Spectracide® Weed Stop® For Lawns Plus Crabgrass Killer Concentrate QuickFlip Hose-End Sprayer

Use Spectracide Weed Stop For Lawns Plus Crabgrass Killer Concentrate (Ready-to-Spray) to kill over 470 types of weeds as listed, including crabgrass. The product produces visible results in 5 hours. This product kills broadleaf and troublesome grass weeds including dandelion, chickweed and clover as well as crabgrass, foxtail and yellow nutsedge, see product label for complete list of weed types. Apply when daytime temperatures are between 45°F and 90°F. Do not apply to Bermudagrass when daytime temperatures exceed 85°F.

  • Kills yellow nutsedge
  • See results in 5 hours
  • Kills over 470 weed types as listed, including crabgrass
  • Won't harm lawns when used as directed
  • Treats up to 5,000 square feet

Active Ingredients

2,4-D, dimethylamine salt 3.74%
Quinclorac 1.79%
Dicamba, dimethylamine salt 0.43%
Sulfentrazone 0.22%
Other Ingredients 93.82%
Total 100.00%
0.264 lb. 2,4-dichlorophenoxyacetic acid equivalent per gallon or 3.11%
0.152 lb. 3,7-dichloro-8-quinolinecarboxylic acid per gallon or 1.79%
0.030 lb. 3,6-dichloro-o-anisic acid equivalent per gallon or 0.36%
0.019 lb. N-[2,4-dichloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]phenyl]methanesulfonamide per gallon or 0.22%
Isomer Specific by AOAC Method.
  • 32 fl oz
Alder, Alfalfa (Lucerne), Alpine aster, Alsike Clover, alyce clover, American black elderberry, American elm (White elm), American hazel, American persimmon (Common persimmon), American speedwell (American brooklime), American yellowrocket, amur honeysuckle, Annual knawel (German knotweed), Annual nettle (Dwarf nettle), Annual rape (Wild rape), Annual Sowthistle (common sowthistle, milk sowthistle), Annual trampweed, Annual wild geranium (Spotted geranium, wood geranium, Cranesbill), annual yellow sweet clover, arkansas rose, Artichoke thistle, asiatic pennywort, Asiatic witchweed, Atlantic white cedar (Southern white cedar), Austrian fieldcress, Ball Mustard, Bedstraw, Beggarweed (Creeping beggarweed), big leaf maple, Bigroot Morningglory, Bigtooth aspen (American aspen, White poplar), Bi-lobed Speedwell (Twolobe speedwell), bindweed (wild morningglory), Bird vetch, bitter sneezeweed, Bitterweed, Black bent (Redtop), Black birch (River birch, Water birch), Black cherry, black cottonwood, Black medick, Black mustard, black willow, Blackberry, Blackberry elder, Black-eyed Susan, Blackseed plantain, Blessed thistle, Bloodflower (Tropical milkweed, Mexican butterfly weed), Blue ash, Blue elderberry, Blue lettuce, Blue Mustard, blue toadflax, Blue vervain, Blue woodsorrel, Blunt-leaved milkweed (Clasping milkweed), box elder, Bracted plantain, Brambles, Brass buttons, Brazil Pusley, brazilian pepper, Bristly Mallow, Bristly oxtongue, Broadleaf knotweed, Broad-leaved dock, Broomweed, buckwheat, Bulbous buttercup, Bull mallow (French mallow), bull nettle, bull thistle, Bur oak, burclover, Burning nettle (Stinging nettle), bushy aster, bushy buttonweed, Buttonweed (Rough buttonweed, Poorjoe), California knotweed, california rose, California wild grape, Canada thistle, Carolina geranium (wild), Carpetweed, catchweed, Catchweed bedstraw, Catnip, Catsear (catsear dandelion, false dandelion, spotted and common catsear), Chamber bitter, chamise, Chickweed (Common chickweed), Chicory, Chinese yarrow (Siberian yarrow), Chinkapin oak, choke cherry, coffeebean, coffeeweed (Colorado River-hemp), common burdock, Common cinquefoil (Oldfield cinquefoil), Common cocklebur (Rough cocklebur, Large cocklebur), Common Dandelion, common groundsel, Common hawkweed (Yellow hawkweed), Common hawthorn, Common honeysuckle (Woodbine), Common iceplant, common knapweed, Common knotgrass (Knotweed), Common Lespedeza, Common lupine, Common mallow (Alkali mallow, buttonweed, cheeseweed, dwarf mallow), common mullein, Common primrose (English primrose), Common Purslane, common ragweed, Common salsify (Goatsbeard), Common snowberry, Common Speedwell, Common sunflower, common tarweed, Common thistle (Bull thistle), Common yellow woodsorrel (Yellow woodsorrel, Common yellow oxalis), coral bead, corn chamomile, Corn Speedwell, Corn spurry, coyote brush, Creeping Buttercup, Creeping Woodsorrel, Crimson Clover, Cudweed (Purple cudweed), Cupid shaving brush, Curly dock (Curled dock, Yellow dock, Sour dock), Curly indigo (Sensitive jointvetch), Curlycup gumweed, cutleaf evening primrose, Daisy Fleabane (annual), Dayflower, dead nettle, Desert wild grape, Dewberry (Garden dewberry), Dichondra (Carolina ponysfoot), distaff thistle, Dogbane, Dogfennel, Dollarweed (Manyflower marshpennywort), Doveweed, drummonds thistle, elk thistle, English Daisy, Eucalyptus (Bluegum, Tasmanian bluegum, Southern blue-gum), evergreen blackberry, fall dandelion, false flax, False sunflower, fennel, Field bindweed (*morningglory & creeping jenny), Field burrweed (lawn burrweed, common soliva, spurweed), Field horsetail (Common horsetail, Mare's tail), Field mouse-ear (Field chickweed), Field oxeye-daisy (creeping oxeye, oxeye daisy), field pansy, field pennycress (French weed), Field pepperweed (Field pepperwort), field violet, Flatwoods plum (Sloe plum), flix weed, Flodman Thistle (prairie), Florida Betony, florida prickly blackberry, Florida pusley, florida yellow woodsorrel, french broom, garden spurge, Garden star-of-Bethlehem (Grass lady), garlic mustard, giant ironweed, giant ragweed, Gooseberry, Gray chickweed (Gray mouse-ear chickweed), gray thistle, great burdock, great ironweed, Great yellow woodsorrel, Ground ivy (Creeping Charlie, Creeping Jenny), Groundsel, Hackberry, Hairy Beggarticks, Hairy Bittercress, hairy buttercup, Hairy fleabane, Hairy Galinsoga, Hairy Vetch (Fodder vetch, Winter vetch), Hairy-pitted stork's bill, Healall, Heartleaf drymary, Heartleaf nettle, Heath Aster (White Heath Aster), Hedge mustard, Hemp, hemp sesbania, henbit, himalayan blackberry, Hoary cress, Hoary plantain, Hoary vervain, Hop Clover, horsenettle, horseradish, horseweed/marestail, Illinois woodsorrel, Indian Mock Strawberry, Indian Mustard, Innocence (Blue-eyed Mary), italian thistle, Ivyleaf Morningglory, Ivyleaf Speedwell, Japanese honeysuckle, Jewel milkweed (Pallid milkweed), jewelweed, Jimsonweed, Devil's Snare, Johnny-Jumpup violet, Kudzu, Ladysthumb Smartweed, Lamb's quarters (Goosefoot, Pigweed), lambsquarters, Lanceleaf Ragweed, lantana, Large Crabgrass (Hairy crabgrass), Large Flower Pusley, Late goldenrod (Canada goldenrod), Leafy spurge, leafy thistle, Lilac, little bittercress, Little evening primrose (Small sundrops), Little mallow (Least mallow), locust, London rocket, mackenize willow, madrone, Marcela, marshelder, Matchweed, mayweed (stinking chamomile), Meadow Hawkweed, meadow thistle, Mesquite (Honey mesquite), Mexican Morningglory, Mexicanweed (Mexican fireweed, Kochia), mimosa, Mock strawberry, Mojave stinkweed, Moneywort, Mountain bush honeysuckle, Mountain woodsorrel (Wood shamrock), Mouse-ear Chickweed , Mouseear hawkweed, Mugwort, Multiflora rose, Musk thistle, narrow leaved willow, narrowleaf cudweed, narrowleaf plantain (English plantain, buckhorn), nightshade (silverleaf), Northern Bedstraw, Northern bush honeysuckle, Northern pin oak, oakleaf fleabane, Old world diamond flower (Oldenlandia, Flattop Mille Graines), Orange hawkweed, Oriental cocklebur, Pale Smartweed, Parsley-piert (Slender parsely-piert), Parsnip (Wild parsnip), Pearlwort (Bird's-eye pearlwort), Pennsylvania cinquefoil (Prairie cinquefoil), Pennsylvania smartweed, Pepperweed (Perennial pepperweed), pigweed, Pin oak (Swamp Spanish oak), Pineappleweed, Pineywoods bedstraw (Wood bedstraw), plains coreopsis (tickseed), plantain (broadleaf plantain, greater plantain, common plantain), Platte Thistle, plumeless thistle, poison hemlock, Poison Ivy, Poison Oak, Poison Sumac, Pokeweed, Port Orford cedar (Lawson cypress), povertyweed, Prairie sunflower, Prickly lettuce (compass plant), Prickly sida, Prostrate knotweed, Prostrate pigweed, prostrate spurge, Prostrate Verbain, prostrate vervain, Puncture vine (Goat's-head), Purple Amaranth, Purple Aster, Purple cudweed (annual purple cudweed, perennial purple cudweed), purple deadnettle, Purple milkweed, Purple milvetch (Purple loco, Field milkvetch), Purple nutsedge (Purple nutgrass), Purslane Speedwell, quaking aspen, Rabbit Foot Clover, Raspberry (Wild black raspberry), Red alder, red clover, Red maple (Water maple, Soft maple), Red Morning glory, Red sorrel (Sheep's sorrel), redroot, Redroot Pigweed, Red-seeded Dandelion, Redstem filaree, Redweed, Redwood sorrel (Oregon oxalis), Rough cinquefoil, Rough fleabane, Rough horsetail (Scouringrush horsetail), Russian pigweed, Russian thistle, Sage, Sagebrush, salmonberry, saltcedar, Sassafras (White sassafras, Red sassafras, Silky sassafras), Scarlet pimpernel, scotch broom, Scotch thistle (Cotton thistle), scouler's willow, Shepherd’s purse, shiny cudweed, Shortawn foxtail (Orange foxtail), Shortstalk stinkweed, showy evening primrose, Showy goldenrod, Showy tick-trefoil (Canadian tick-trefoil, Canada tickclover), Silver ponysfoot (Silver nickel vine), Skunkbush sumac, Slender Amaranth, Slender Bush Clover (Slender lespedeza), Slender plantain, Slender Speedwell, Slender stinkweed, slender-flower thistle, smallflower buttercup, Smallflower galinsoga, Small-flowered winter-cress, Smooth Bedstraw (Crosswort), Smooth Beggarticks, smooth cat's ear, Smooth chaff-flower, Smooth Crabgrass, Smooth dock, smooth pigweed, sneezeweed, Snow Speedwell, Sorrel, Southern bush honeysuckle, Southern Crabgrass, Southern wild rose (Virginia rose, Common wild rose), Spanish needles, spatterdock, Spiny amaranth, Spiny cocklebur, Spiny sowthistle, spotted knapweed, Spotted locoweed (Freckled milkvetch), spotted spurge, sprawling horseweed, st. johnswort, Sticky Chickweed (Stick mouse-ear chickweed), Stiff goldenrod (stiff-leaved goldenrod), Strawberry Clover, swamp smartweed, Sweet goldenrod, Sweet gum (American sweetgum), swinecress, Tall Beggarticks, Tall milkweed (Poke milkweed), Tall Morning glory (Common morning-glory), Tall nettle, tall thistle, Tall vervain, Tanoak (Tanbark-oak), tansy mustard, tansy ragwort, Tanweed (Water knotweed, Water smartweed), teaweed, Texas filaree, thimbleberry, three flower beggarweed, Thymeleaf Speedwell, toadflax (common toadflax, yellow toadflax), Tooth-leaved croton (tropic croton, sand croton), trailing blackberry, trailing crownvetch, tree tobacco, Trumpet creeper (Trumpet vine, Cow itch vine, Hummingbird Vine), Tufted evening primrose (Fragrant evening primrose), tufted knotweed, tumble mustard, Tumble pigweed, velvetleaf, Venice mallow, Vetch (Common vetch, Garden vetch)), vine maple, Violet Woodsorrel, Virginia buttonweed, Virginia creeper, Virginia pepperweed (Peppergrass), Virginia winged rockcress, wandering cudweed, Water pennywort (Floating marshpennywort), Wavyleaf Thistle (Gray thistle), Western clematis, Western Ragweed, Western salsify (Goatsbeard), White ash (American ash), White Clover (*Dutch clover, honeysuckle clover, white trefoil, & purplewort), White mustard, White Prairie Aster, White Sweet Clover (White Melilot), Whitestem Filaree, whitetop, Wild Blackberry (Thornless blackberry), Wild buckwheat, wild carrot, Wild cherry, wild four-o'clock, Wild garlic (Wild onion), Wild honeysuckle (Tartarian honeysuckle), Wild lettuce, Wild marigold (Roundleaf marigold, Southern marigold), wild morningglory (hedge bindweed), Wild plum (American plum), Wild radish, wild rose (prickly wild rose)), Wild strawberry, Wild sweet potato, Wild vetch, Wild Violet, Willow-leafed poplar (Narrowleaf cottonwood), Winter speedwell (Persian speedwell), Wood Nettle, Woolly croton (Hogwort, Goatweed), Woolly morning glory, Woolly plantain, woollyleaf bursage, Wooly burdock (downy burdock), Wooly locoweed, Wormseed, Wormseed Mustard, Wreath goldenrod (Woodland goldenrod), Wrinkleleaf goldenrod (Rough-stemmed goldenrod), Yarrow (Common yarrow), Yellow birch (Golden birch), Yellow rocket (Winter cress, Bitter Wintercress, Wild Mustard), yellow starthistle, Yellow sundrops (Shrubby evening primrose), Yellow Sweet Clover (Yellow melilot, ribbed melilot, common mellilot), Yellow Thistle (horrible), Yellowflower pepperweed, yellowspine thistle. *annual or perennial
It is a violation of Federal law to use this product in a manner inconsistent with its labeling. For outdoor residential use only.

General Precautions and Restrictions

Do not apply this product in a way that will contact any person or pet, either directly or through drift. Keep people and pets out of the area during application. Do not allow people or pets to enter the treated area until sprays have dried. Do not exceed more than 0.375 lb Sulfentrazone/A per year. Do not treat when air temperatures exceed 90°F, as damage to grass may occur. Application at rates above specified on this label may cause injury to turfgrass. Do not apply this product to food crops (gardens and vegetables), forage crops, or ornamental plants including flowers, trees, shrubs, hedges, woody ornamentals, groundcovers established in landscape plantings and other non-target plants. Do not spray exposed roots of ornamentals and trees.
Do not use Spectracide® Weed Stop® For Lawns Plus Crabgrass Killer Concentrate on lawns containing bentgrass, St. Augustinegrass, bahiagrass, centipedegrass or carpetgrass. Also, do not use on dichondra, or lawns with desirable clovers or legumes. Do not use on vegetable gardens, fruits or ornamentals (flowers, trees, groundcovers, hedges, landscape/flower beds and shrubs).
This product is intended for use by homeowners on residential lawns. Only apply this product to the following species of turfgrass:
Cool season turfgrass: Kentucky bluegrass; perennial ryegrass; fescue spp., including tall, red and fine leaf fescues.
Warm season turfgrass: zoysiagrass**, Bermudagrass***, buffalograss
**Do not apply to zoysiagrass just emerging from dormancy, as it may result in lawn damage.
***Application to Bermudagrass may cause temporary yellowing or discoloration, but full recovery can be expected. Do not apply to Bermudagrass when daytime temperatures exceed 90°F.
Apply when daytime temperatures are between 45°F and 90°F.
SPRING: Spray when broadleaf weeds are young and actively growing with adequate soil moisture for best results.
FALL: Spray when broadleaf weeds are young and actively growing with adequate soil moisture for best results. Fall applications will control weeds that may otherwise go dormant through the winter and resprout the following spring. For heavy grass weed pressure, apply a second application at the same rate, 14 days after the first application.
CRABGRASS (LARGE AND SMOOTH): Spring and early summer: For the best results, apply this product from crabgrass emergence until the six-leaf stage (two tillers) or before the crabgrass is 3 to 4 inches tall. This period begins the first time that you can see crabgrass in your lawn. Use two applications at the same rate with a 14-day interval for dense populations.
Spring and early summer:
For the best results, apply this product to foxtail during the early growth stages or when foxtail is 1 to 4 inches tall. Use two applications at the same rate with a 14-day interval for dense populations.
Early summer:
Two applications of this product are required when the yellow nutsedge plants are 3 to 6 inches tall. Apply the second application at the same rate 14 days later.
Apply when dandelion, plantain, buttercup, speedwell, knotweed and other broadleaf weeds are young and actively growing with adequate soil moisture for best results.
Fall: Apply when henbit, chickweed, white clover, ground ivy, lawn burweed and other broadleaf weeds are young and actively growing with adequate soil moisture for best results.

Visual symptoms and time to kill will depend on weed type, temperature and application rate.
See the following table for calculating the correct amount of product to use for the area to be treated.
The maximum application rate is 6.5 fl oz of product per 1,000 sq ft per application (0.6 lb 2,4-D acid equivalent per acre per application). The maximum number of broadcast applications is limited to two per year.
The maximum seasonal rate is 13 fl oz of product per 1,000 sq ft (1.2 lb 2,4-D acid equivalent per acre), excluding spot treatments.

MEASUREMENT CALCULATIONS: Total lawn area in square feet = length x width.


  1. Shake container well before using.
  2. Connect a garden hose to the sprayer nozzle. Make sure switch is fully forward in the “OFF” position.
  3. Turn on water at faucet. Extend hose to the farthest area to be treated and work back toward the faucet so you don’t come in contact with the treated area.
  4. Remove safety tab from sprayer’s right side by pulling straight out. Keep for future reuse.
  5. To BEGIN spraying, point nozzle toward treatment site and pull switch backwards with thumb toward hose connection. Water will automatically mix with the product.
  6. Spray until wet to control weeds. Walk at a steady pace, working back toward the faucet while spraying, using an even sweeping motion, slightly overlapping treated areas. One quart will treat 5,000 sq ft of Southern or Northern grasses.
  7. To STOP spraying, push switch forward with thumb toward nozzle. Turn water off at faucet. To relieve pressure before removing nozzle from hose, pull switch backwards with thumb toward hose connection until water stops spraying.
  8. To STORE unused product, make sure switch is fully forward in the “OFF” position.
  9. Reinstall safety tab into sprayer’s right side. With sprayer in the full “OFF” position, push tab into position.
  10. Place in cool area away from heat, sunlight or open flame.
Turfgrass Total treated Area for
1 qt (32 fl oz) sprayer
Amount of herbicide applied
Per 1,000 sq ft
Kentucky bluegrass, fescue spp., perennial ryegrass, zoysiagrass**, bermudagrass*** and buffalograss 5,000 sq ft 6.4 fl oz

**Do not apply to zoysiagrass just emerging from dormancy, as it may result in lawn damage.
***Application to Bermudagrass may cause temporary yellowing or discoloration, but full recovery can be expected. Do not apply to Bermudagrass when daytime temperatures exceed 90°F.

  • Adequate moisture and mild environmental conditions enhance the performance of this product. Applications should be made to actively growing weeds. Apply when daytime temperatures are between 40°F and 90°F. Avoid applications of this product when turfgrasses are under stress since injury may result.
  • For newly seeded areas: Do not apply within four weeks after seedling emergence of Kentucky bluegrass, fine fescue blends and perennial ryegrass. Apply this product to newly seeded grasses when well-established (approximately six weeks after seedling emergence) or after the third mowing.
  • For newly sodded, sprigged or plugged areas: The application of this product to newly sodded, sprigged or plugged grasses should be delayed until three to four weeks after the sodding, sprigging or plugging operations.
  • Seeding: Turf species listed on this label can be seeded into the treated areas at four weeks after the application of this product.
  • Irrigation: Do not apply this product immediately before rainfall or irrigation. For best results, do not irrigate or water the turfgrass within 24 hours after application. If dry conditions exist, a scheduled irrigation or watering 24 hours before and 24 hours after application is recommended.
  • Mowing: Delay mowing two days before and until two days after the application of this product. Additional stress from low mowing heights may increase the possibility of turf injury. Clippings from the first three mowings should be left on the treated area. Do not use clippings from the treated areas as mulch or compost around flowers, ornamentals or trees in vegetable gardens.
Do not contaminate water, food or feed by storage and disposal.
Pesticide Storage: Store in a cool, dry area away from heat or open flame. Pesticide Disposal and Container Handling: Nonrefillable container. Do not reuse or refill this container. If empty: Place in trash or offer for recycling if available. If partly filled: Call your local solid waste agency for disposal instructions. Never place unused product down any indoor or outdoor drain.
Hazards to Humans and Domestic Animals
. Causes moderate eye irritation. Avoid contact with eyes or clothing. Harmful if swallowed. When using this product, wear long-sleeved shirt, long pants, socks, shoes and rubber gloves.
Wash thoroughly with soap and water after handling. After using this product, rinse gloves before removing, remove clothing and launder separately before reuse, and promptly and thoroughly wash hands and exposed skin with soap and water. Remove saturated clothing as soon as possible and shower.

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 five minutes, then continue rinsing eye.
  • 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 by a Poison Control Center or doctor.
  • Do not give anything 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 1-800-917-5438 for emergency medical treatment advice.

This pesticide is toxic to fish and aquatic invertebrates. Drift and runoff may be hazardous to aquatic organisms in water adjacent to treated areas. To protect the environment, do not allow pesticide to enter or run off into storm drains, drainage ditches, gutters or surface waters. Applying this product in calm weather when rain is not predicted for the next 24 hours will help to ensure that wind or rain does not blow or wash pesticide off the treatment area. Rinsing application equipment over the treated area will help avoid runoff to water bodies or drainage systems.

Do not use or store near heat or open flame.

To the extent required by applicable law, buyer assumes all responsibility for safety and use not in accordance with directions.

Questions & Comments? Call 1-800-917-5438 or visit our website at www.spectracide.com