, single-dose cattle dewormer that attacks both internal and external parasites. In a study, heifer calves treated with Valcor demonstrated 9.3 pounds more gain over 56 days when compared with heifers treated with ivermectin. 1 Summer grazing is a quiet time. Healthy pastures can lead to the best nutrition available for a healthy herd. TIP > Proper pasture management prevents overgrazing that increases the risk of picking up internal parasites.

Fall preconditioning vaccinations should be top of mind for the calves before they are weaned. “The antibodies from colostrum are gone once calves reach weaning time,” Tracy says. “Administering efficacious calf vaccinations prior to weaning will help boost immunity for the next, more-stressful phases of their life.” TIP > Administering respiratory vaccinations and a dose of parasite control while the calves are still at the side of the cow and about four weeks before weaning is ideal. Consult your herd veterinarian to discuss protocols that align with your herd’s vaccination history. A timed artificial insemination program can help tighten the calving window, and the labor requirements that go with it. Your local veterinarian is a great person to consult with any questions on protocols and products that make sense for your herd. “A synchronization program helps define the breeding season and frontload calving as much as possible,” Tracy says. “This practice not only provides labor efficiencies during calving, but it also allows calves more time on the cow and more pounds of beef produced at the end of the season.” TIP > When implementing a synchronization program, follow these four steps: 1. Work with your veterinarian to set up an on-label synchronization protocol that best fits your herd. 2. Make sure you understand the protocol and when products are administered. 3. Keep accurate records of the cows and when products are administered so cows are inseminated at the right time. 4. Use the smallest gauge needle allowed — an 18- or 20-gauge needle, 1.5 inches long. This allows the injection to be placed deep in the muscle. Replace the needle often to avoid abscesses.

There are many variables and practices that can contribute to more pounds of beef produced per acre. But Ingram and Tracy recognize each herd is unique, with different management practices already in place. “There is more than one way to manage a successful cattle operation,” Tracy says. “Be sure to take full advantage of local expertise to identify and customize management protocols for your herd.” He encourages producers to regularly consult their local veterinarian, nutritionist and Corteva Range & Pasture Specialist for best results. Scan the QR code to learn more about how herd health and grazing management go hand in hand.

6 Tips for Effective Weed Control Get the best return on your pasture weed control investment. Herbicides work best when used correctly. To get the best return on investment from your pasture weed spraying, experts with Corteva Agriscience offer six tips. 1 Identify the Weed Problem. Your best choice of herbicides, application rates and timing vary by target weed species and whether you have nontarget white clover. For broadleaf weed control, HighNoon® herbicide is the product of choice. It controls more than 140 broadleaf weed species and provides soil residual activity to control new germinations for several weeks after application. But HighNoon also controls several legumes that might be desirable in a pasture. In areas where white clover and annual lespedeza are wanted, NovaGraz™ herbicide preserves those species – and all their benefits. As a nonresidual herbicide, NovaGraz is an excellent choice where extended weed control is not desired. 2 Use a Calibrated Sprayer or a Professional Applicator. Proper calibration avoids both the waste and expense of overapplication, and it prevents reduced control from underapplication. Get your money’s worth. Don’t guess. Calibrate. 3 Spray at the Right Time With the Right Rate. Annual weeds in pastures are generally most susceptible early in the season when they’re small and actively growing and when soil moisture is adequate. Using HighNoon will provide longer soil residual activity than any other pasture herbicide and will control weeds that germinate for several weeks after spraying. After that, competition and soil shading from a healthy grass cover often provide season-long control.

Photos 01) Buckbrush 02) Big Mountain Sage 03) Mesquite 04) Curlycup Gumweed 05) Giant Ragweed 06) Wormwood 07) Salt Cedar

4 Recognize That Drought-stressed or Mature Weeds Will Be More Difficult to Control. Effectiveness may be reduced if weeds don’t have adequate moisture and aren’t rapidly growing when you spray. In a dry year, spraying early will improve results and help your grass capture scarce moisture. Weed-free pastures always recover faster from drought. The key is to spray early when conditions are acceptable. For late applications or less favorable conditions, you’ll need to increase the application rate for satisfactory control. 5 Follow Label Directions for Application and Mixing. For ground broadcast, apply the recommended rate of herbicide in 10 to 20 gallons of total spray mixture per acre. Use the recommended rate of an agricultural surfactant to thoroughly wet the foliage; NovaGraz™ herbicide, for example, requires methylated seed oil (MSO) as a surfactant. Consider a drift control additive to reduce drift and improve deposition. 6 Remember Soil Residual Activity and Plant Residue. Although HighNoon® herbicide can provide weed control for several weeks in permanent grass pasture, it should not be used on cropland or on land to be rotated to crops. Most broadleaf crops are more sensitive to residual activity than weeds. Those crops may be affected if planted within two years, or longer, of spraying. Don’t plant a broadleaf crop until an adequately sensitive field bioassay shows the crop will not be harmed. Cereals and corn, however, can be planted one year after treatment. Remember grasses treated with any soil residual herbicide may carry herbicide residue that can be transferred to the soil by hay or by livestock manure or urine. Contact your local retailer or Corteva Agriscience Range & Pasture Specialist for more localized recommendations to customize your pasture improvement.

Check out the Range & Pasture Western Weed & Brush ID Guide for more information!

™ ® Trademarks of Corteva Agriscience and its affiliated companies. White clover and Annual lespedeza exhibit some initial injury (such as lodging and loss of vigor) but recover. Under normal field conditions, HighNoon ® is nonvolatile. HighNoon has no grazing or haying restrictions for any class of livestock, including lactating dairy cows, horses (including lactating mares) and meat animals prior to slaughter. Label precautions apply to forage treated with HighNoon and to manure and urine from animals that have consumed treated forage. Consult the label for full details. HighNoon and NovaGraz ™ are not registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. ©2025 Corteva.

Grow More High-Quality Hay Hay is valuable. Raise it right; treat it right. Although grazing is the most economical way to harvest forages, stored hay often is critical in beef cattle production. It’s important to maximize hay quantity and quality, whether you’re putting it up and marketing it or feeding it on farm to keep your high-value beef cows in condition. “Harvested hay is an investment,” says Sam Ingram, a Range & Pasture field scientist with Corteva Agriscience. “Sound agronomic practices, along with properly harvesting and storing hay, will help boost returns.” Start Strong Whether you’re managing an existing hay field or establishing a new one, it’s important to pull soil samples and adjust fertility according to test results. When seeding hay ground, be sure to select high-quality seed. “Weed control plays a critical role in hay production,” Ingram says. “Weeds impact hay quantity by competing for moisture and nutrients. They can reduce hay quality by slowing drydown. In the bale, weeds reduce feed value, and some, such as poison hemlock, remain poisonous.” The good news is the same Corteva Range & Pasture offerings you count on for your grazing acres also are labeled for use in hay production. Ingram recommends you start with these options, designed to suit your individual needs: • HighNoon® herbicide. Get broad- spectrum control of broadleaf weeds, especially for those that frequently pop up in hay fields, such as plantain, poison hemlock, ragweed and thistles.

• NovaGraz™ herbicide. The latest innovation from Corteva, NovaGraz is the first product to control broadleaf weeds while preserving white clover and annual lespedeza and provides a non-residual herbicide option to hay producers. • PastureGard® HL herbicide. In situations where dogfennel or woody species threaten your hay fields or where you prefer a nonresidual herbicide, go with PastureGard HL for control of broadleaf weeds and brush in a single pass. Cut It Right; Store It Right Time is of the essence in high-quality hay production. University of Missouri research shows that most forages lose 20% of their total digestible nutrients and 40% of their protein just 10 days after their optimal harvest stage 1 . For grass hay, the cutting window is: • The boot stage (when undeveloped seed heads are near emergence from the top of their stems) for tall fescue, timothy and most other forage grasses. • After seed heads have emerged for brome and orchardgrass. Forage plants grow and mature quickly, especially under favorable spring conditions. That first cutting can sneak up on us. Make sure prepping hay equipment is on your spring to-do list. And then don’t overlook how you will handle and store that hay. Here are a few considerations: • Stay sharp. Clean, efficient cutting reduces leaf loss due to shattering and prevents stem damage. Damaged stems slow plant recovery, which can delay the next cutting. Sharpen or replace all blades, sickle sections and cutting mechanisms. Look for damaged or worn sickle guards.

• Inspect equipment thoroughly. Check belts and hoses for cracks and wear. Properly tighten chains and belts. Make sure tires are properly inflated to prevent wear and minimize soil compaction. • Reduce storage losses. Reducing waste is one of the best ways to hold down feed costs. Obviously, hay stored outside suffers the greatest losses — as high as 25% between dry matter and feed value. Evaluate economical options for covered hay storage, which might pencil out easier than you think. If you must store hay outside: use well-drained sites; allow a minimum of 3 feet between bale rows; stay away from trees and other shady areas; and feed outdoor- stored hay first. “Hay-feeding season is a critical time in the livestock production cycle,” Ingram says. “Breeding stock must maintain or increase body condition. High-quality hay is an important component in least-cost feeding programs. Be sure to give it the attention it deserves.”

1 Henning JC, Wheaton HN. Making and Storing Quality Hay.University of Missouri Extension website. https://extension.missouri.edu/ publications/g4575.

™ ® Trademarks of Corteva Agriscience and its affiliated companies. Under normal field conditions, HighNoon ® is nonvolatile. HighNoon has no grazing or haying restrictions for any class of livestock, including lactating dairy cows, horses (including lactating mares) and meat animals prior to slaughter. Label precautions apply to forage treated with HighNoon and to manure and urine from animals that have consumed treated forage. Consult the label for full details. Not all products are registered for sale or use in all states. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions. ©2025 Corteva.

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