Range & Pasture Southwest Rancher Guide

RANGE & PASTURE Southwest Rancher Guide

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Choose the Right Tools.......................................................................................................4-5 Broadleaf Weed Control Using Broadcast Applications...........................................6-10 Control Bahiagrass and Broadleaf with Chaparral™ Herbicide....................................11 Broadleaf Weed Control Using Individual Plant Foliar Applications..........................12 Broadcast Applications on Brush..................................................................................13-15 Broadcast Brush Applications with Spike ® 20P Herbicide.......................................15-16 Mow or Spray Brush.................................................................................................................17 Individual Plant Foliar Application Rates.....................................................................18-21 Individual Plant Basal Bark Applications....................................................................22-23 Individual Plant Whorl Sprays for Yucca and Palmetto..........................................24-25 Soil-Applied Spot Applications with Tordon ® 22K Herbicide........................................26 UltiGraz SM Pasture Weed & Feed...........................................................................................27 LandVisor™ Advanced Brush Management.......................................................................28

This guide is published by Corteva Agriscience™ to provide you with helpful information on managing weeds and brush on grazing lands, grass hayfields and Conservation Reserve Program (CRP) acres.

Common Measurement Conversions

1 gallon (gal)

= 4 quarts (qt)

1 gallon (gal)

= 8 pints (pt)

1 gallon (gal)

= 128 fluid ounces (fluid oz)

1 quart (qt) 1 quart (qt)

= 2 pints (pt)

= 32 fluid ounces (fluid oz) = 36 fluid ounces (fluid oz) = 24 fluid ounces (fluid oz)

2.25 pints (pt)

1.5 pints (pt)

1.25 pints (pt)

= 20 fluid ounces (fluid oz)

1 pint (pt)

= 16 fluid ounces (fluid oz) = 12 fluid ounces (fluid oz)

0.75 pint (pt)

1 pound (lb)

= 16 ounces (oz.)

Choose the Right Tools Herbicide

• Attributes

Featuring the first new active ingredient for pastures and rangeland in nearly 15 years. DuraCor ® herbicide brings livestock producers and land managers the broadest spectrum broadleaf weed control available for their grazing acres — one that’s loaded with benefits. DuraCor is powered by Rinskor ™ active, a reduced risk herbicide that won the American Chemical Society’s Green Chemistry Challenge award. The American Chemical Society’s Green Chemistry award, given to companies or institutions that have developed a new process or product that helps protect public health and the environment, is the United States’ most prestigious award program for green chemistry innovations. Common usage rate is 16 fluid ounces per acre. Making pasture improvement easy. GrazonNext ® HL herbicide is the easiest way to get broadleaf weeds out of the way of pasture production. It provides a simple, lasting solution for the toughest pasture and rangeland weeds and clears the way for more forage, meaning greater flexibility in a grazing program and higher per-acre beef production at the lowest cost possible. Specialized broad-spectrum weed, brush and grass management. Chaparral ™ herbicide is the broadest spectrum weed and brush control product available for rangeland and pastures. It is the simple answer for several significant, unique needs, such as reducing the impact of toxic fescue through seedhead suppression and improving hay quality by removing Pensacola bahiagrass from bermudagrass. The standard in pricklypear control. Pricklypear, by nature, is notoriously slow to show symptoms, die and melt away. Faster symptoms with MezaVue ® herbicide deliver a piece-of-mind benefit that the herbicide is working. Faster control means native grasses can respond sooner to get rangeland back into production. The more cactus you control, the more of that area you open to grazing.

Choose the Right Tools Herbicide

• Attributes

The standard in mesquite control. Sendero ® herbicide is the standard in mesquite control ™ , offering greater than 15 percent better control and more consistency than the old standard. Sendero does not harm grasses and many desirable brush species. Controlling mesquite with Sendero results in increased grass production and improved wildlife habitat.

Premium broadleaf weed control. Surmount ® herbicide provides excellent broad-spectrum broadleaf weed control without 2,4-D. Surmount® herbicide also delivers outstanding pricklypear and cholla cactus control.

Simply the best choice against brush. Remedy ® and Remedy ® Ultra herbicides provide convenient, flexible, long-lasting control of more than 35 brush species. Whether protecting grazing acres from encroaching brush, maintaining valuable fence lines or reclaiming overgrown pastureland, Remedy and Remedy Ultra gets the job done.

Pasture weed and brush control with a single product. PastureGard ® HL herbicide gives ranchers one flexible product that takes out broadleaf weeds and brush. Whether it’s protecting, improving or restoring valuable grazing acres, weed and brush control with PastureGard HL clears the way for more forage, better land utilization and increased property values — all while helping ranchers raise more pounds of beef at the lowest cost possible. General broadleaf control solution. GrazonPD3 ™ herbicide is a new, broad spectrum residual herbicide that controls more than 70 weeds, as well as suppresses select brush species. Containing 2,4-D Choline and Picloram, GrazonPD3 is backed by trusted and proven active ingredients, providing peace of mind.

Broadleaf Weed Control Using Broadcast Applications Herbicide and Timing Recommendations | ANNUAL WEEDS Important Notes—Annual and Biennial Weeds Match herbicide rate with the growth stage of weeds and difficulty of control. Within the herbicide’s labeled range, increase the application rate as plants become more mature, when weed foliage is tall or dense or when growing conditions are less than favorable. Use enough spray volume. Recommended spray volume is 10 to 25 gallons per acre for ground broadcasts or 2 to 5 gallons per acre by air. Higher spray volumes in the range generally provide better coverage and better control. Use the recommended rate of an agricultural surfactant, plus a drift control agent where needed. NOTE —The lowest cost feed you can buy is the extra grass you get from spraying weeds. As a rule of thumb, for every pound of weeds you control, you’ll get an extra pound of grass. Annual Weed Species • Herbicide • Product Per Acre • Time to Treat

Use lower rate when weeds are small and actively growing. Increase rate as season progresses and plants become more mature, weeds 4 to 6 inches, good moisture. Early applications are recommended when weeds are small and actively growing. Increase rate as season progresses and plants become more mature, weeds 4 to 6 inches, good moisture.

DuraCor ® OR Chaparral ™ OR GrazonNext ® HL DuraCor OR Chaparral OR GrazonNext HL

12 to 16 fluid oz/A OR 1.5 to 2.0oz/A OR 24 to 32oz/A 12 to 16 fluid oz/A OR 2.0oz/A OR 24 to 32oz/A

Bitter Sneezeweed

Broomweed (annual)

Use lower rates early in season, weeds 4 to 6 inches, good moisture.

16 to 20 fluid oz/A OR 24 to 32oz/A

DuraCor OR GrazonNext HL

Buffalobur

16 to 20 fluid oz/A OR 1.5 to 2.5oz/A OR 24 to 32oz/A

DuraCor OR Chaparral OR GrazonNext HL DuraCor OR Chaparral OR GrazonNext HL

Use lower rates early in season, weeds 4 to 6 inches, good moisture.

Buttercup, curly

Use lower rate when weeds are small and actively growing. Increase rate as season progresses and plants become more mature, and weeds 4 to 6 inches, good moisture.

12 to 16 fluid oz/A OR 2.0oz/A OR 24 to 32oz/A

Cocklebur

Broadleaf Weed Control Using Broadcast Applications Herbicide and Timing Recommendations | ANNUAL WEEDS Annual Weed Species • Herbicide • Product Per Acre • Time to Treat

Use lower rate when weeds are small and actively growing. Use higher rate on 10-to-12 inch tall, mature weeds with adequate leaf surface.

16 to 20 fluid oz/A OR 1.5 to 2oz/A OR 24 to 32oz/A

DuraCor ® OR Chaparral OR GrazonNext HL

Croton (woolly)

Winter Annual - Use lower rate in early season up to 3 buttons. Efficacy may decrease after this stage. Increase rate as season progresses until senescence 16 fluid ounces of DuraCor ® herbicide per acre on plants less than 4 inches tall. Taller, more mature plants require 20 fluid ounces of DuraCor herbicide per acre with 1% MSO per volume of water used . Once the plant branches, do not treat. Apply 16 to 20 fluid ounces of DuraCor herbicide per acre when all weeds emerge. Use DuraCor at 20 fluid ounces for mature plants.

DuraCor OR Chaparral ™ OR GrazonNext ® HL

16 to 20 fluid oz/A OR 1.5 to 2oz/A OR 24 to 32oz/A

Horsemint, beebalm

DuraCor OR Chaparral

16 to 20 fluid oz/A OR 2.0 to 2.5oz/A

Marshelder, sumpweed

DuraCor OR GrazonNext HL

16 to 20 fluid oz/A OR 24 to 32oz/A

Pigweed, spiny amaranth

Apply 16 to 20 fluid ounces of DuraCor ® per acre + 0.5 lb ae per acre, 2,4-D amine or 32 ounces of GrazonNext ® HL per acre.

DuraCor OR GrazonNext HL

16 to 20 fluid oz/A OR 32oz per acre

Lanceleaf ragweed

DuraCor ® OR Chaparral OR GrazonNext HL

12 to 16 fluid oz/A OR 2 to 2.5oz/A OR 32oz/A

Ragweed (annual or common)

Use lower rates early in season, weeds 4 to 6 inches, good moisture.

Broadleaf Weed Control Using Broadcast Applications Herbicide and Timing Recommendations | ANNUAL WEEDS Annual Weed Spe- cies • Herbicide • Product Per Acre • Time to Treat

Apply 16 to 20 fluid ounces of DuraCor ® herbicide per acre (with 1% MSO) or 3 pints of Surmount ® herbicide per acre. Apply when weeds are small and actively growing. Increase the rate as the season progresses and plants become more mature.

16 to 20 fluid oz/A OR 32oz/A

DuraCor ® OR Surmount ®

Snow-on-the mountain

DuraCor OR Chaparral ™ OR GrazonNext HL DuraCor OR GrazonNext HL OR Surmount ®

16 fluid oz/A OR 1.5 to 2.0oz/A OR 24 to 32oz/A 16 to 20 fluid oz/A OR 32oz/A OR 24 to 48oz/A

Spray when plants are 8 to 10 inches tall.

Sunflower (annual)

Spray when plants are 2 to 6 inches tall before flowering.

Upright coneflower

Apply GrazonNext ® HL herbicide per acre. Spray prior to bloom in spring when weeds are 4 to 6 inches and there is adequate moisture.

Western bitterweed

GrazonNext HL 32oz/A

Broadleaf Weed Control Using Broadcast Applications Herbicide and Timing Recommendations | BIENNIAL WEEDS Biennial Weed Species • Herbicide • Product Per Acre • Time to Treat

DuraCor OR Chaparral OR GrazonNext HL DuraCor OR GrazonNext HL

12 to 16 fluid oz/A OR 2oz/A OR 24 to 32oz/A 16 to 20 fluid oz/A OR 24 to 32oz/A

Treat in vegetative state prior to bloom, add 0.5 lb of 2,4-D late season through early flower. Apply during the rosette stage early in the season. Fall to early winter applications can be made to rosettes prior to the first hard frost.

Bull Thistle Musk Thistle Plumeless Thistle

Scotch Thistle

Broadleaf Weed Control Using Broadcast Applications Herbicide and Timing Recommendations | PERENNIAL WEEDS Important Notes—Perennial Weeds Match rate and timing to the targeted perennial weed. Spray timing varies considerably for perennial broadleaf weeds. Within a labeled application rate range, increase the rate as plants become more mature, when weed foliage is tall or dense or when growing conditions are less than favorable. Use enough spray volume. Recommended spray volume is 10 to 25 gallons per acre ground broadcast or 2 to 5 gallons per acre by air. Higher spray volumes in the range generally provide better coverage and better control. Use the recommended rate of an agricultural surfactant, plus a drift control agent where needed. Perennial Weed Species • Herbicide • Product Per Acre • Time to Treat Antelopehorn Milkweed Surmount ® 48oz/A Apply to vegetative stage prior to bloom.

Chaparral ™ OR Tordon ® 22K OR Surmount

3.3oz/A OR 16oz/A OR 48oz/A

Broom Snakeweed (Perennial Broomweed)

Spray during and after full bloom in fall, with good moisture.

DuraCor ®

16 to 20 fluid oz/A + 16oz 2,4-D Amine OR 32oz/A OR 24 to 48oz/A

Spray when plants begin to flower in the spring.

OR GrazonNext ® HL OR Surmount DuraCor OR GrazonNext HL OR Surmount

Bullnettle

16 fluid oz/A OR 24 to 32 oz/A OR 24 to 48 oz/A

Spray during or after full bloom in the summer, with good moisture.

Carolina horsenettle

Broadleaf Weed Control Using Broadcast Applications Herbicide and Timing Recommendations | PERENNIAL WEEDS Perennial Weed Species • Herbicide • Product Per Acre • Time to Treat

16 fluid oz/A OR 24 to 32oz/A

DuraCor ® OR GrazonNext HL

Spray when plants are 4 to 6 inches tall.

Dandelion

GrazonNext HL OR PastureGard ® HL OR Surmount DuraCor OR GrazonNext ® HL

32oz/A OR 16 to 24oz/A OR 24 to 48oz/A

Spray when plants are 8 to 10 inches tall.

Dogfennel

16 to 20 fluid oz/A OR 24 to 32oz/A

Horehound

Apply when actively growing.

Begin applications when weeds are a minimum of 10-12 inches tall and actively growing. Continue applications though Fall with good moisture and active growth. The use of higher rates will be needed for late season applications and dense stands. Use a minimum of 10 GPA by ground and 5 GPA by air for best results.

16 to 24oz/A OR 16 to 24oz/A OR 3.3oz/A

PastureGard HL OR Remedy ® OR Chaparral

Sericea lespedeza

DuraCor OR GrazonNext HL

16 to 20 fluid oz/A OR 24 to 32oz/A

Silverleaf nightshade

Spray when plants begin to flower in the spring.

Apply in mid-summer through fall when plants have mature foliage.

Oldmans beard MezaVue ®

32oz per acre/A

Upright Prarie Coneflower

Spray plants when they are 2 to 6 inches tall before bloom.

DuraCor ®

16 to 20 fluid oz/A

DuraCor OR GrazonNext ® HL

16 to 20 fluid ounces/A OR 24 to 32oz per acre/A

Apply when plants are small and actively growing before bloom.

Western Ragweed

Control Bahiagrass and Broadleaf Weeds with Chaparral™ Herbicide

Notes Bahiagrass may have its place as low input, low yield pasture, but many bermudagrass producers consider it a weed. Bahia reduces forage yields from bermudagrass pastures and hay fields, lowers bale quality and makes hay harder to market. Broadleaf weeds in a bermudagrass have a similar depressing effect on yield, quality and marketability. Two Birds, One Stone You can achieve cleaner bermudagrass season long with one early season application. Chaparral ™ herbicide controls both Pensacola bahia and a wide spectrum of broadleaf weeds. Chaparral is a unique dry formulation intended to be mixed with water. To control Pensacola bahiagrass in established bermudagrass, apply Chaparral at the labeled rate of 2 to 2.5 ounces/A. Spray after greenup in the spring, but before bahiagrass seedhead formation. Spray only when environmental conditions favor grass growth.

No Tank-Mix Partners Do not add 2,4-D to Chaparral in a tank mix or use liquid fertilizer as a carrier unless you’re willing to accept a lower level of bahiagrass control. Chaparral in water with surfactant is the most effective mix on Pensacola bahiagrass.

Broadleaf Weed Control Using Individual Plant Foliar Applications Individual Plant Foliar Application Rates Herbicide Product Rate Per 100 Gallons of Water

0.5 – .75 Gallons

3.3 – 6.6 Ounces

1 Gallon

Notes Weed infestations often get a start in a particular area. It may be from weed seed washed in or emergence from bare soil in high-traffic sites around pens or water. In those situations, a hand-applied foliar application can keep a localized population from seeding an entire pasture. This is especially true for noxious, highly invasive weeds like thistles.

In Pasture Weed Species Controlled

Bitter sneezeweed

Silverleaf nightshade

Western horsenettle

Buffalobur

Marshelder

Thistles

Broom snakeweed (Perennial Broomweed)

Plantain (Talloweed)

Upright coneflower

Western ragweed

Croton

Smartweed

Broomweed (Annual)

Carolina horsenettle

Prairie geradia

Sunflower (Annual)

Western bitterweed

Wild carrot

Broadcast Applications on Brush

Important Tips 1. Read and follow all label directions and restrictions. 2. Properly calibrate equipment.

3. Use enough spray volume. Recommended spray volume is 10 to 25 gallons per acre ground broadcast or 4 to 5 gallons per acre by air. Higher spray volumes in the range generally provide better coverage and better control. Use the recommended rate of an agricultural surfactant, plus a drift control agent where needed. 4. Apply herbicides when environmental conditions are as close to optimum as possible. Use the recommended rate of an agricultural surfactant, plus drift control agent where needed. Do not apply with liquid fertilizer. Consult your local Natural Resource Conservation Service office, County Extension Agent or a Corteva Agriscience representative for more details concerning proper timing. 5. For woody species, make sure the target plant has good foliage. Insects, hail, freezing weather or drought may damage plant foliage reducing your degree of control. 6. For Macartney rose, multiple treatments may be needed for control. Broadcast Brush Applications Brush Species • Herbicide • Product Per Acre • Time to Treat

Apply in spring when leaves are fully expanded.

GrazonPD3 ™ OR Surmount ®

80oz/A OR 48oz/A

Baccharis (willow)

16 to 20 fluid oz/A + 16oz/A OR 3.3oz/A OR 32oz/A + 16oz/A

DuraCor + PastureGard ® HL OR Chaparral ™ OR GrazonNext HL + Remedy ®

Apply to mature leaves, after fruit drop.

Blackberry

Apply late summer to fall, with mature leaves.

Blackbrush Chaparral + Tordon 22K

3.3oz/A + 32oz

Broadcast Brush Applications

• Product Per Acre

Brush Species • Herbicide

• Time to Treat

GrazonNext ® HL + Remedy ®

24 to 32oz/A + 16oz/A

Optimum application time is May to July.

Catclaw acacia

Apply to mature leaves after fruit drop.

Dewberry

Chaparral ™

3.3oz/A

DuraCor ® + Remedy ® OR Surmount ®

16 to 20 fluid oz/A + 16 to 32oz/A OR 64oz/A

Apply in summer when leaves are mature and fully expanded.

Bois d’arc

Apply in spring immediately as leaves mature; add 1 lb/A of 2,4-D if later.

Buckbrush

Chaparral

3.3oz/A

GrazonNext HL + Tordon ® 22K OR Surmount

32oz/A + 32oz/A OR 80oz/A

Chinese tallowtree

Apply in the fall prior to or with less than 10% leaf color change.

Apply anytime with good soil moisture.

Cholla cactus Surmount

64oz/A

DuraCor ® + Remedy OR Surmount

16 to 20 fluid oz/A +16oz OR 80 to 96oz/A

Flameleaf sumac

Apply in late spring when leaves are mature.

Broadcast Brush Applications

• Product Per Acre • Time to Treat

Brush Species

• Herbicide

28oz/A OR 48 to 64oz/A

Sendero OR Surmount

Apply in spring when leaves are mature.

Honeylocust

34oz/A + 72oz/A + 13oz/A OR 28oz/A + + 32oz/A

GrazonNext HL + Grazon P+D + Tordon 22K OR

Apply in fall with good soil moisture. Apply with a NIS at 0.25%

Huisache

Sendero ® + Tordon 22K

Apply in spring or fall under good growth conditions and undisturbed plants. Apply in late spring or summer when leaves are mature with dark green foliage. Apply in late spring or summer when leaves are mature with dark green foliage. Apply in late summer or early fall. If heavy brush overstory is present, apply late winter/early spring before bud break.

Chaparral + Tordon 22K

3.3oz/A + 32oz/A

Macartney rose

Mesquite (honey)

Sendero

28oz/A

Mesquite (western honey)

Sendero + Remedy

28oz/A + 8oz/A

MezaVue ® OR Surmount

32oz/A OR 64oz/A

Pricklypear

Tasajillo

MezaVue

32oz/A

Apply anytime with good soil moisture.

Broadcast Applications with Spike ® 20P Herbicide

Spike ® 20P herbicide, a pelleted product, controls more than 100 woody species from the roots up, to provide long-term brush control and grass release.

Notes Spike 20P kills shrubs and trees. Do not use near desirable species. Carefully read the label precautions before using. When the treatment site has more than 10% grass cover, apply Spike 20P during the dormant season to avoid grass injury. Grass stands can be reduced by high rates of Spike 20P, although they will recover as brush competition is eliminated.

Broadcast Applications with Spike ® 20 P Herbicide

Broadcast Application Timing

Plant Species

Recommended Time to Treat

Blackjack and Post Oak, Elm

Dormant Season

Blackbrush, Whitebrush

Dormant Season

Lotebush, Yaupon

Dormant Season

Creosotebrush, Tarbrush

Dormant Season

Sand Shinnery Oak

Dormant Season

Running Liveoak

Dormant Season

Catclaw Acacia, Catclaw Mimosa

Dormant Season

Black Locust

Dormant Season

HERBICIDE RATE

Read the label for recommended rates or contact your Corteva Agriscience ™ representative

Broadcast Equipment Spike ® 20P herbicide pellets may be applied with airplane or helicopter equipment with a positive metering device. You may also apply it with a Solo backpack blower that can cover swaths up to 70 feet. For more details, talk with your Corteva Agriscience representative. You may also use Spike 20P to control individual trees or scattered stands of brush as well. How Spike 20P Works • Pellets adhere to soil and won’t break down under sunlight and heat before water activates them. • Spike 20P is then absorbed by the brush root system and moved up to leaves. • By inhibiting photosynthesis, Spike 20P causes brush to defoliate slowly, turn brown and die, encouraging grasses to grow. • Brush may refoliate and defoliate for up to two years, gradually depleting its food reserves. • Brush is completely dead, roots and all. 16

Mow or Spray Brush

As a rule, mowing brush makes it more difficult to control with foliar herbicides. Mowing tends to increase a plant’s rootstock and decrease foliage. Foliage is the gateway for the herbicide into the plant. With more foliage, more herbicide can be absorbed and translocated to the roots. With less foliage, less herbicide can be absorbed. Because mowing usually creates more rootstock to kill, and a smaller gateway to reach it, you get poorer control after mowing. This is true even when the foliar herbicide is applied several months after mowing, as the table below indicates. If you choose to spray regrowth from brush that’s been mowed or shredded, wait until trees are 3 to 4 feet tall and shrubs or vines are at least 2 feet tall. Notes It’s usually easier to control small, scattered brush than big, dense brush. And individual plant leaf sprays usually are the quickest and cheapest methods of individual plant tre atment.

Effect of Mowing Prior to Spraying with Remedy ® herbicide on Control of Blackberry/Dewberry Complex (Remedy Applied at 32 ounces/A Plus Surfactant)

Number of Months After Mowing That Briars Were Sprayed

Percent Control

Mowing Date

Spraying Date

Not Mowed

August 4

Not Mowed

April 3

August 4, following year

17 months after mowing

June 27

August 4, following year

13 months after mowing

October 16

August 4, following year

9.5 months after mowing

February 3

August 4, same year

6 months after mowing

March 1

August 4, same year

5 months after mowing

April 1

August 4, same year

4 months after mowing

May 2

August 4, same year

3 months after mowing

June 1

August 4, same year

2 months after mowing

July 2

August 4, same year

1 months after mowing

Source: Dr. Bruce Pinkerton, Clemson University

Individual Plant Foliar Application Rates

The following table gives you a list of several choices available to control certain species. The cost and degree of control offered by the different tank mixes will vary, so it’s important to talk with your Corteva Agriscience ™ representative before you decide. Notes Do not apply more than 20 fluid ounces of DuraCor ® herbicide, 1.75 pints of Sendero ® herbicide, 4 pints of Remedy ® herbicide, 96 ounces of Surmount ® herbicide, 4 pints of PastureGard ® HL herbicide, 2 pints of GrazonNext® HL herbicide, or 3.3 ounces of Chaparral ™ herbicide per acre per year. Important Tips 1. Observe and follow all label directions and restrictions. 2. Spray foliage until it glistens, but not to the point of runoff. Coverage is critical. For pricklypear, spray both sides of the pad. 3. To improve spray coverage, use 1 to 2 quarts of an approved agricultural surfactant per 100 gallons of spray mix. 4. Apply herbicides when environmental conditions are as close to optimum as possible. Consult your local Natural Resource Conservation Service office, County Extension Agent or Corteva Agriscience representative for more details concerning proper timing. 5. Make sure the target plant has good foliage. Insects, hail, freezing weather or drought may damage plant foliage, reducing your degree of control.

Individual Plant Foliar Application Rates

Mixing Chart For Individual Plant Foliar Treatments (Examples for Labeled Rate Range of 1 Quart to 1 Gallon/100 Gallons)

Amount of Herbicide Required at Specific Rate

Herbicide Concentration

1/4%

1/2%

3/4%

Total Volume of Spray Mixture

1 Quart/ 100 Gallons

1 Gallon/ 100 Gallons

2 Quarts/Gallons 3 Quarts/Gallons

400 Gallons

1 Gallon

2 Gallons

3 Gallons

4 Gallons

100 Gallons

1 Quart

2 Quarts

3 Quarts

1 Gallon

50 Gallons

16 Ounces

32 Ounces

48 Ounces

64 Ounces

25 Gallons

8 Ounces

24 Ounces

32 Ounces

14 Gallons

4.5 Ounces

9 Ounces

13.5 Ounces

18 Ounces

10 Gallons

3.2 Ounces

6.4 Ounces

9.6 Ounces

12.8 Ounces

5 Gallons

1.6 Ounces

3.2 Ounces

4.8 Fluid Ounces 6.4 Ounces

3 Gallons

1 Ounce

2 Ounces

3 Ounces

4 Ounces

Source: Dr. Bruce Pinkerton, Clemson University

Individual Plant Foliar Application Rates

• Product Per 100 Gallons • Time to Treat

Brush Species

• Herbicide

Apply in spring when leaves are fully expanded.

Baccharis (willow) Surmount ®

1 gallon

DuraCor ® + PastureGard ® HL OR Chaparral ™

64 fluid oz/A + 1 gallon OR 6.6oz 64 fluid oz/A + 1 gallon OR 1 gallon

Apply to mature leaves, before flowers or after fruit drop.

Blackberry

DuraCor ® + Remedy ® OR Surmount

Apply in fall, with good moisture conditions.

Bois d’arc

Apply in spring, immediately when leaves mature. Optimum treatment time is April to July.

Buckbrush

Chaparral

6.6oz

Burrobrush

Surmount

2 gallons

GrazonNext ® HL OR Surmount

96oz OR 1 to 2 gallons

Chinese tallowtree

Apply in spring or fall.

Apply in late summer through fall with adequate soil moisture.

Cholla cactus

Surmount

1 gallon

Christ thorn

Remedy

1 gallon

Apply in early summer.

Apply in spring when leaves are fully mature. Optimum treatment time is October to April. Optimum treatment time is October to April. Apply in late spring with mature leaves.

Common persimmon

Surmount

2 gallons

Elm

Surmount ®

2 gallons

Elm (winged or cedar)

Surmount

2 gallons

Flameleaf sumac

Surmount

1 to 2 gallons

Chaparral OR GrazonNext ® HL OR Sendero ® Sendero ® OR GrazonNext HL OR Surmount

6.6oz OR 96oz OR 1 gallon

Apply in spring when leaves are fully mature.

Honeylocust

1 gallon OR 96oz OR 1 to 2 gallons

Apply in fall with good moisture conditions.

Huisache

Individual Plant Foliar Application Rates

Brush Species

• Herbicide • Product Per 100 Gallons • Time to Treat

Apply spot spray late winter through summer.

Juniper (ashe or redberry)

Surmount

2 gallons

Chaparral ™ OR GrazonNext HL OR Surmount

6.6oz OR 96oz OR 2 gallons

Apply in spring or fall with good moisture conditions, undisturbed.

Macartney rose

Apply in late spring or summer when leaves are mature with dark green foliage.

Mesquite

Sendero

1 gallon

Spray in late spring or fall with mature foliage.

Old Man’s Beard

MezaVue ®

1 gallon

Apply anytime with good moisture and growing conditions.

Pricklypear, Tasajillo MezaVue ®

1 gallon

South Texas Mixed Brush

Sendero + Surmount

1 gallon + 1 gallon

Apply at full leaf.

Individual Plant Basal Bark Applications Two big advantages of stem sprays: little chance of drift, and effective any time of year. Stem sprays can be done as you have time, throughout the year. That helps you stay ahead of brush encroachment. Use a solution of 25% Remedy ® herbicide in basal oil or diesel fuel. Method 1: Low-Volume Basal Bark Definition: Apply the herbicide solution to the entire circumference of the lower 12 to 15 inches of the target stem. Continue application until the bark is thoroughly wet, but not until the point of runoff. Use: Control woody plants with smooth stems less than 6 inches in diameter. Effective year-round. Method 2: Basal Cut-Stump Definition: Spray the herbicide solution on the freshly cut surfaces of stumps. It’s important to spray the entire exposed stump, particularly the cambium layer next to the bark of the cut surface. Use: Stump treatments help provide control of the tree root system, especially suckering species. This control helps prevent sprouting and troublesome regrowth. You can make stump treatments at any time of the year.

• Treatment Timing Any time — optimum timing for stem sprays is in the growing season when the plant has mature leaves. Spring treatment works best. Brush Species Controlled Bacharras (Willow) Blackbrush Bois D’arc Catclaw Acacia Catclaw Mimosa Chinese Tallowtree Christ Thorn Common Persimmon Elm Elm (Winged or Cedar) Greenbriar Hackberry Honeylocust Huisache Lotebush Mesquite (Honey) Mesquite (Western Honey) Retama Russian Olive Saltcedar Texas Persimmon Willow Yaupon 22

Individual Plant Basal Bark Applications

Mixing Directions for 25% Herbicide Solutions

25% Herbicide Mix

Total Volume (tank size)

Basal Oil or Diesel Fuel

Remedy ®

1 Gallon

1 Quart

3 Quarts

3 Gallons

3 Quarts

9 Quarts

4 Gallons

1 Gallon

3 Gallons

5 Gallons

1.25 Gallons

3.75 Gallons

Stem-Spray (Basal Bark) Application Rates

Treatment

Herbicide Mix

Low-Volume 25% Remedy ® herbicide + 75% basal oil or diesel fuel

Cut-Stump

25% Remedy OR PastureGard ® HL + 75% basal oil or diesel fuel

Individual Plant Whorl Sprays for Yucca and Palmetto Species • Herbicide • Mix

• Recommended Time to Treat

Growing season. Using an adjustable cone nozzle (x1), spray a 2-second burst into the center of each individual whorl. Each yucca plant may have multiple whorls. Growing season. Using an exact delivery handgun applicator, apply 2 ml. to 4 ml. of undiluted Remedy directly into the center of each plant whorl. Anytime. Spray the center of each individual whorl of leaves to the point of runoff. Complete coverage of leaves is not necessary. The crown of each plant must be thoroughly wet with the herbicide mixture. Anytime. Spray the center of each individual whorl of leaves to the point of runoff. Complete coverage of leaves is not necessary. The crown of each plant must be thoroughly wet with the herbicide mixture.

15% Remedy + 85% basal oil or diesel fuel. See mixing directions on next page.

Yucca

Remedy ® Herbicide

Yucca

Remedy

Undiluted

2% Remedy herbicide in basal oil or diesel fuel. See mixing chart on next page.

Yucca

Remedy

25% Remedy in basal oil or diesel fuel. See mixing directions next page.

Palmetto

Remedy

Mixing Directions For Yucca Spray With 15% Remedy ® Herbicide in Oil 15% Herbicide Mix

Total Volume (tank size)

Remedy

Basal Oil or Diesel Fuel

1 Gallon

19 Fluid Ounces

109 Fluid Ounces

3 Gallons 4 Gallons

58 Fluid Ounces

2.5 Gallons 3.4 Gallons

77 Fluid Ounces

5 Gallons

3 Quarts

4.25 Gallons

Palmetto

Mixing Directions For Yucca Spray With 2% Remedy ® Herbicide in Oil 2% Herbicide Mix

Total Volume (tank size)

Remedy

Basal Oil or Diesel Fuel

1 Gallon 3 Gallons 4 Gallons 5 Gallons

2.67 Fluid Ounces 8 Fluid Ounces 10.5 Fluid Ounces 13 Fluid Ounces

125 Fluid Ounces

23.5 Pints 31.3 Pints

39 Pints

Yucca

Mixing Directions For Yucca Spray With 25% Remedy ® Herbicide in Oil 25% Herbicide Mix Total Volume (tank size) Remedy

Basal Oil or Diesel Fuel

1 Gallon 3 Gallons 4 Gallons 5 Gallons

1 Quart

3 Quarts 9 Quarts 3 Gallons

3 Quarts 1 Gallon

1.25 Gallons

3.75 Gallons

Honeylocust

Soil-Applied Spot Applications with Tordon ® 22K Herbicide

For Best Results, Follow These Five Simple Steps: 1. Place the herbicide properly. This is the most important factor in spot application. For eastern red cedar, juniper (ashe or one-seed), common persimmon, honeylocust and bois d’arc: Place Tordon ® 22K directly on the soil beneath the plant — between the trunk and the edge of the dripline. If the plant is growing on a slope, place the herbicide on the tree’s upslope side. Apply the spots of liquid in a ring around the plant. Uniform distribution will help ensure more consistent control. If plant size requires more than a single 4 mL application, space subsequent applications equally around the plant. For juniper (redberry): Apply Tordon 22K to the stem base at or near the dripline. 2. Apply before rainfall and plant growth. Rainfall carries Tordon 22K down to the plant roots. When the plant uses water from the soil, the herbicide moves into the plant with the water. 3. Avoid applying in heavy clay soils. Soil characteristics may affect results. Heavy soils such as clays and clay loams — or soils with very high organic matter — may tie up Tordon 22K, preventing it from reaching the plant. The herbicide won’t be as effective, so you may want to use a different control measure in these cases. 4. Keep away from desirable species. When working in and around areas where damage to desirable species cannot be tolerated, you should choose another method of control. Using a soil-applied herbicide may result in damage or even death to desirable plants because the roots of these plants will pick up the herbicide. Notes Eastern red cedar, juniper (ashe, redberry or one-seed), common persimmon, honeylocust and bois d’arc can be controlled with soil applications of Tordon 22K herbicide. Using a spot gun, you deliver a predetermined dose of undiluted herbicide directly to the soil surface, or for juniper (ashe or redberry), to the stem base at or near the dripline. For videos demonstrating these techniques, please visit our website, RangeAndPasture.com.

UltiGraz SM Pasture Weed & Feed One Pass, Better Grass SM .

How UltiGraz SM Pasture Weed & Feed Works UltiGraz SM allows you to fertilize your grass not your weeds—Conveniently. Herbicide in a concentrated solution is sprayed on dry fertilizer granules during the blending process. The combined dry fertilizer and herbicide are applied through spreader trucks or fertilizer buggies similarly to how dry fertilizer alone would be applied. From there, rainfall moves the herbicide-fertilizer solution into the soil. Weed control is almost entirely dependent on the soil residual activity of the herbicide and root uptake of the weeds. UltiGraz offers control of select broadleaf pasture weeds. Depending on application timing and weed species, weed control from UltiGraz Pasture Weed & Feed may vary from that of foliar applications.

• Apply through Spreader Trucks or Fertilizer Buggies • Self-Apply on Your Schedule if • Custom Applicationis not Available • Fits Large and Small Operations • Calibration Determined by Fertilizer Application

Benefits • Save Time and Extra Application Cost—It’s One Trip • Fewer Weather Delays • Reduced Risk of Off-Target Movement • No Spray Equipment Needed

This Southwestern Rancher’s Guide to Weed & Brush Management is provided for reference purposes only and is not a substitute for the product label or MSDS. Federal law requires that all pesticide products be used in accordance with the label attached to the product container. The information and any recommendations set forth herein (“Information”) are presented in good faith; however, Corteva Agriscience ™ makes no representations as to the completeness or accuracy thereof. Information is supplied upon the conditions that the person receiving same will make their own determinations as to its suitability for their purposes prior to use and consult with their county Extension agent or a Corteva Agriscience sales representative to ensure compliance with all federal, state, and local regulations. In no event will Corteva Agriscience be responsible for damages of any nature whatsoever resulting from the use of or reliance upon such Information. NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESSED OR IMPLIED, OR MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR FREEDOM FROM ANY PATENT OWNED BY CORTEVA AGRISCIENCE OR BY OTHERS TO BE INFERRED, OR OF ANY OTHER NATURE ARE MADE HEREUNDER WITH RESPECT TO THE INFORMATION OR THE PRODUCTS TO WHICH THE INFORMATION REFERS. Inasmuch as any assistance furnished by Corteva Agriscience ™ with reference to the proper use and disposal of its products is provided without charge, Corteva Agriscience assumes no obligation or liability, therefore. Not all products are labeled or available in all states or areas. Contact your Corteva Agriscience representative, dealer or applicator for alternative recommendations.

Advanced Brush Management System

A whole new way to see the potential of your land. You know your land, but you’ve never known it like this. Introducing LandVisor ® advanced brush management.Get a comprehensive view of your land, revealing actionable insights to make the right decisions at the right time.LandVisor combines sophisticated imagery, data, technology and expert guidance to give you confidence in your land management decisions. LandVisor ® advanced brush management isn’t just tech — it’s a total solution. Make informed decisions about land management, including precision control of your mesquite and exactly when to treat problem vegetation. Advanced Data and Image Technology Advanced imagery with GIS technology and field data collection provide detailed information on forage productivityand vegetation, including density of desirable and undesirable plant species. Industry Expertise A Certified LandVisor Consultant partners with a Certified LandVisor Applicator and Corteva Range & Pasture Specialistto ensure proper timing and best-in-class herbicide treatments for your land. Actionable Insights Learn precisely where and when to spray your mesquite to unlock forage productivity and plant diversity on your land, maximizing your return on investment. Request a Demo Interested in learning more about LandVisor advanced brush management? Visit landvisor.corteva.us to request a live demo with a Certified LandVisor Consultant.

@ CortevaPastures @ CortevaPastures @ CortevaPastures

To find your local Corteva Range and Pasture Specialist visit rangeandpasture.com/specialist

Visit us at rangeandpasture.com TM ® Trademarks of Corteva Agriscience and its affiliated companies. Surmount ® ,Tordon ® 22K and GrazonPD3 ™ are federally Restricted Use Pesticides. Spike ® is a registered trademark of Nutrichem used under license.

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. This Weed Identification Guide is provided for reference purposes only and is not a substitute for the product label or MSDS. Federal law requires that all pesticide products be used in accordance with the label attached to the product container. The information contained in this Weed Identification Guide is presented in good faith, and Corteva Agriscience™ assumes no liability for the information and makes no expressed or implied representations or warranties. Under normal field conditions DuraCor ® is non-volatile. DuraCor, GrazonNext ® HL, Milestone ® and Chaparral ™ herbicides 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 DuraCor, GrazonNext HL and Chaparral to manure and urine from animals that have consumed treated forage. Consult the label for full details. GrazonNext HL is not for sale, distribution, or use in New York State and San Luis Valley of Colorado. Some states require an individual be licensed if involved in the recommendation, handling or application of any pesticide. Consult your local Extension Office for information regarding licensing requirements. Not all products listed in this guide 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. State restrictions on the sale and use of Remedy Ultra apply. Consult the label before purchase or use for full details. GrazonPD3 ™ is not for sale, distribution or use in Nassau and Suffolk Counties in New York State. Sendero ® herbicide is covered by U.S. Patent No. 10,412,964 and other pending U.S. patent applications, international patents, and pending international patent applications. Always read and follow label directions. ©2025 Corteva. CR01-000-093 COR (04/25)

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