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Herbicide Mixtures for Weeds in Turf
TURFGRASS—Mixtures without Triclopyr • carfentrazone-ethyl + MCPA + MCPP + dicamba (Power Zone)
Rate See label
Time
Apply to actively growing broadleaf weeds.
Remarks
Power Zone is an emulsifiable concentrate. Power Zone is a selective postemergence herbicide with superior cool-weather performance on established cool- and warm-season grasses for common and troublesome weeds in turfgrass such as spurge, pennywort, dandelion, and white clover. Evidence of injury can be seen within hours of application, and plants can die in 7 to 14 days. Safe on Kentucky bluegrass, annual bluegrass, annual ryegrass, perennial ryegrass, tall fescue, red or fineleaf fescue, and mixtures of cool-season species in noncropland (Kentucky bluegrass, tall fescue, smooth bromegrass, and orchardgrass). Uses include institutional, ornamental, and residential sites, sod production, and noncropland (rights-of-way, roadsides, medians, airports, and military installations). Spray solution must be above pH 5 and below pH 8.
Caution
Tolerance to Power Zone may vary; certain F1 hybrids of bermudagrass may yellow temporarily. Environmental conditions and certain spray tank additives (e.g., adjuvants, wetting agents, surfactants), liquid fertilizers, and tank-mixtures containing other emulsifiable concentrates may reduce selectivity on turfgrass. Do not apply to bentgrass greens, carpetgrass, dichondra, legumes, or lawns with desirable clovers. Do not apply to new grass seedlings until after the second mowing. Wait 3 to 4 wk to apply to newly sodded, sprigged, or plugged areas. Do not irrigate turfgrass within 24 hr after applying. Delay mowing 1 to 2 days before and after applying this product. Treated areas may be reseeded 2 wk after application. Do not apply when air exceeds 90°F. Do not apply to any body of water, wetlands, irrigation ditch banks, or shorelines.
Site of action
(carfentrazone-ethyl) Group 14: protoporphyrinogen oxidase inhibitor; (MCPA, MCPP, and dicamba) Group 4: synthetic auxin
Chemical family
(carfentrazone-ethyl) triazinone;
(MCPA and MCPP) phenoxy acetic acid; (dicamba) benzoic acid
• carfentrazone-ethyl + 2,4-D + MCPP + dicamba (Speed Zone)
Rate See label
Time
Apply to actively growing broadleaf weeds.
Remarks
Speed Zone is an emulsifiable concentrate. Speed Zone is a selective postemergence herbicide with superior cool-weather performance on established cool- and warm-season grasses for common and troublesome weeds in turfgrass such as spurge, pennywort, dandelion, and white clover. Evidence of injury can be seen within hours of application, and plants can die in 7 to 14 days. Safe to apply on Kentucky bluegrass, annual bluegrass, perennial ryegrass, tall fescue, red or fineleaf fescue, creeping and colonial bentgrass (excluding golf greens), and mixtures of cool-season species in noncropland (Kentucky bluegrass, tall fescue, smooth bromegrass, and orchardgrass). Uses include institutional, ornamental, and residential sites, sod production, and noncropland (rights-of-way, roadsides, medians, airports, and military installations). Spray solution must be above pH 5 and below pH 8.
Caution
Do not apply to bentgrass greens, carpetgrass, dichondra, legumes, and lawns with desirable clovers. Do not apply to new grass seedlings until after the second mowing. Delay applying for 3 to 4 wk on newly sodded, sprigged, or plugged areas. Do not irrigate turfgrass within 24 hr after application. Delay mowing 1 to 2 days before and after application. Treated areas may be reseeded 2 wk after application. Do not apply when air exceeds 90°F. Do not apply to any body of water, wetlands, irrigation ditch banks, or shorelines.
Site of action
(carfentrazone-ethyl) Group 14: protoporphyrinogen oxidase inhibitor; (2,4-D, MCPP, and dicamba) Group 4: synthetic auxin
Chemical family
(carfentrazone-ethyl) triazinone; (2,4-D and MCPP)
phenoxy acetic acid; (dicamba) benzoic acid
• 2,4-D + fluroxypyr + dicamba (Escalade or Escalade Low Odor)
Rate See label
Time
Apply to actively growing broadleaf weeds listed on label.
Remarks
Escalade is formulated to control weeds growing in Kentucky bluegrass, fescue, perennial ryegrass and bentgrass turf (excluding golf greens and tees). Used to control black medic, chickweed, clover, cocklebur, dandelion, knotweed,
Oxalis
species, plantain, thistle, and many other species of broadleaf weeds listed on the label. For turf, do not exceed two broadcast applications per year.
Caution
Do not apply to golf greens and tees, centipedegrass, St. Augustinegrass, dichondra, legumes, and lawns with desirable clovers. Avoid contact with exposed feeder roots of ornamental trees and shrubs. Avoid applying during excessively dry or hot periods unless irrigating. Do not apply to new grass seedlings until after second mowing. Wait 3 to 4 wk to apply to newly sodded, sprigged, or plugged areas. Do not irrigate turfgrass within 24 hr after application. Delay mowing 1 to 2 days before and after applying. Do not apply when air exceeds 90 F. Do not allow people (other than applicator) or pets on treatment area during application. Do not enter treatment area until spray has dried. Do not reseed for 3 to 4 wk after applying. Product can be mixed with some liquid fertilizers or liquid iron materials; however, test for compatibility before mixing in application equipment, due to product variability.
Site of action
(all) Group 4: synthetic auxin
Chemical family
(2,4-D) phenoxy acetic acid; (fluroxypyr) pyridine; (dicamba) benzoic acid
• 2,4-D + quinclorac + dicamba (Quincept)
Rate See label
Time
Apply to actively growing grassy and broadleaf weeds listed on label.
Remarks
Provides broad-spectrum control of grassy and broadleaf weeds in residential and nonresidential turfgrasses. Sites include but are not limited to grounds or lawns around residential and commercial establishments, multifamily dwellings, military and other institutions, parks, airports, roadsides, schools, picnic grounds, athletic fields, houses of worship, cemeteries, golf courses, and sod farms. Controls newly germinated one- to two-leaf crabgrass, to one-tiller crabgrass when crabgrass has matured to five tillers or greater. Quinclorac contributes grassy weed control and is absorbed by foliage and roots and translocated throughout the plant. Susceptible grasses demonstrate stunting, chlorosis, and gradual reddening followed by necrosis and death. Yellowing that may occur on some grasses may be reduced by adding chelated iron or sprayable solution nitrogen. Apply to fine fescue only when it is part of a blend.
Caution
Do not apply to newly seeded grass until after the third mowing or 4 wk after emergence. Do not mow for 2 days before or after applying. Do not apply by air or through any type of irrigation system. Application to established creeping bentgrass must be in two to three split applications. Do not exceed 1.5 lb ai/A quinclorac per year. Do NOT use on golf course greens, tees, or collars. Do NOT use on lawns with desirable clovers or legumes.
Site of action
(all) Group 4: synthetic auxin;
Chemical family
(2,4-D) phenoxy acetic acid; (quinclorac) quinoline carboxylic acid; (dicamba) benzoic acid
• 2,4-D + 2,4-DP (many products) or
• 2,4-D + MCPP + dicamba or
• 2,4-D + MCPP-P + dicamba (Trupower 3) or
• 2,4-D + 2,4-DP + dicamba or
• MCPA + MCPP + dicamba or
• 2,4-D + 2,4-DP + MCPP (Spoiler)
Rate See labels
Time
Apply to actively growing broadleaf weeds listed on label.
Remarks
These mixtures are available in amine salt and ester formulations. They generally are effective on a broad range of weeds and are safe on most grasses due to relatively low component rates. As a group, these will not control
Oxalis
species, violets, lawn ivy, or spurge. Retreatment generally is necessary on difficult weeds such as yarrow, lawn daisy, and clovers.
Site of action
(all) Group 4: synthetic auxin
Chemical family
(2,4-D, 2,4-DP, MCPP, and MCPA) phenoxy acetic acid; (dicamba) benzoic acid
• MCPA + fluroxypyr + dicamba (Triple Shot)
Rate See label
Time
Apply to actively growing broadleaf weeds listed on label.
Remarks
This product is for selective broadleaf weed control in ornamental lawns, parks, cemeteries, athletic fields, golf courses (excluding any bentgrass tees) and sod farms.
Caution
Do not use on Dichondra, or on lawns with desirable clovers. Avoid fine mists. Use lawn-type sprayer with coarse spray so wind drift is less likely. Avoid contact with exposed feeder roots of ornamentals and trees. Best control is from spring or early fall applications, when weeds are actively growing. Use higher rate on label for hard-to-control weeds. Do not apply to newly seeded grasses until well established. Avoid broadcast applications when air exceeds 90°F. Spot treatments at temperatures over 90°F may injure turf. Do not mow turfgrass 1 to 2 days before or after application. Wait 3 or 4 wk after application to reseed.
Site of action
(all) Group 4: synthetic auxin;
Chemical family
(MCPA) phenoxy acetic acid; (fluroxypyr) pyridine; (dicamba) benzoic acid
TURFGRASS—Mixtures with Triclopyr • 2,4-D + triclopyr (Turflon D, Chaser, or Turflon II Amine) or
• clopyralid + triclopyr (Confront)
Rate See label
Time
Apply to actively growing broadleaf weeds listed on label.
Remarks
The 2,4-D + triclopyr mixture is available in amine salt and ester formulations; the clopyralid + triclopyr mixture is available only as an amine salt. Both mixtures control a wide range of common weeds and are active on
Oxalis
species
,
lawn violets, lawn ivy, and spurge. Confront is weak on mouseear chickweed. Confront is for use on nonresidential turf such as athletic and recreational sports fields, cemeteries, golf courses, industrial sites, military bases, noncropland, parks, rights-of-way, schools, and other nonresidential turf roadsides.
Caution A restricted-use pesticide in Washington and Oregon, for use on golf courses only.
Mixtures with triclopyr ester may injure fine fescues and other sensitive grasses particularly in early spring. Damage to
Deodara
cedar has been associated with mixtures containing triclopyr ester applied in spring around bud break. Use Confront only on tall fescue, bluegrass (turf), or perennial ryegrass unless injury to other species can be tolerated. Do not use Confront on residential turf. Do not send clippings to a compost facility. Do not collect grass clippings for mulch or compost. Applicators must tell landowners and managers
not
to use grass clippings for composting.
Site of action
(all) Group 4: synthetic auxin
Chemical family
(2,4-D) phenoxy acetic acid; (triclopyr and clopyralid) pyridine
TURFGRASS—Lawn Moss • carfentrazone-ethyl (QuickSilver T&O Herbicide)
Rate See supplemental label
Time
During daylight, apply to moss in turfgrasses listed on label.
Remarks
QuickSilver T&O Herbicide is a contact herbicide with little or no residual activity that provides selective postemergence control of broadleaf weeds and silvery thread moss
(Bryum argenteum)
in turfgrass. It is an aryl triazolinone herbicide, which interrupts chlorophyll synthesis and produces metabolic byproducts that disrupt plant cell membranes. This process occurs only in susceptible green plants in the presence of light. Symptoms may appear on foliage in 24 hr or less in susceptible plants. Complete desiccation and death occur 7 to 14 days after application. QuickSilver is rainfast within 1 hr after application. Established cool-season grasses generally tolerate applications at labeled rates. Tall fescue may yellow slightly within 3 to 5 days after application under some conditions. Recovery typically is within 4 to 7 days. If such injury cannot be tolerated, apply to a small test area before treating a large area.
QuickSilver produces herbicidal symptoms only in the weed parts it contacts directly. For best results, select a spray volume and nozzle system that ensure thorough, uniform coverage and minimize fine spray droplets. Spray droplets larger than 400 microns may reduce coverage and reduce weed control. Apply in spray volumes of 20 to 175 gal/A (0.5 to 4 gal/100 sq ft). Use higher spray volumes on dense weed populations, turfgrass canopies, or where uniform coverage is difficult to obtain.
QuickSilver can be applied at 7 days or more after emergence to creeping bentgrass, tall fescue, perennial ryegrass, and Kentucky bluegrass.
Caution
Do not apply to carpetgrass or dichondra or to lawns or turf with desirable clovers. Avoid spray drift to nontarget, desirable, susceptible plants such as vegetables, flowers, ornamentals, trees, and shrubs. Do not apply when conditions favor spray drift or poor spray coverage. Do not exceed 6.7 fl oz/A (0.1 lb ai/A) per application or 0.4 lb ai/A per season. Allow at least 2 wk between sequential broadcast applications. Do not apply by air or through any type of irrigation system. Quicksilver can be tank-mixed with other products, but observe all label restrictions on turf tolerance of companion products. Maintain spray solution between pH 5 and pH 8.
Site of action
Group 14: protoporphyrinogen oxidase inhibitor
Chemical family
Triazinone
• ferrous sulfate
Rate 0.5 to 1.5 lb product per 1,000 sq ft; see label
Time
Apply to moss in early spring and fall when grass is actively growing and will fill in the bare areas after moss dies.
Remarks
Iron compounds act as contact herbicides and are available in granular and liquid formulations. Treatments are effective whenever moss is actively growing. For detailed information on moss control, refer to Oregon State University Extension publication FS 55,
Controlling Moss in Lawns
, online at http://extension.oregonstate.edu/catalog/html/fs/fs55/
Caution
Iron stains concrete and painted surfaces. Keep sprays away from these surfaces. Turf may be temporarily discolored (blackened) at high application rates.
• potassium salts of fatty acids (Moss Max)
Rate See label
Time
Apply to moss in early spring and fall when grass is actively growing and will fill in the bare areas after moss dies.
Remarks
Potassium salts of fatty acids act as contact herbicides and are available as liquid concentrates. Treatments are effective whenever moss is actively growing. For details on moss control, refer to Oregon State University Extension publication FS 55,
Controlling Moss in Lawns
, online at http://extension.oregonstate.edu/catalog/html/fs/fs55/
Caution
May temporarily discolor treated grasses. Product is safe on concrete and other surfaces.
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