Chaparral Herbicide

A 1.25 lb dry herbicide concentrate for labeled pasture, rangeland and CRP broadleaf weed control.

For difficult weeds in grassland

Chaparral is a selective herbicide for labeled pasture, rangeland and Conservation Reserve Program sites. Corteva describes its role as controlling broadleaf weeds and brush while preserving desirable grasses when used as directed. The factsheet highlights difficult targets such as buckbrush, blackberry and sericea lespedeza. Those examples make it relevant to forage managers facing weeds that are hard to control with routine mowing or grazing alone.

Two active ingredients, one dry formulation

The 1.25-pound package contains a dry formulation with aminopyralid and metsulfuron-methyl. The ingredients provide complementary broadleaf control and residual activity in the labeled use program. It is mixed with water for spray application, so it suits an operator who can measure and prepare a batch for the field. This differs from a liquid pasture herbicide and from a ready-to-use home-garden product.

Protect the grass stand while targeting weeds

Chaparral is selected for grassland where unwanted broadleaf plants are reducing forage or taking over a pasture. A manager should identify the weed species and decide whether the treatment fits the forage plan, since some desirable broadleaf plants are also sensitive. The label includes specific rates, timing and restrictions by target. One application pattern should not be transferred to a different weed or site.

Residual activity has practical consequences

Corteva describes residual control as part of Chaparral’s role. That can help where later weed emergence is a concern, but aminopyralid’s persistence also matters when treated plant material is moved into hay, manure or compost systems. The label gives handling restrictions for those materials. A buyer managing a pasture should weigh weed-control needs alongside where forage and manure will go after treatment.

Brush and herbaceous weeds need different timing

Blackberry is a woody target, while sericea lespedeza and many other listed pasture weeds present different growth habits. The Corteva factsheet identifies these as treatment opportunities, but the label supplies their individual timing and rate context. The aim is to reduce unwanted competition in a usable grass stand. That is different from maintaining bare ground, and it explains why the desirable forage species are part of the purchase decision.

Two herbicide groups in one treatment

Aminopyralid and metsulfuron-methyl are classified in Groups 4 and 2 respectively. The combination brings two modes of action to the listed broadleaf targets rather than adding a grass-killing ingredient. That distinction can matter where the manager wants grass cover to remain. It also explains why the product is a poor choice for a mixed planting in which sensitive broadleaf crops or ornamentals are desirable. Its defined role is managed non-residential grassland, with target-specific treatment instructions.

Directions for use

Directions for Use It is a violation of Federal law to use this product in a manner inconsistent with its labeling. Read all Directions for Use carefully before applying. Do not apply this product in a way that will contact workers or other persons, either directly or through drift. Only protected handlers may be in the area during application. For any requirements specific to your State or Tribe, consult the agency responsible for pesticide regulation. Not For Sale, Distribution, or Use in New York State. Not for use on pastures in Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont. All other labeled uses are permitted in these states including grazed areas in and around approved use sites.

Complete product label with site-specific directions, rates, application tables and restrictions: https://www3.epa.gov/pesticides/chem_search/ppls/062719-00597-20240927.pdf

Cautions

KEEP OUT OF REACH OF CHILDREN

Precautionary Statements Hazards to Humans and Domestic Animals WARNING Causes Substantial but Temporary Eye Injury • Harmful if Swallowed Do not get in eyes or on clothing. Avoid contact with skin. Personal Protective Equipment (PPE) Applicators and other handlers must wear: x Long-sleeved shirt and long pants x Shoes plus socks x Chemical-resistant gloves made of barrier laminate or Viton ≥14 mils x Protective eyewear Follow manufacturer's instructions for cleaning/maintaining PPE. If no such instructions exist for washables, use detergent and hot water. Keep and wash PPE separately from other laundry. User Safety Recommendations Users should: x Wash hands before eating, drinking, chewing gum, using tobacco or using the toilet. x Remove clothing immediately if pesticide gets inside . Then wash thoroughly and put on clean clothing. First Aid If in eyes: Hold eye open and rinse slowly and gently with water for 15-20 minutes. Remove contact lenses, if present, after the first 5 minutes, then continue rinsing. Call a poison control center or doctor for treatment advice. If on skin: Take off contaminated clothing. Rinse skin immediately with plenty of water for 15-20 minutes. Call a poison control center or doctor for treatment advice. If swallowed: Call a poison control center or doctor immediately for treatment advice. Have person sip a glass of water if able to swallow. Do not induce vomiting unless told to do so by a poison control center or doctor. Do not give anything by mouth to an unconscious person. Have the product container or label with you when calling a poison control center or doctor or going for treatment. You may also contact 1-800-992-5994 for emergency medical treatment information. Environmental Hazards Do not apply directly to water, to areas where surface water is present or to intertidal areas below the mean high water mark. Do not contaminate water when disposing of equipment washwater or rinsate. NON-TARGET ORGANISM ADVISORY: This product is toxic to plants and may adversely impact the forage and habitat of non-target organisms, including pollinators, in areas adjacent to the treated site. Protect the forage and habitat of non-target organisms by following label directions intended to minimize spray drift. Groundwater Advisory: This product is known to leach through soil into groundwater under certain conditions as a result of label use. This product may leach into groundwater if used in areas where soils are permeable, particularly where the water table is shallow. Users are advised not to apply this product where soils have a rapid to very rapid permeability (such as loamy sand to sand) and the water table of an underlying aquifer is shallow or to soils containing sinkholes over limestone bedrock, severely fractured surfaces, and substrates which would allow direct introduction into an aquifer. Your local agricultural agencies can provide further information on the type of soil in your area and the location of groundwater. Surface Water Advisory: This product may impact surface water quality due to runoff of rainwater. This is especially true for poorly draining soils and soils with shallow groundwater. This product is classified as having high potential for reaching both surface water and aquatic sediment via runoff for several months after application. A level, well-maintained vegetative buffer strip between areas to which this product is applied and surface water features such as ponds, streams, and springs will reduce the potential loading of metsulfuron-methyl and aminopyralid from runoff water and sediment. Runoff of this product will be reduced by avoiding applications when rainfall or irrigation is expected to occur within 48 hours. Irrigation Water Statement: Do not contaminate water intended for irrigation or domestic purposes. To avoid injury to crops or other desirable plants, do not treat or allow spray drift or run-off to fall onto banks or bottoms of irrigation ditches, either dry or containing water, or other channels that carry water that may be used for irrigation or domestic purposes. Do not apply to snow or frozen ground. Windblown Soil Particles Advisory This product has the potential to move off-site due to wind erosion. Soils that are subject to wind erosion usually have a high silt and/or fine to very fine sand fractions and low organic matter content. Other factors which can affects the movement of windblown soil include the intensity and direction of prevailing winds, vegetative cover, site slope, rainfall, and drainage patterns. Avoid applying this product if prevailing local conditions may be expected to result in off-site movement.

Agricultural Use Requirements Use this product only in accordance with its labeling and with the Worker Protection Standard, 40 CFR part 170. This Standard contains requirements for the protection of agricultural workers on farms, forests, nurseries, and greenhouses, and handlers of agricultural pesticides. It contains requirements for training, decontamination, notification, and emergency assistance. It also contains specific instructions and exceptions pertaining to the statements on this label about Personal Protective Equipment (PPE) and restricted-entry interval. The requirements in this box only apply to uses of this product that are covered by the Worker Protection Standard. Do not enter or allow worker entry into treated areas during the restricted entry interval (REI) of 48 hours. PPE required for early entry to treated areas that is permitted under the Worker Protection Standard and that involves contact with anything that has been treated, such as plants, soil, or water, is: x Coveralls x Chemical-resistant gloves made of barrier laminate or Viton ≥14 mils x Shoes plus socks Non-Agricultural Use Requirements The requirements in this box apply to uses of this product that are NOT within the scope of the Worker Protection Standard for Agricultural Pesticides (40 CFR Part 170). The WPS applies when this product is used to produce agricultural plants on farms, forests, nurseries, or greenhouses. Entry Restrictions for Non-WPS Uses: Do not enter or allow people or pets to enter the treated area until sprays have dried.

Use Restrictions Consult with a Corteva Agriscience representative if you do not understand the Use Restrictions. Call 800-258-3033 for more information. IMPORTANT USE PRECAUTIONS AND RESTRICTIONS TO PREVENT INJURY TO DESIRABLE PLANTS x Carefully read the section Restrictions in Hay or Manure Use. x It is mandatory to follow the Use Restrictions section of this label. x Manure and urine from animals consuming grass or hay treated with this product may contain enough aminopyralid to cause injury to sensitive broadleaf plants. x Hay can only be used on the farm or ranch where product is applied. x Consult with a Corteva Agriscience representative if you do not understand the Use Precautions and Restrictions. Call 800-258-3033 Customer Information Group. x For more information on how to manage materials treated with aminopyralid and to prevent this product from contaminating compost please visit https://www.epa.gov/ingredients-used-pesticide-products/registration-review-pyridine-and-pyrimidine-herbicides x Do not use grasses treated with Chaparral in the preceding 18 months for hay intended for export outside the United States. x Do not use hay or straw from areas treated with Chaparral within the preceding 18 months or manure from animals feeding on hay treated with Chaparral in compost. x Do not use grasses treated with Chaparral in the preceding 18 months for seed production. Maximum Application Rate: On all labeled use sites do not broadcast apply more than 3.3 ounce/acre of Chaparral per year. The total amount of Chaparral applied broadcast, as a re-treatment, and/or spot treatment cannot exceed 3.3 oz of product per acre per year. Spot treatments may be applied at an equivalent broadcast rate of up to 6.6 oz product of Chaparral per acre per annual growing season; however, not more than 50% of an acre may be treated at that rate. Do not apply more than a total of 3.3 ounce/acre of Chaparral per annual growing season as a result of broadcast, spot, or repeat applications. x Do not use on Timothy hay or other cool-season grasses grown for hay . x Do not apply this product on lawns, turf, ornamental plantings, urban walkways, driveways, tennis courts, golf courses, athletic fields, commercial sod operations, or other high-maintenance, fine turfgrass areas, or similar areas. x Do not overseed ryegrass for 4 months after treatment. x Chaparral is highly active against many broadleaf plant species. Do not use this product on areas where loss of broadleaf plants, including legumes, cannot be tolerated. x Chemigation: Do not apply this product through any type of irrigation system. x Do not contaminate water intended for irrigation or domestic purposes. Do not treat inside banks or bottoms of irrigation ditches, either dry or containing water, or other channels that carry water that may be used for irrigation or domestic purposes. x Do not apply to irrigated land where the tailwater will be used to irrigate crops. x Do not use this product for impregnation on dry fertilizer unless specified in Corteva Agriscience state-specific product bulletin. x Do not use Chaparral in the following counties of Colorado: Alamosa, Conejos, Costilla, Rio Grande, and Saguache. x Trees adjacent to or in a treated site can occasionally be affected by root uptake of Chaparral. Do not apply Chaparral within the root zone of desirable trees unless such injury can be tolerated. Use special caution near roses, and leguminous trees such as locusts, redbud, mimosa, and caragana. o Do not apply or drain or flush equipment on or near desirable trees or other plants, or on areas where their roots extend, or in locations where the product may be washed or moved into contact with their roots, as injury or loss of desirable trees or other plants may result. x Applications made during periods of intense rainfall, to soils saturated with water, surfaces paved with materials such as asphalt or concrete, or soils through which rainfall will not readily penetrate may result in runoff and movement of Chaparral. Injury to crops may result if treated soil and/or runoff water containing Chaparral is washed, or moved onto land used to produce crops. Exposure to Chaparral may injure or kill susceptible crops and other plants, such as grapes, soybeans, tobacco, sensitive ornamentals. Do not treat frozen soil where runoff could damage sensitive plants. x Seeding Legumes: Do not plant forage legumes until a soil bioassay has been conducted to determine if aminopyralid or metsulfuron concentration remaining in the soil will adversely affect the legume establishment. x Under certain conditions such as heavy rainfall, high pH, prolonged cold weather, or wide fluctuations in day/night temperatures prior to or soon after Chaparral application, temporary discoloration, and/or grass injury may occur. Chaparral should not be applied to grass that is stressed by severe weather conditions, drought, low fertility, water-saturated soil, disease, or insect damage, as grass injury may result. Severe winter stress, drought, disease, or insect damage before or following application also may result in grass injury. x Do not apply to frozen ground as surface runoff may occur. x Do not apply to snow-covered ground. x Grazing and Haying Restrictions: There are no restrictions on grazing or grass hay harvest intervals following application of Chaparral at labeled rates. However, cutting hay too soon after spraying weeds will reduce weed control. Wait 14 days after herbicide application to cut grass hay to allow herbicide to work. x Grazing Poisonous Plants: Application of this product may increase palatability of certain poisonous plants. Do not allow livestock to graze areas treated with Chaparral until poisonous plants are dry and no longer palatable to livestock. x Restrictions in Hay or Manure Use: Do not use treated plant residues , including hay or straw from areas treated within the preceding 18 months, in compost, mulch, or mushroom spawn. Do not use manure from animals that have grazed forage or eaten hay harvested from treated areas within the previous 3 days, in compost, mulch, or mushroom spawn. Do not plant a broadleaf crop (including soybeans, sunflower, tobacco, vegetables, field beans, peanuts, and potatoes) in fields treated with manure from animals that have grazed forage or eaten hay harvested from aminopyralid-treated areas until an adequately sensitive field bioassay is conducted to determine that the aminopyralid concentration in the soil is at level that is not injurious to the crop to be planted. Do not plant a broadleaf crop in fields treated in the previous year with manure from animals that have grazed forage or eaten hay harvested from treated areas until an adequately sensitive field bioassay is conducted to determine that the aminopyralid concentration in the soil is at level that is not injurious to the crop to be planted. To promote herbicide decomposition, plant residues should be evenly incorporated in the surface soil or burned. Breakdown of aminopyralid in plant residues or manure is more rapid under warm, moist soil conditions and may be enhanced by supplemental irrigation. x Off-site Compost and Animal Feed/Bedding Restrictions This product is persistent and may be present in treated plant materials for months to years after application. Do not sell or transport treated plant materials or manure from animals that have grazed on treated plant materials off-site for compost distribution or for use as animal bedding/feed for 18 months after application. Treated plant materials can be recycled onsite or left in the field to decompose. Manure from animals that have grazed or eaten forage or hay harvested from treated areas within the previous 3 days may only be applied to the fields where the following crops will be grown: pasture grasses, grass grown for seed, wheat, and corn. Animals that have been fed aminopyralid-treated forage must be fed forage free of aminopyralid for at least 3 days before movement to an area where manure may be collected or sensitive crops are grown. x Crop Rotation: Do not rotate to any crop from rangeland, permanent pasture, or CRP acres within one year following treatment. Cereals and corn can be planted one year after treatment. Most broadleaf crops are more sensitive and can require at least 2 years depending on the crop and environmental conditions. Do not plant a broadleaf crop until an adequately sensitive field bioassay shows that the level of aminopyralid or metsulfuron present in the soil will not adversely affect that broadleaf crop. x Field Bioassay Instructions: In fields previously treated with this product, plant short test rows of the intended rotational crop across the original direction of application in a manner to sample variability in field conditions such as soil texture, soil organic matter, soil pH, rainfall pattern, or drainage. The field bioassay can be one year after the last application of aminopyralid in that field. Observe the test crop for symptoms of herbicidal activity, such as poor stand (effect on seed germination), chlorosis (yellowing), and necrosis (dead leaves or shoots), or stunting (reduced growth). If herbicidal symptoms do not occur, the test crop can be grown. If there is apparent herbicidal activity, do not plant the field to the intended rotational crop; plant only to wheat, perennial forage grasses, native grasses or grasses grown for hay. x Avoiding Injury to Non-Target Plants: Do not aerially apply Chaparral within 50 feet of a border downwind (in the direction of wind movement), or allow spray drift to come in contact with, any broadleaf crop or other desirable broadleaf plants, including, but not limited to, alfalfa, cotton, dry beans, flowers, grapes, lettuce, potatoes, radishes, soybeans, sugar beets, sunflowers, tobacco, tomatoes or other broadleaf or vegetable crop, fruit trees, ornamental plants, or soil where sensitive crops are growing or will be planted. Avoid application under conditions that may allow spray drift because very small quantities of spray may seriously injure susceptible crops. Read the Spray Drift Management section of this label to help minimize the potential for spray drift. x To reduce the potential for movement of treated soil due to wind erosion, do not apply to powdery dry or light sandy soils until they have been stabilized by rainfall, plant residue mulch, reduced tillage, or other cultural practices. Injury to immediately adjacent crops may occur when treated soil is blown onto land used to produce crops other than pasture, rangeland, or CRP. Record Keeping For Applications to Pastures The applicator must document that they have notified property owners/operators or customers, in writing, of the compost and animal feed/bedding prohibitions within 14 days of the application. Applicators must keep the records of notification for two years. This record must include date of application, the name of the applicator, the EPA registration number of the product applied, area(s) treated, and a copy of the written notification provided to the property owner/operator. Notification may be made via email, via mail, via paper handout, or by any other written communication method. Records must be made available to State Pesticide Regulatory Official(s) and to EPA upon request. If this information is already being retained, duplicate records are not needed. It is recommended that applicators also transmit at the time of notification relevant educational materials for managing treated plant matter, as available. Additional educational materials for aminopyralid will be posted at: https://www.epa.gov/ingredients-used-pesticide-products/registration-review-pyridine-and-pyrimidine-herbicides Applications to pastures by property owners/operators on their own property are exempt from this notification and recordkeeping requirement. Application to pastures on public land (i.e., lands managed directly by state, tribal, or local authorities) are exempt from this notification requirement. Sprayer Clean-Out Instructions It is recommended to use separate spray equipment on highly sensitive crops such as tobacco, soybeans, peanuts, and tomatoes. Do not use spray equipment used to apply Chaparral for other applications to land planted to, or to be planted to, broadleaf plants unless it has been determined that all residues of this herbicide has been removed by thorough cleaning of equipment. Equipment used to apply Chaparral should be thoroughly cleaned before reusing to apply any other chemicals as follows: 1. Rinse and flush application equipment thoroughly after use. Dispose of rinse water in non-cropland area away from water supplies. 2. Rinse a second time, adding 1 quart of household ammonia or tank cleaning agent for every 25 gallons of water. Circulate the solution through the entire system so that all internal surfaces are contacted (15 to 20 minutes). Let the solution stand for several hours, preferably overnight. 3. Flush the solution out of the spray tank through the boom. 4. Rinse the system twice with clean water, recirculating and draining each time. 5. Spray nozzles and screens should be removed and cleaned separately. Do not apply this product with mist blower systems that deliver very fine spray droplets. Use of mist blower equipment can reduce control achieved with the herbicide and increase spray drift potential.

Storage and Disposal Do not contaminate water, food, feed, or fertilizer by storage or disposal. Pesticide Storage: Store in original container only. In case of spill, contain material and dispose as waste. Pesticide Disposal: Wastes resulting from the use of this product may be disposed of on site or at an approved waste disposal facility. Container Handling: Nonrefillable container. Do not reuse or refill this container. Offer for recycling if available, or puncture and dispose of in a sanitary landfill, or by incineration, or by other procedures allowed by state and local authorities. Triple rinse or pressure rinse container (or equivalent) promptly after emptying. Triple rinse as follows: Empty the remaining contents into application equipment or a mix tank and drain for 10 seconds after the flow begins to drip. Fill the container 1/4 full with water and recap. Shake for 10 seconds. Pour rinsate into application equipment or a mix tank or store rinsate for later use or disposal. Drain for 10 seconds after the flow begins to drip. Repeat this procedure two more times. Pressure rinse as follows: Empty the remaining contents into application equipment or a mix tank and continue to drain for 10 seconds after the flow begins to drip. Hold container upside down over application equipment or mix tank or collect rinsate for later use or disposal. Insert pressure rinsing nozzle in the side of the container, and rinse at about 40 psi for at least 30 seconds. Drain for 10 seconds after the flow begins to drip.