ChaparralRegistration expired
Dow AgroSciences - Herbicide
62719-597

Registratration Number: 62719-594
States available in: 
AL AK AZ AR CO CT DE FL GA HI ID IL IN IA KS KY LA ME MD MA MI MN MS MO MT NE NV NH NJ NM NC ND OH OK OR PA RI SC SD TN TX UT VT VA WA WV WI WY

Application Methods
Apply the specified rate of Chaparral as a coarse low-pressure spray. Do not apply this product with mist blower systems that deliver very fine spray droplets. Spray volume should be sufficient to uniformly cover foliage. Increase spray volume to ensure thorough and uniform coverage when target vegetation is tall and/or dense. To enhance foliage wetting and coverage, an approved non-ionic agricultural surfactant may be added to the spray mixture as specified by the surfactant label.

Ground Broadcast Application: Higher spray volumes (greater than 10 gallons per acre) generally provide better coverage and better control, particularly in dense and/or tall foliage.

Aerial Broadcast Application: Do not apply less than 2 gallons per acre total spray volume. Five gallons per acre or greater will generally provide better coverage and better control, particularly in dense and/or tall foliage.

High-Volume Foliar Application: High volume foliar treatments may be applied at rates equivalent to a maximum of 3.3 ounces per acre annual growing season. Use sufficient spray volume to thoroughly and uniformly wet foliage and stems.

Spot Application: Spot treatments may be applied at an equivalent broadcast rate of up to 6.6 oz of product 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. Spray volume should be sufficient to thoroughly and uniformly wet weed foliage, but not to the point of runoff. Repeat treatments may be made, but the total amount of Chaparral applied must not exceed 3.3 ounce/acre per year. To prevent misapplication, spot treatments should be applied with a calibrated sprayer.

In general for spot treatments, mix 2.5 oz for weeds and 3.3 oz for brush of Chaparral per 100 gallons of water (assuming an application volume of 100 gallons per acre).

Product Measurement
Chaparral is measured using the Chaparral volumetric measuring cylinder. Scales calibrated in ounces may also be used.

Mixing Instructions
1. Fill the tank 1/4 to 1/3 full of water (If using liquid nitrogen fertilizer solution in place of water, see Tank Mixtures sections for additional details).
2. While agitating, add the required amount of Chaparral.
3. Continue agitation until the Chaparral is fully dispersed, at least 5 minutes.
4. Once the Chaparral is fully dispersed, maintain agitation and continue filling tank with water. Chaparral should be thoroughly mixed with water before adding any other material.
5. As the tank is filling, add tank mix partners (if desired) then add the necessary volume of spray adjuvants. Always add spray adjuvants last.
6. If the mixture is not continuously agitated, settling will occur. If settling occurs, thoroughly re-agitate before using.
7. Apply Chaparral spray mixture within 24 hours of mixing to avoid product degradation.
8. If Chaparral and a tank mix partner are to be applied in multiple loads, pre-slurry the Chaparral inclean water prior to adding to the tank. This will prevent the tank mix partner from interfering with the dissolution of the Chaparral.

Soil pH Limitations

Chaparral should not be used on soils having a pH above 7.9, as extended soil residual activity could extend crop rotation intervals beyond normal. Under certain conditions, Chaparral could remain in the soil for 34 months or more injuring wheat and barley. In addition, other crops planted in high-pH soils can be extremely sensitive to low concentrations of Chaparral.

Checking Soil pH
Before using Chaparral, determine the soil pH of the areas of intended use. To obtain a representative pH value for the test area, take several 0” to 4” samples from different areas of the field and analyze them separately. Consult local extension publications for additional information on recommended soil sampling procedures.

Spray Adjuvants
Unless otherwise directed, applications of Chaparral must include either a crop oil concentrate or a nonionic surfactant. In addition, an ammonium nitrogen fertilizer can be used unless specifically prohibited by tank mix partner labeling. If another herbicide is tank mixed with Chaparral, select adjuvants authorized for use with both products. Products must contain only EPA-exempt ingredients (40 CFR 1001).

Petroleum Crop Oil Concentrate (COC) or Methylated Seed Oil (MSO)
- Apply at 1% v/v (1 gallon per 100 gallons spray solution) or 2% under arid conditions.
- MSO adjuvants may be used at 0.5% v/v (0.5 gallons per 100 gallons spray solution) if specifically noted on adjuvant product labeling.
- Oil adjuvants must contain at least 80% high quality, petroleum (mineral) or modified vegetable seed oil with at least 15% surfactant emulsifiers.

Nonionic Surfactant (NIS)
- Apply at 0.25% v/v (1 quart per 100 gallons spray solution) or 0.5% under arid conditions.
- Surfactant products must contain at least 60% nonionic surfactant with a hydrophilic/lipophilic balance (HLB) greater than 12.

Ammonium Nitrogen Fertilizer
- Use 2 quarts/acre of a high-quality urea ammonium nitrate (UAN), such as 28%N or 32%N, or 2 pounds/acre of a spray grade ammonium sulfate (AMS). Use 4 quarts/acre UAN or 4 pounds/acre AMS under arid conditions.
- Pensacola bahiagrass control can be reduced when Chaparral is applied in liquid fertilizer solutions.

Mixing With Liquid Nitrogen Solution Fertilizer
Liquid nitrogen fertilizer solutions may be used as a carrier in place of water. Run a tank mix compatibility test before mixing Chaparral in fertilizer solution.
Chaparral must first be slurried with water and then added to liquid nitrogen solutions (e.g., 28-0-0, 32-0-0). Ensure that the agitator is running while the Chaparral is added. Use of this mixture may result in temporary grass yellowing and stunting.
If using low rates of liquid nitrogen fertilizer (less than 50% of the spray solution volume) in the spray solution, the addition of a non-ionic surfactant is necessary. Add surfactant at 1/4 pt per 100 gal of spray solution (0.03% v/v ). 
Do not use a spray adjuvant other than non-ionic surfactant. When using high rates of liquid nitrogen fertilizer (greater than or equal to 50% of the spray solution volume) in the spray solution, adding spray adjuvant(s) increases the risk of grass injury. Consult your agricultural dealer, consultant, fieldman, or Dow AgroSciences representative for a specific recommendation before adding an adjuvant to these tank mixtures.
If 2,4-D or MCPA is included with Chaparral and the fertilizer mixture, ester formulations tend to be more compatible (See manufacturer’s label). Do not add spray adjuvants when using Chaparral in tank mix with 2,4-D ester and liquid nitrogen fertilizer solutions.
Do not use low rates of liquid fertilizer as a substitute for spray adjuvants.
Do not use with liquid fertilizer solutions with a pH less than 3.0.

Special Adjuvant Types
- Combination adjuvant products may be used at doses that provide the required amount of NIS, COC, MSO and/or ammonium nitrogen fertilizer. Consult product literature for use rates and restrictions. Exception: On tall fescue pastures use a reduced rate of 1/2 to 1 pint non-ionic surfactant per 100 gallons.
- Antifoaming agents may be used if needed.
- Do not use Chaparral with spray additives that reduce the pH of the spray solution to below 3.0.

Tank Mixing with Other Herbicides: Chaparral at rates of up to 3.3 ounce/acre may be mixed with labeled rates of other herbicides registered for application on all labeled use sites. Chaparral may be applied in tank-mix combination with labeled rates of other herbicides provided: (1) the tank-mix product is labeled for the timing and method of application for the use site to be treated and (2) mixing is not prohibited by the label of the registered tank mixed products, and (3) that the tank-mix combination is physically compatible (see tank-mix compatibility testing below). When tank mixing, use only in accordance with the restrictions, precautions and limitations on the respective product labels.
- Read carefully and follow all applicable use directions, precautions, and limitations on the respective product labels.
- Do not exceed specified application rates. If products containing the same active ingredient are mixed, do not exceed the maximum allowable active ingredient use rates.
- For direct injection or other spray equipment where the product formulations will be mixed in undiluted form, special care should be taken to ensure tank mix compatibility.
- Always perform a jar test to ensure the compatibility of products to be used in tank mixture.

Tank Mix Compatibility Testing: Perform a jar test prior to mixing in a spray tank to ensure compatibility of Chaparral and other pesticides or carriers. Use a clear glass jar with lid and mix ingredients in the same order and proportions as will be used in the spray tank. The mixture is compatible if the materials mix readily when the jar is inverted several times. The mixture should remain stable after standing for 1/2 hour or, if separation occurs, should readily remix if agitated. An incompatible mixture is indicated by separation into distinct layers that do not readily remix when agitated and/or the presence of flakes, precipitates, gels, or heavy oily film in the jar. Use of an appropriate compatibility aid may resolve mix incompatibility. If the mixture is incompatible do not use that tank mix partner in tank mixtures. Note: Foliar-applied liquid fertilizers themselves can cause yellowing of the foliage of forage grasses and other vegetation.

Seeding grasses:
Preemergence: In general, Chaparral may be applied in the spring or early summer, depending on the target weed species, as a broadcast application over grass that was planted at least 4 months prior to the application and that has been growing under favorable conditions for grass establishment. With fall applications, do not plant grasses the following spring. Do not overseed ryegrass for 4 months after treatment.

Use Rates and Timing
Chaparral may be applied post emergence as a broadcast spray or as a spot application to control weeds and brush including, but not limited to, those listed on this label. When a rate range is given use the higher rate to control weeds at advanced growth stages, or under less than favorable growing conditions, or for longer residual control. Best results are obtained when spray volume is sufficient to provide uniform coverage of treated weeds. For optimum uptake and translocation of Chaparral, avoid mowing, haying, shredding, burning or soil disturbance in treated areas for at least 14 days following application. Chaparral also provides preemergence control of emerging seedlings of susceptible weeds, and re-growth of certain perennial weeds following application. Preventing establishment of weeds will depend upon application rate, season of application, and environmental conditions after application. Chaparral can provide long-term control of susceptible weeds. The length of control is dependent upon the application rate, condition and growth stage of target weeds, environmental conditions at and following application, and the density and vigor of competing desirable vegetation. Long-term weed control is most effective where grass vegetation is allowed to recover from overgrazing, drought, etc., and compete with weeds. Chaparral can be an important component of integrated vegetation management programs designed to renovate or restore desired plant communities. To maximize and extend the benefits of weed control provided by Chaparral, it is important that other vegetation management practices, including proper grazing management, biological control agents, replanting, fertilization, prescribed fire, etc., be used in appropriate sequences and combinations to further alleviate the adverse effects of weeds on desirable plant species and to promote development of desired plant communities. Agricultural and natural resources specialists with federal and state government agencies can provide guidance on best management practices and development of integrated vegetation management programs.

Species Controlled
Grass Weeds Controlled or Supressed by Chaparral

Common Name: arrowgrass, seaside
Rate: 
3.0-3.3 oz product/a

Common Name: bahiagrass, Pensacola
Rate: 2.0-2.5 oz product/a

Common Name: ryegrass
Rate: 2.0-2.5 oz product/a

Pensacola bahiagrass control in established Bermudagrass pasture: Apply Chaparral at 2-2.5 ounce/acre after green-up in the spring, but before bahiagrass seedhead formation. Application should be made when environmental conditions favor grass growth. Bahiagrass suppression could take up to 30 days before the desired level of control is achieved. Application of 2,4-D mixed with Chaparral could decrease bahiagrass control. In pastures severely infested with bahiagrass, a positive response in forage yield may be slowed until desired forage grasses, like bermudagrass, grow into areas previously infested with bahiagrass. To reduce this effect consider treating different portions of heavily infested pastures with Chaparral over a period of several years. Do not apply Chaparral to an entire farm or ranch in one year. Fertilization and/or replanting may accelerate bermudagrass recovery following bahiagrass control with Chaparral. Bahiagrass regrowth may occur in pastures heavily infested with bahiagrass, intense grazing pressure, or when adverse environmental conditions (heat and drought), slows the recovery of desired grass forages. Chaparral will not control common or Argentine bahiagrass. Pensacola bahiagrass control can be reduced when Chaparral is applied in liquid fertilizer solutions.

General Mix of Broadleaf Weeds: Chaparral at 2.0 ounce/acre is the standard rate to provide control of most pasture weeds when applied early in the season. If a certain weed is dominant in the pasture, use the rate in Table 2 for that species. The addition of 0.5 lbs ae/acre (1 pint/acre of 4 lb ae/gallon 2,4-D) 2,4-D amine may broaden the weed spectrum. For rates for specific weeds, see Table 2. The life cycle is included for each weed species. The general timing of application for each life cycle is as follows:
Annuals: Use lower rates when weeds are less than 6 inches and actively growing. Increase rate as season progresses and plants become more mature.
Biennials: Apply in the spring and early summer to rosette or bolting plants or in the fall to seedlings and rosettes before ground is frozen. Use higher rates after bolting through early flower.
Perennials: Apply to vegetative stage prior to bloom. Use higher rate when weeds are larger.
For best results, most weeds should be treated when they are actively growing and under conditions favorable for growth. Use a higher rate in the rate range indicated when growing conditions are less than favorable (drought conditions), weeds are large and mature, weed density and foliage cover is high and canopy height is tall, or when residual control is desired. Chaparral also provides preemergence control of germinating seeds or seedlings of susceptible weeds following application.

Broadleaf Species Controlled with Chaparral
Common Name: actinomeris, wingstem
Rate: 3.0

Common Name: alyssum, hoary 
Rate: 2.0-2.5 oz product/a

Common Name: amaranth, spiny 
Rate: 1.5-2.0 oz product/a

Common Name: aster 
Rate: 1.5-2.0 oz product/a

Common Name: babysbreath 
Rate: 2.5-3.0 oz product/a

Common Name: bedstraw 
Rate: 2.0-2.5 oz product/a

Common Name: beggarticks 
Rate: 2.0-3.0 oz product/a

Common Name: bittercress 
Rate: 2.0-2.5 oz product/a

Common Name: blackeyed-Susan Rudbeckia hirta annual Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: brackenfern Pteridiums spp. perennial Dennstaedtiaceae
Rate: 2.5-3.3 oz product/a

Common Name: broomweed, annual Amphiachyris dracunculoides annual Asteraceae
Rate: 1.0-1.5 oz product/a

Common Name: bur buttercup (testiculate) Ranunculus testiculatus annual Ranunculaceae
Rate: 1.0-1.5 oz product/a

Common Name: burclover Medicago spp annual Fabaceae
Rate: 1.5-2.0 oz product/a

Common Name: burdock, Common Arctium minus biennial Asteraceae
Rate: 2.0-2.5 oz product/a

Common Name: buttercup, hairy Ranunculus sardous perennial Ranunculaceae
Rate: 1.0-1.5 oz product/a

Common Name: buttercup, tall Ranunculus acris perennial Ranunculaceae
Rate: 2.0-2.5 oz product/a

Common Name: camelthorn Alhagi pseudalhagi perennial Fabaceae
Rate: 2.0-3.0 oz product/a

Common Name: cat's ear, common Hypochaeris radicata perennial Asteraceae
Rate: 2.5-3.3 oz product/a

Common Name: camphorweed Heterotheca subaxillaris summer annual Asteraceae
Rate: 2.0-3.0 oz product/a

Common Name: campion, bladder‡ Silene vulgaris perennial Caryophyllaceae
Rate: 2.0-2.5 oz product/a

Common Name: caraway, wild Carum carvi biennial Apiaceae
Rate: 2.5-3.0 oz product/a

Common Name: carrot, wild Daucus carota biennial Apiaceae
Rate: 2.0-2.5 oz product/a

Common Name: catchfly, conical Silene conoidea annual Caryophyllaceae
Rate: 1.0-1.5 oz product/a

Common Name: chamomile Matricaria spp annual Asteraceae
Rate: 2.5-3.0 oz product/a

Common Name: chickweed, common Stellaria media Winter annual Caryophyllaceae
Rate: 3.0 oz product/a

Common Name: chicory Cichorium intybus perennial Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: cinquefoil* Potentilla spp perennial Rosaceae
Rate: 2.0-2.5 oz product/a

Common Name: clover, sweet Melilotus officinalis biennial Fabaceae
Rate: 2.5-3.0 oz product/a

Common Name: clover, white Trifolium repens perennial Fabaceae
Rate: 1.5-2.0 oz product/a

Common Name: cockle, corn Agrostemma githago annual Caryophyllaceae
Rate: 2.0-3.0 oz product/a

Common Name: cocklebur Xanthium strumarium annual Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: coreopsis, plains Coreopsis tinctoria annual Asteraceae
Rate: 2.0-3.0 oz product/a

Common Name: cowcockle Vaccaria pyramidata annual Caryophyllaceae
Rate: 1.5-2.0 oz product/a

Common Name: crazyweed, silky Oxytropis Lambertii perennial Fabaceae
Rate: 2.0-2.5 oz product/a

Common Name: croton, woolly Croton capitatus annual Euphorbiaceae
Rate: 1.5-2.0 oz product/a

Common Name: crownvetch Securigera varia perennial Fabaceae
Rate: 1.5-2.0 oz product/a

Common Name: crupina, common Crupina vulgaris perennial Asteraceae
Rate: 3.0-3.3 oz product/a

Common Name: cudweed, purple Gnaphalium purpureum annual Asteraceae
Rate: 2.0-2.5 oz product/a

Common Name: daisy, oxeye* Leucanthemum vulgare perennial Asteraceae
Rate: 2.5-3.3 oz product/a

Common Name: dandelion, common Taraxacum officinale perennial Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: dock Rumex spp perennial Polygonaceae
Rate: 2.0-2.5 oz product/a

Common Name: dyer's woad‡ Istis tinctoria perennial Brassicaceae
Rate: 3.3 oz product/a

Common Name: evening primrose, cutleaf Oenothera laciniata annual Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: false dandelion, Carolina Tragopogon dubius biennial Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: falseflax, Smallseed Camelina microcarpa annual/biennial Brassicaceae
Rate: 1.5-2.0 oz product/a

Common Name: fiddleneck, common Amsinckia intermedia annual Boraginaceae
Rate: 1.5-2.0 oz product/a

Common Name: filaree, redstem Erodium cicutarium annual/biennial Geraniaceae
Rate: 3.0-3.3 oz product/a

Common Name: fireweed Epilobium angustifolium perennial Onagracee
Rate: 2.5-3.0 oz product/a

Common Name: fleabane, annual Erigeron annus annual Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: fleabane, hairy Conyza bonariensis annual/biennial Asteraceae
Rate: 2.5-3.3 oz product/a

Common Name: garlic. wild Allium vineale perennial Liliaceae
Rate: 1.5-2.0 oz product/a

Common Name: geranium, Carolina Geranium carolinianum Winter annual Geraniaceae
Rate: 1.5-2.0 oz product/a

Common Name: goldenrod spp Solidago canadensis perennial Asteraceae
Rate: 2.0-2.5 oz product/a

Common Name: gumweed, curlycup Grindelia squarrosa biennial Asteraceae
Rate: 2.0-2.5 oz product/a

Common Name: halogeton Halogeton glomeratus annual Chenopodiaceae
Rate: 3.0-3.3 oz product/a

Common Name: hawkweed, orange* Hieracium aurantiacum perennial Asteraceae
Rate: 2.5-3.3 oz product/a

Common Name: hawkweed, yellow* Hieracium pratense perennial Asteraceae
Rate: 2.5-3.3 oz product/a

Common Name: hemlock, poison‡ Conium maculatum perennial Apiaceae
Rate: 2.5 3.3 oz product/a

Common Name: henbane, black Hyoscyamus niger annual/biennial Solanaceae
Rate: 2.5-3.0 oz product/a

Common Name: henbit Lamium amplexicaule annual/biennial Lamiaceae
Rate: 2.0-2.5 oz product/a

Common Name: hogweed, giant Heracleum mantegazzianum perennial Apiaceae
Rate: 3.3 oz product/a

Common Name: horsemint (beebalm) Monarda spp annual Lamiaceae
Rate: 1.5-2.0 oz product/a

Common Name: horsenettle, Carolina Solanum carolinense perennial Solanaceae
Rate: 2.0-2.5 oz product/a

Common Name: horseweed (marestail) Conyza canadensis annual Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: houndstongue* Cynoglossum officinale biennial Boraginaceae
Rate: 2.5-3.3 oz product/a

Common Name: ironweed, tall Vernonia gigantea perennial Asteraceae
Rate: 2.0-3.0 oz product/a

Common Name: ironweed, western Vernonia baldwinii perennial Asteraceae
Rate: 2.0-3.0 oz product/a

Common Name: knapweed Centaurea sp. biennial Asteraceae
Rate: 2.5-3.3 oz product/a

Common Name: knapweed, brown Centaurea jacea perennial Asteraceae
Rate: 2.5-3.3 oz product/a

Common Name: knapweed, diffuse* Centaurea diffusa biennial Asteraceae
Rate: 2.5-3.3 oz product/a

Common Name: knapweed, Russian* Acroptilon repens perennial Asteraceae
Rate: 2.5-3.3 oz product/a

Common Name: knapweed, spotted* Centaurea stoebe biennial Asteraceae
Rate: 2.5-3.3 oz product/a

Common Name: knotweed, prostrate Polygonum aviculare annual Polygonaceae
Rate: 3.0 oz product/a

Common Name: kochia* Kochia scoparia annual Chenopodiaceae
Rate: 1.5-2.0 oz product/a

Common Name: lady’s thumb Polygonum persicaria annual Polygonaceae
Rate: 1.5-2.0 oz product/a

Common Name: lambsquarters, common Chenopodium album annual Chenopodiaceae
Rate: 2.0-2.5 oz product/a

Common Name: lespedeza, annual Lespedeza striata annual Fabaceae
Rate: 2.0-2.5 oz product/a

Common Name: lespedeza, sericea* Lespedeza cuneata perennial Fabaceae
Rate: 2.5-3.0 oz product/a

Common Name: lettuce, Miner's Montia perfoliata annual Portulacaceae
Rate: 1.5-2.0 oz product/a

Common Name: lettuce, prickly* Lactuca serriola annual Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: licorice, wild Glycyrrhiza lepidota perennial Fabaceae
Rate: 2.5-3.0 oz product/a

Common Name: locoweed Astragalus spp. perennial Fabaceae
Rate: 2.0-2.5 oz product/a

Common Name: loosestrife, purple Lythrum salicaria perennial Lythraceae
Rate: 3.0-3.3 oz product/a

Common Name: marshelder, annual‡ Iva annua annual Asteraceae
Rate: 2.0-2.5 oz product/a

Common Name: mayweed, scentless Tripleurospermum perforata annual Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: mayweed, stinking Anthemis cotula annual Asteraceae
Rate: 3.0-3.3 oz product/a

Common Name: medic, black Medicago lupulina perennial Fabaceae
Rate: 2.0-2.5 oz product/a

Common Name: mexicantea Dysphania ambrosioides annual/ perennial Chenopodiaceae
Rate: 2.0-2.5 oz product/a

Common Name: mullein* Verbascum spp. biennial Scrophulariaceae
Rate: 2.0-3.3 oz product/a

Common Name: mustard, blue* Chorispora tenella annual Brassicaceae
Rate: 1.5-2.0 oz product/a

Common Name: mustard, garlic Alliaria petiolata biennial Brassicaceae
Rate: 3.3 oz product/a

Common Name: mustard, tumble/Jim Hill Sisymbrium altissimum Winter annual Brassicaceae
Rate: 1.5-2.0 oz product/a

Common Name: mustard, wild Brassica kaber annual Brassicaceae
Rate: 1.5-2.0 oz product/a

Common Name: needles, Spanish needles Bidens bipinnata annual Asteraceae
Rate: 2.0-2.5 oz product/a

Common Name: nightshade, silverleaf Solanum elaeagnifolium perennial Solanaceae
Rate: 2.0-3.0 oz product/a

Common Name: oxtongue, bristly Picris echioides biennial Asteraceae
Rate: 2.5-3.0 oz product/a

Common Name: parsnip, Wild Pastinaca sativa biennial Apiaceae
Rate: 2.0-3.0 oz product/a

Common Name: partridgepea Chamaecrista fasciculata annual Fabaceae
Rate: 2.5-3.0 oz product/a

Common Name: pea, Swainson Sphaerophysa salsula perennial Fabaceae
Rate: 2.0-3.0 oz product/a

Common Name: pepperweed, perennial‡ Lepidium latifolium perennial Brassicaceae
Rate: 3.3 oz product/a

Common Name: pigweeds Amaranthus spp annual Amaranthaceae
Rate: 1.5-2.0 oz product/a

Common Name: plantain, broadleaf Plantago major perennial Plantaginaceae
Rate: 2.0-2.5 oz product/a

Common Name: plantain, buckhorn Plantago lanceolata perennial Plantaginaceae
Rate: 2.0-2.5 oz product/a

Common Name: povertyweed Iva axillaris perennial Asteraceae
Rate: 2.0-3.0 oz product/a

Common Name: purslane, common Portulaca oleracea annual Portulacaceae
Rate: 1.5-2.0 oz product/a

Common Name: ragweed, common Ambrosia artemisiifolia annual Asteraceae
Rate: 2.0-2.5 oz product/a

Common Name: ragweed, western* Ambrosia psilostachya perennial Asteraceae
Rate: 2.0-2.5 oz product/a

Common Name: ragwort, tansy Senecio jacobaea perennial Asteraceae
Rate: 2.5-3.0 oz product/a

Common Name: rush skeletonweed Chondrilla juncea perennial Asteraceae
Rate: 2.5-3.0 oz product/a

Common Name: salsify, Western‡ Tragopogon dubius biennial Asteraceae
Rate: 3.0-3.3 oz product/a

Common Name: shephardspurse Capsella bursa-pastoris Winter annual Brassicaceae
Rate: 1.5-2.0 oz product/a

Common Name: sicklepod Senna obtusifolia annual Fabaceae
Rate: 2.5-3.0 oz product/a

Common Name: sida, arrowleaf Sida rhombifolia annual Malvaceae
Rate: 2-2.5 oz product/a

Common Name: smartweed, Pennsylvania Polygonum pensylvanicum annual Polygonaceae
Rate: 1.5-2.0 oz product/a

Common Name: snakeweed, broom* Gutierrezia sarothrae perennial Asteraceae
Rate: 3.0 oz product/a

Common Name: sneezeweed, bitter Helenium amarum annual Asteraceae
Rate: 1.0-1.5 oz product/a

Common Name: snow-on-the-mountain Euphorbia marginata annual Euphorbiaceae
Rate: 2.0-2.5 oz product/a

Common Name: soda apple, tropical* Solanum viarum perennial Solanaceae
Rate: 2.5-3.0 oz product/a

Common Name: sorrel, red Rumex acetosella perennial Polygonaceae
Rate: 2.0-2.5 oz product/a

Common Name: sowthistle, annual Sonchus oleraceae annual Asteraceae
Rate: 2.5-3.0 oz product/a

Common Name: sowthistle, perennial Sonchus arvensis perennial Asteraceae
Rate: 2.0-2.5 oz product/a

Common Name: sowthistle, prickly Sonchus asper annual Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: spurge, spotted Euphorbia maculata Perennial Euphorbiaceae
Rate: 1.5-2.5 oz product/a

Common Name: St. Johnswort, common Hypericum perforatum perennial Clusiaceae
Rate: 2.5-3.0 oz product/a

Common Name: starthirstle, purple* Centaurea calcitrapa biennial Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: star-thistle, Malta* Centaurea melitensis annual Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: starthistle, yellow* Centaurea solstitialis annual Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: sunflower, common Helianthus annua annual Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: tansy, common Tanacetum vulgare perennial Asteraceae
Rate: 2.5-3.3 oz product/a

Common Name: teasel Dipsacus spp. biennial Dipsacaceae
Rate: 2.0-3.0 oz product/a

Common Name: thistle, Russian* Salsola iberica annual Chenopodiaceae
Rate: 1.5-2.0 oz product/a

Common Name: thistle, artichoke Cynara cardunculus perennial Asteracea
Rate: 2.0-3.0 oz product/a

Common Name: thistle, blessed milk Silybum marianum Biennial Asteraceae
Rate: 2.0-3.0 oz product/a

Common Name: thistle, bull* Cirsium vulgare biennial Asteraceae
Rate: 1.0-2.5 oz product/a

Common Name: thistle, Canada* Cirsium arvense perennial Asteraceae
Rate: 2.0-3.3 oz product/a

Common Name: thistle, Italian Carduus pycnocephalus annual Asteraceae
Rate: 2.0-3.0 oz product/a

Common Name: thistle, musk* Carduus nutans biennial Asteraceae
Rate: 1.0-2.5 oz product/a

Common Name: thistle, plumeless* Carduus acanthoides biennial Asteraceae
Rate: 1.0-2.5 oz product/a

Common Name: thistle, scotch Onopordum acanthium biennial Asteraceae
Rate: 1.5-2.5 oz product/a

Common Name: thistle, woolly distaff Carthamus lanatus annual Asteraceae
Rate: 1.5-2.0 oz product/a

Common Name: vervain‡ Verbena spp. perennial Asteraceae
Rate: 2.0-2.5 oz product/a

Common Name: vetch, common* Vicia sativa annual Fabaceae
Rate: 1.5-2.0 oz product/a

Common Name: wallflower, bushy Erysimum repandum annual Brassicaceae
Rate: 1.5-2.0 oz product/a

Common Name: waterpod Ellisia nyctelea annual Brassicaceae
Rate: 1.5-2.0 oz product/a

Common Name: whitetop (hoary cress)* Cardaria draba perennial Brassicaceae
Rate: 3.3 oz product/a

Common Name: woodsorrel, yellow Oxalis stricta perennial Oxalidaceae
Rate: 3.0-3.3 oz product/a

Common Name: wormwood, absinth* Artemisia absinthium perennial Asteraceae
Rate: 3.0-3.3 oz product/a

Common Name: yankeeweed Eupatorium compositifolium perennial Asteraceae
Rate: 3.0-3.3 oz product/a

Common Name: yarrow, common Achillea millefolium perennial Asteraceae
Rate: 1.5-2.0 oz product/a

Hawkweed, orange or yellow:
Apply Chaparral at 2.5 to 3.3 ounce/acre to plants in the bolting stage of development.
Houndstongue:
Apply 2.5 ounce/acre to rosettes. As plant bolts, increase the rate to 3.0 to 3.3 ounce/acre up to early bud stage. Add 1 quart of 2,4-D/acre after the bud stage.
Ironweed, Western:
Apply Chaparral at 2.5 to 3.0 ounce/acre when plants are in the vegetative growth stage. The addition of 0.5 to 1 lb ae/acre (1 to 2 pints/acre of 4 lb ae/gallon 2,4-D) of 2,4-D/acre will improve control in dense stands or when ironweed is greater than 6 inches.
Knapweeds, diffuse and spotted: Apply Chaparral at 2.5 to 3.3 ounce/acre when plants are actively growing with the optimum time of application occurring from rosette to the bolting stages of development or in the fall. Plants will be controlled by mid-summer and fall applications even though plants may not show any changes in form or stature the year of application.
Knapweed, Russian:
Apply Chaparral at 2.5 to 3.3 ounce/acre to plants in the spring and summer to plants from early bud to flowering stage and to dormant plants in the fall.
Lespedeza, Sericea: Apply 2.5 to 3.0 ounce/acre beginning at flower bud initiation through the full bloom stage of growth.
Mullein: Apply 2.0 ounce/acre in the rosette stage in spring or fall. Use rates from 2.5 to 3.3 ounce/acre for bolting plants less than 12 inches tall. Oxeye daisy: Apply Chaparral at 2.5 to 3.3 ounce/acre to plants in the prebud stage of development.
Pepperweed, perennial:
Apply Chaparral at 3.3 ounce/acre plus 2 lb ae/a 2, 4-D when plants are at early flowering through bloom for optimum control.
Ragweed, Western:
Apply Chaparral at 2.0 to 2.5 ounce/acre when plants are in the vegetative growth stage. The addition of 0.5 to 1 lb ae/acre (1 to 2 pints/acre of 4 lb ae/gallon 2,4-D) of 2,4-D/acre will improve control in dense stands or when ragweed is greater than 6 inches.
Russian thistle, kochia, and prickly lettuce:
Naturally occurring resistant biotypes of these weeds to metsulfuron are known to occur. For best results, use Chaparral at 1.5 to 2.0 ounces/acre in tank-mix with 2,4-D. Applications to these weeds should be made early to weeds less than 6 inches in height.
Snakeweed, broom:
Applications should be made in the fall at 3.0 ounces/acre. Spring applications will provide suppression only.
Soda apple, tropical:
Apply Chaparral at 2.5 to 3.0 ounce/acre at any growth stage, but application by flowering will reduce seed production potential.
Starthistle, malta, purple, and yellow:
Apply Chaparral at 1.5 to 2.0 ounce/acre to plants at the rosette through bolting growth stages.
Sulfur cinquefoil:
Apply Chaparral at 2.0 to 2.5 ounce/acre to plants in the prebud stage of development.
Thistle, Canada:
Apply Chaparral at 2.0 to 3.3 ounce/acre either in the spring after all plants have fully emerged (some may be budding) or until the oldest plants are in full flower stage. Use the higher rate when applying to the flower stage. Applications are also effective in the fall before a killing frost. Use higher rates for older/dense stands or for longer residual control.
Thistles, Bull, musk, and plumeless:
Apply Chaparral at 1.0 to 2.0 ounce/acre in the spring and early summer to rosette or bolting plants or in the fall to seedlings and rosettes. Apply at 2.0 to 2.5 ounce/acre plus 0.5 lb ae/acre 2,4-D when plants are at the late bolt through early flowering growth stages.
Vervain:
Chaparral alone will provide suppression. Apply 1.5 to 2.0 oz/acre of Chaparral with 0.5 lb ae/acre (1 pint/acre of 4 lb ae/gallon 2,4-D) of 2,4-D.
Whitetop:
Apply 3.3 ounce/acre early in the spring to actively growing rosettes or to regrowth before the bud stage. Treatment after bloom is generally less effective and the addition of 2,4- D at 1 lb ae/acre (2 pint/acre of 4 lb ae/gallon 2,4-D) is recommended.
Wormwood, absinth:
Apply 3.0 to 3.3 ounce/acre before wormwood is 12 inches tall. When applying by air on CRP, coverage is important and a minimum of 3 GPA is specified. Remove old duff and litter by fire or mowing for best results. Fall applications are also effective if green regrowth is present.

Woody Plant Control:
Common Name: blackberry
Rate: 3.0 oz product/a
Application Details: Apply when leaves are fully expanded and the plant has stopped rapid spring and early summer growth. Application after bloom and before frost is optimal. It is recommend that after mowing, shredding, or burning applications should wait until the next season and enough re-growth has occurred for good uptake and translocation.

Common Name: buckbrush (coralberry) or Western snowberry
Rate: 3.0 oz product/a
Application Details: Apply 3 oz/acre of Chaparral alone or 2.0 to 3.0 oz/acre with 1 lb ae/acre of 2,4-D ester (2 pints/acre of 4 lb ae/gallon 2,4-D) in the spring when leaves are fully expanded and foliage is mature. Apply 3 oz/acre with 1 lb ae/acre of 2,4-D ester (2 pints/acre of 4 lb ae/gallon 2,4-D) from full leaf expansion up to the flowering stage.

Common Name: dewberry
Rate: 3.0 oz product/a
Application Details: Apply when leaves are fully expanded and the foliage is dark green, either before first flower or after fruit drop. Application after fruit drop is preferred until frost. It is recommend that after mowing, shredding, or burning applications should wait until the next season and enough re-growth has occurred for good uptake and translocation..

Common Name: honey
Rate: 3.0 oz product/a
Application Details: Apply in spring when leaves are fully expanded and foliage is mature.

Common Name: honeysuckle
Rate: 3.0 oz product/a
Application Details: Apply in spring when leaves are fully expanded and foliage is mature

Common Name: kudzu
Rate: 3.0 oz product/a
Application Details: Apply at or after bloom (July) in the summer until fall when the foliage begins to senesce. Kudzu should be actively growing; avoid treating when drought stressed.

Common Name: locust, black
Rate: 3.0 oz product/a
Application Details: Apply in spring when leaves are fully expanded and foliage is mature.

Common Name: mimosa
Rate: 3.0 oz product/a
Application Details: Apply after full leaf emergence in the spring until fall foliage color change.

Common Name: plum, American and sand hill
Rate: 3.0 oz product/a
Application Details: Apply in spring when leaves are fully expanded and foliage is mature

Common Name: redbud
Rate: 3.0 oz product/a
Application Details: Apply after full leaf emergence in the spring until fall foliage color change.

Common Name: rose, Cherokee
Rate: 3.0 oz product/a
Application Details: Apply from full leaf through flowering. For best results, delay treatment for 9-12 months after mowing.

Common Name: rose, multiflora
Rate: 3.0 oz product/a
Application Details: Apply from full leaf through flowering. For best results, delay treatment for 9-12 months after mowing.

Common Name: rose, prairie wild
Rate: 3.0 oz product/a
Application Details: Apply from full leaf through flowering. For best results, delay treatment for 9-12 months after mowing.

Common Name: Tree of heaven
Rate: 3.0 oz product/a
Application Details: Apply after full leaf out and before fall foliage color change

Common Name: wisteria
Rate: 3.0 oz product/a
Application Details: Apply after full leaf emergence in the spring until fall foliage color change.

Common Name: yucca
Rate: 3.0 oz product/a
Application Details: Add 1 lb ai/acre of 2,4-D ester (2 pints/acre of 4 lb ae/gallon 2,4-D) to Chaparral at 3.3 ounce/acre. Another option for additional woody plant control is Chaparall plus 1 pint/acre Remedy® Ultra. Make applications from flower stalk elongation through seed pod development. Crop oil concentrate (COC), Methylated Seed Oil (MSO) or Methylated Seed Oil/ Organosilicone (MSO/OS) are the preferred adjuvants. Aerial application is recommended with a minimum of 4 gallons per acre volume for dense yucca populations.

CropsBBCHRegistred normPreharvest Interval
Grassland0 - 01 - 3.3-

Effective