Duracor is a selective, post-emergent herbicide made to control tough broadleaf weeds and woody plants without harming desirable grasses.
It is designed for use in pastures, rangelands, and other non-crop areas.
Because it works after weeds have emerged, it’s ideal for cleaning up unwanted plants that are already growing.
Duracor targets the problem weeds while leaving grasses healthy and strong. It also stays active in the soil, helping to prevent new weeds from growing for a long time.
Easy to mix and apply, Duracor helps reduce the number of treatments needed, saving both time and effort.
Contents
Active Ingredient
Duracor herbicide contains two active ingredients: aminopyralid potassium salt and florpyrauxifen-benzyl.
Both belong to Group 4 herbicides, which are part of the synthetic auxin family. This means they act like natural plant hormones and make weeds grow in a strange and uncontrolled way until they die. These ingredients are selective, so they target broadleaf weeds and woody plants while leaving grasses mostly safe.
Florpyrauxifen-benzyl is known for its low use rates, meaning you only need a small amount to get strong results. It also has long residual control, which means it keeps working in the soil to stop new weeds from growing for a longer time.
The label shows that each gallon of herbicide contains 0.667 pounds (about 302.6 grams) of aminopyralid and 0.067 pounds (about 30.4 grams) of florpyrauxifen-benzyl. This helps you know how much product to use when mixing.
How Does It Work
This herbicide works by disrupting the normal growth of broadleaf weeds and woody plants.
It contains synthetic auxins, which mimic natural plant hormones. When the plant absorbs the herbicide through its leaves or stems, the chemical sends confusing growth signals.
It causes twisting, cupping, and swelling of the stems and leaves while also affecting the plant’s ability to move nutrients and water properly.
You may start to see leaf curling, stem bending, and wilting within 1 to 3 days after spraying, depending on the weather and plant type. These symptoms show that the herbicide is working.
Most weeds die completely within 1 to 3 weeks, with faster results in warm, sunny weather.
Where Duracor Can Be Used and State Restrictions
The product can be used on many types of land, such as rangeland, permanent grass pastures (with grasses grown for hay), and Conservation Reserve Program (CRP) land. It is also approved for wildlife areas, including places like dry floodplains, deltas, marshes, prairie potholes, and vernal pools that hold water only part of the year.
| Alabama | Arizona |
| Arkansas | Colorado |
| Florida | Georgia |
| Hawaii | Idaho |
| Illinois | Indiana |
| Iowa | Kansas |
| Kentucky | Louisiana |
| Michigan | Minnesota |
| Mississippi | Missouri |
| Montana | Nebraska |
| Nevada | New Mexico |
| North Carolina | North Dakota |
| Ohio | Oklahoma |
| Oregon | Pennsylvania |
| South Carolina | South Dakota |
| Tennessee | Texas |
| Utah | Virginia |
| Washington | West Virginia |
| Wisconsin | Wyoming |
However, its use is restricted in certain U.S. states. Specifically, Duracor is not registered for sale or use in New York. Additionally, it is not approved for use on pastures in the following states: Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont. In these states, other labeled uses are permitted, including grazed areas in and around these sites.
For the most accurate and current details about where Duracor can be used and any restrictions in your state, check the product label or contact your local pesticide regulatory agency.
List of Controlled Weeds
This herbicide is designed to control a wide range of broadleaf weeds and certain woody plants in pastures and rangeland. It effectively manages over 140 weed species, including both annual and perennial types.
| Common Name | Scientific Name | Life Cycle | Plant Family |
|---|---|---|---|
| actinomeris, wingstem | Verbesina alternifolia | perennial | Asteraceae |
| amaranth, spiny | Amaranthus spinosus | annual | Amaranthaceae |
| amaranth, palmer | Amaranthus palmeri | annual | Amaranthaceae |
| bedstraw | Galium spp. | perennial | Rubiaceae |
| beggarticks | Bidens spp. | annual | Asteraceae |
| broomweed, annual | Amphiachyris dracunculoides | annual | Asteraceae |
| burdock, common | Arctium minus | biennial | Asteraceae |
| buttercup, hairy | Ranunculus sardous | perennial | Ranunculaceae |
| buttercup, tall | Ranunculus acris | perennial | Ranunculaceae |
| chamomile, scentless | Matricaria inodora | annual | Asteraceae |
| caraway | Carum carvi | biennial | Apiaceae |
| carrot, wild | Daucus carota | biennial | Apiaceae |
| cinquefoil, hoary | Potentilla argentea | perennial | Rosaceae |
| cinquefoil, sulfur | Potentilla recta | perennial | Rosaceae |
| chicory | Cichorium intybus | perennial | Asteraceae |
| chickweed, common | Stellaria media | annual | Caryophyllaceae |
| clover, sweet | Melilotus officinalis | biennial | Fabaceae |
| clover, white | Trifolium repens | perennial | Fabaceae |
| cocklebur | Xanthium strumarium | annual | Asteraceae |
| croton, woolly | Croton capitatus | annual | Euphorbiaceae |
| croton, Texas | Croton texensis | annual | Euphorbiaceae |
| croton, tropic | Croton glandulosus | annual | Euphorbiaceae |
| crownvetch | Securigera varia | perennial | Fabaceae |
| cudweed, purple | Gnaphalium purpureum | annual | Asteraceae |
| daisy, oxeye | Leucanthemum vulgare | perennial | Asteraceae |
| dandelion, common | Taraxacum officinale | perennial | Asteraceae |
| dock, broadleaf | Rumex obtusifolius | perennial | Polygonaceae |
| dock, curly | Rumex crispus | perennial | Polygonaceae |
| evening primrose, cutleaf | Oenothera laciniata | annual | Asteraceae |
| falsedandelion, Carolina | Pyrrhopappus carolinianus | annual/biennial | Asteraceae |
| fiddleneck, common | Amsinckia intermedia | annual | Boraginaceae |
| fleabane, annual | Erigeron annus | annual | Asteraceae |
| fleabane, hairy | Conyza bonariensis | annual | Asteraceae |
| gumweed, curlycup | Grindelia squarrosa | biennial | Asteraceae |
| hawkweed, orange | Hieracium aurantiacum | perennial | Asteraceae |
| hawkweed, yellow | Hieracium pratense | perennial | Asteraceae |
| hemlock, poison | Conium maculatum | biennial | Apiaceae |
| henbit | Lamium amplexicaule | annual/biennial | Lamiaceae |
| horsenettle, Carolina | Solanum carolinense | perennial | Solanaceae |
| horsenettle, western | Solanum dimidiatum | perennial | Solanaceae |
| horseweed | Conyza canadensis | annual | Asteraceae |
| ironweed, tall | Vernonia gigantea | perennial | Asteraceae |
| ironweed, western | Vernonia baldwinii | perennial | Asteraceae |
| thistle, woolly distaff | Carthamus lanatus | annual | Asteraceae |
| tickclover | Onopordum acanthium | biennial | Asteraceae |
| vervain, blue | Verbena hastata | perennial | Asteraceae |
| vervain, hoary | Verbena stricta | perennial | Asteraceae |
| vetch, common | Vicia sativa | annual | Fabaceae |
| Common Name | Scientific Name | Life Cycle | Plant Family |
|---|---|---|---|
| beebalm, pony (horse mint) | Monarda pectinata | annual | Lamiaceae |
| blackbrush | Acacia rigidula | perennial | Fabaceae |
| buffalo bur | Solanum rostratum | annual | Solanaceae |
| bullnettle, Texas | Cnidoscolus texanus | perennial | Euphorbiaceae |
| camelthorn | Alhagi pseudalhagi | perennial | Fabaceae |
| cat’s ear | Hypochaeris spp | perennial | Asteraceae |
| camphorweed | Heterotheca subaxillaris | annual | Asteraceae |
| coneflower, upright prairie | Ratibida columnifera | perennial | Asteraceae |
| fireweed | Epilobium angustifolium | perennial | Onagraceae |
| geranium, Carolina | Geranium carolinianum | annual | Geraniaceae |
| henbane, black | Hyoscyamus niger | annual/biennial | Solanaceae |
| hogweed, giant | Heracleum mantegazzianum | perennial | Apiaceae |
| horehound | Marrubium vulgare L. | perennial | Lamiaceae |
| indigo, blue | Baptisia australies | perennial | Fabaceae |
| kudzu | Pueraria montana | perennial | Fabaceae |
| lespedeza, annual | Lespedeza striata | annual | Fabaceae |
| loosestrife, purple | Lythrum salicaria | perennial | Lythraceae |
| licorice, wild | Glycyrrhiza lepidota | perennial | Fabaceae |
| marijuana | Cannabis sativa | annual | Cannabaceae |
| mayweed, stinking | Anthemis cotula | annual | Asteraceae |
| medic, black | Medicago lupulina | perennial | Fabaceae |
| Mexican-tea | Dysphania ambrosioides | annual/perennial | Chenopodiaceae |
| mimosa | Albizia julibrissin | biennial | Scrophulariaceae |
| mugwort | Artmeisia vulgaris | perennial | Asteraceae |
| mullein | Verbascum spp. | biennial | Scrophulariaceae |
| oxtongue, bristly | Picris echioides | biennial | Asteraceae |
| partridgepea | Chamaecrista fasciculata | annual | Fabaceae |
| pea, swainson | Sphaerophysa salsula | perennial | Fabaceae |
| pokeweed, common | Phytolacca americana | perennial | Phytolaccaceae |
| povertyweed | Iva axillaris | perennial | Asteraceae |
| pricklyash, lime | Zanthoxylum fagara | perennial | Fabaceae |
| puncturevine | Tribulus terrestris | annual | Zygophyllaceae |
| redbud | Cercis Canadensis | woody perennial | Fabaceae |
| ragweed, false | Parthenium hysterophorus | annual | Asteraceae |
| ragwort, tansy | Senecio jacobaea | perennial | Asteraceae |
| rush skeletonweed | Chondrilla juncea | perennial | Asteraceae |
| trefoil, birdsfoot | Lotus corniculatus | perennial | Fabaceae |
| sida, prickly | Sida spinosa | annual | Malvaceae |
| sowthistle, annual | Sonchus oleraceae | annual | Asteraceae |
| sowthistle, perennial | Sonchus arvensis | perennial | Asteraceae |
| sowthistle, prickly | Sonchus asper | annual | Asteraceae |
| St. Johnswort, common | Hypericum perforatum | perennial | Clusiaceae |
| thistle, Canada | Cirsium arvense | perennial | Asteraceae |
| thistle, Italian | Carduus pycnocephalus | annual | Asteraceae |
| thistle, Scotch | Onopordum acanthium | biennial | Asteraceae |
| soda apple, tropical | Solanum viarum | perennial | Solanaceae |
| wisteria | Wisteria brachybotris | woody perennial | Fabaceae |
| wormwood, absinth | Artemisia absinthium | perennial | Asteraceae |
| yarrow, common | Achillea millefolium | perennial | Asteraceae |
| Target Pest | Rate | Directions |
|---|---|---|
| absinth wormwood (Artemisia absinthium) |
20 fl oz/acre DuraCor (1.46 L/ha) |
Spray before the plant grows taller than 30 cm. On CRP land, mow or burn old plants first and spray with at least 3 gallons per acre (28 L/ha). |
| annual marshelder – early | 12 fl oz/acre DuraCor (0.88 L/ha) |
Spray when plants are about 15 cm tall. |
| annual marshelder – mature | 20 fl oz/acre DuraCor + 1% MSO (1.46 L/ha) |
Spray when plants are taller than 15 cm. |
| blackberry spp. (Rubus sp.) |
16 fl oz/acre DuraCor + 16 fl oz/acre PastureGard HL (1.17 L/ha + 1.17 L/ha) |
Spray after fruit has dropped in late summer. |
| black locust, Chinese tallow, hedge, honeylocust, multiflora rose, sumac, tree of heaven | 12–16 fl oz/acre DuraCor + 16–32 fl oz/acre Remedy Ultra (0.88–1.17 L/ha + 1.17–2.34 L/ha) |
Spray from late spring to late summer after trees have full leaves. For multiflora rose, spray in early fall if leaves are green. Wait 9–12 months after mowing before spraying. |
| buckbrush (Symphoriocarpus orbiculatus) |
12 fl oz/acre DuraCor + 16–32 fl oz/acre 2,4-D (0.88 L/ha + 1.17–2.34 L/ha) |
Spray after leaves have fully opened. If spraying late in spring, use 32 fl oz (2.34 L/ha) of 2,4-D. |
| goldenrod spp. (Solidago sp.) |
Same as above | Spray when plants are at least 30 cm tall. |
| Canada thistle (Cirsium arvense) |
16–20 fl oz/acre DuraCor (1.17–1.46 L/ha) |
Best to spray after first flower buds appear in late spring. You can also spray in fall before the first hard frost. |
Application Rate
The herbicide has a low and flexible application rate, making it easy to adjust based on your needs.
The product is typically applied at 12 to 20 fluid ounces per acre (about 0.88 to 1.46 liters per hectare), depending on the type and size of the weeds. In most cases, the common rate is 16 fluid ounces per acre (approximately 1.17 liters per hectare), which provides effective control for a wide range of broadleaf weeds and woody plants.
To apply Duracor properly, mix the amount shown in the table with 0.5 to 2.5 gallons of water (1.9 to 9.5 liters), depending on how much spray you need to cover 1,000 square feet (about 93 square meters).
Using 0.5 gallons (1.9 liters) for that area equals 22 gallons per acre (205 liters per hectare), while using 2.5 gallons equals 109 gallons per acre (1,020 liters per hectare).
This helps make sure the herbicide spreads evenly, whether you’re using a light or heavy spray.
| Broadcast Rate (fl oz/acre) |
Duracor per 1000 sq ft (fl oz) |
Duracor per 1000 sq ft (mL) |
|---|---|---|
| 12 | 0.28 | 8 |
| 16 | 0.37 | 11 |
| 20 | 0.46 | 14 |
Note: 1 mL = 1 cc and 1 fluid ounce (fl oz) = 29.6 mL = 2 tablespoons = 6 teaspoons.
To figure out how much Duracor you need for an area bigger than 1,000 square feet, just multiply the amount shown in the table by how many “thousands” of square feet your area has. For example, if your area is 3,500 square feet, divide that by 1,000 to get 3.5. Then multiply the table value by 3.5 to get the right amount of product to use.
How You Can Apply Duracor Herbicide
You can apply this product in four main ways: ground broadcast, aerial broadcast, high-volume foliar, and low-volume foliar.
There’s also a spot treatment method for smaller areas. Each method depends on the size of the area, the height and thickness of the plants, and the type of spray equipment you use.
Duracor should always be sprayed as a coarse or low-pressure spray, not a fine mist. Very fine sprays can reduce how well the product works and can drift into unwanted areas.
You need to use enough water to cover the weeds evenly. If the plants are tall or thick, you should increase the spray volume to make sure all leaves and stems are covered.
In ground applications, using more than 10 gallons per acre (about 94 liters per hectare) gives better results, especially in dense growth. In aerial spraying, use at least 2 gallons per acre (about 19 liters per hectare), but 5 gallons or more (about 47 liters per hectare) is better for full coverage.
For high-volume foliar spraying, you can apply up to 20 fluid ounces per acre (about 1.46 liters per hectare) during a growing season. Make sure to fully wet the plant leaves and stems.
In low-volume foliar spraying, you use less water but still need to cover the whole plant. Spray nozzles and equipment should match the height and thickness of the plants. For thick brush, you may need nozzles that spray up to 2 gallons per minute (about 7.6 liters per minute) at 40–60 psi (about 2.8–4.1 bar). For smaller brush, backpack sprayers or smaller nozzles that spray less than 1 gallon per minute (about 3.8 liters per minute) may work better.
In spot treatments, you treat only certain areas instead of the whole field. You can apply up to 40 fluid ounces per acre (about 2.92 liters per hectare) on no more than half the field.
How to Mix It
Before you start mixing, make sure you are wearing the right protective equipment (PPE). You should have on a long-sleeved shirt, long pants, chemical-resistant gloves, protective eyewear, and shoes with socks.
If you’re handling the concentrate or cleaning up spills, you should also wear a chemical-resistant apron.
Once you’re equipped, gather all your materials, including the herbicide, any other products you’ll be mixing, and clean water.
To mix Duracor with water, start by filling your spray tank with half the needed water. Keep the water moving.
First, add any dry products and mix until they fully dissolve. Then, add the correct amount of Duracor, along with any other liquid herbicides you’re using (like CS, SC, SE, or OD types).
After that, add any surfactants, drift control agents, or other additives. Finally, pour in the rest of the water, keeping everything well mixed until you’re ready to spray.
Mixing with Other Herbicides (Tank Mixes)
It can be mixed with other herbicides to control more weed types or get better results. But never mix it with another product unless you’ve checked the approved list.
When tank mixing, always:
- Use only products that are approved for the same crop or land area.
- Never go over the maximum application rates.
- Follow the strictest rules from all product labels in the mix.
- Keep the spray tank agitated the whole time.
- Use a jar test to make sure everything mixes well together.
- If a product is in water-soluble packaging, do not mix it with anything that contains boron, unless your tank has been properly cleaned.
How to Do a Jar Test
Before mixing everything in the big tank, try a jar test. Use a clear glass jar with a lid. Add the products in the same order and amounts you’ll use in the real tank. Shake the jar gently.
If the mix stays smooth for 30 minutes or mixes easily again after resting, it’s compatible. If you see clumps, layers, or oily film, the products are not compatible. You may need to add a compatibility agent to help them mix.
When to Add Surfactants or Adjuvants
In tough conditions like high heat, dry weather, or dusty leaves, or when weeds are large or hairy, adding a methylated seed oil (1%) or non-ionic surfactant (0.25–0.5%) can help Duracor work better.
Mixing with Liquid Fertilizers
Duracor usually works well with liquid fertilizers. But to be safe, always do a jar test first, especially if you’re using a new fertilizer, changing your water source, or mixing new ingredients.
Fertilizers with N-P or N-P-K can be harder to mix than straight nitrogen, so never skip the test.
If the fertilizer is cold, mixing might be more difficult. If needed, use a compatibility agent to help get a smooth mix.
Make sure the tank is well stirred, and spray the mix the same day you make it, keeping it agitated the whole time. After spraying, rinse the tank well.
How to Apply It
Before you use DuraCor herbicide, it’s important to follow the correct steps to make sure it works well and keeps people, animals, and the environment safe. This includes checking the weather, wearing the right protective gear, mixing the product properly, and cleaning your tools after use.
Always read the product label before starting, and use only the amount recommended.
Here’s a simple step-by-step guide to help you apply DuraCor the right way.
First, check the weather and make sure it is not too windy. The wind should be under 10 mph (about 16 km/h). Also, you should not spray if it is going to rain in the next few hours. Try to choose a warm and sunny day for better results.
After choosing the right day, wear the proper protective gear (PPE). You should wear a long-sleeved shirt, long pants, chemical-resistant gloves, protective eyewear, closed shoes, and socks. If you’re mixing the product, also wear a chemical-resistant apron.
Next, gather everything you need around you. You’ll need the herbicide, measuring tools, clean water, a sprayer, and a clean mixing area.
The next step is mixing the herbicide. Fill the spray tank halfway with water, start agitation, and add the products in the correct order.
Make sure to prepare only the amount you need—no more.
Now you are ready to spray. Apply the herbicide evenly across the entire area. The weeds should be well covered by the spray.
Once you finish spraying, clean all parts of your sprayer using water and detergent or ammonia, following the label directions. Don’t leave any leftover herbicide in the tank.
Finally, follow the post-application rules. Keep people and animals out of the treated area for at least 48 hours, and always follow any other instructions on the product label.
Restrictions
Pasture and Rangeland
If you’re using DuraCor on grassland, here are some things you must follow:
- Don’t use hay from grass sprayed with DuraCor in the last 18 months.
- Don’t move hay or silage from treated land off the farm unless the label says it’s okay.
- Don’t use hay or manure from treated grass in compost.
General Use Rules
- Don’t change this product into another form or repackage it.
- Don’t spray on frozen ground if it might flow into places with sensitive plants.
- Use at least 2 gallons of spray mix per acre.
- You can spray only two times per year, with at least 30 days between them.
- If you’re going to cut grass for hay, worker safety rules apply.
- Don’t spray it on lawns, tur, sport fields, golf courses, tennis courts, sod farms, or other well-kept grass areas.
- If animals eat sprayed hay or grass, wait 3 days before moving them to areas where crops like vegetables or flowers grow. Their manure or urine might harm these plants.
- Don’t use manure from these animals in compost or mulch for broadleaf crops.
- Be careful not to let the spray drift onto plants like tomatoes, flowers, or grapes. Even small amounts can hurt sensitive plants.
- Don’t let the product get into water used for irrigation or drinking.
- Never spray inside irrigation ditches or water channels.
EPA Registration Number
The EPA registration number for Duracor herbicide is 62719-739.
