Grassmaster Herbicide
Grassmaster Herbicide Grassmaster Herbicide

Grassmaster Herbicide

ALLIGARE

Grassmaster Herbicide

Grassmaster Herbicide is a combination herbicide containing two powerful active ingredients for removing a wide range of broadleaf weeds on agricultural lands. Formerly Dicamba Plus 2,4-D Herbicide - different name, same great product.

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Grassmaster Herbicide (formerly called Dicamba Plus 2,4-D Herbicide), manufactured by Alligare, is a selective post-emergent herbicide used for controlling a wide spectrum of annual, biennial, and perennial broadleaf weeds and brush in grass forages and agricultural settings.

This emulsifiable concentrate product is both easy to mix and use. Grassmaster Herbicide is quickly absorbed by plants through their roots and interferes with the plant's growth hormones, resulting in the death of many broadleaf weeds.

Grassmaster Herbicide effectively controls weeds like cocklebur or chickweed within 45 days of application. 

Tools Needed

Grassmaster Herbicide can be applied with a hand-held sprayer, backpack sprayer, or spray rig. We recommend using a spray rig for large-volume applications.

How to Use

Spraying selective herbicides

  • Step 1: Determine how much Grassmaster Herbicide you will need to use by measuring the square footage of the treatment area. To do this, measure the length and width of the treatment area in feet then multiply them together (length X width = square footage). For acreage, take the square footage and divide it by one acre (square footage / 43,560 sq. ft. = acres). The mixing rate will vary depending on the type of weed you are treating. For annual weeds, you will use anywhere between 0.5 and 4 pints of Grassmaster Herbicide per acre. For biennial and perennial weeds, you will use anywhere between 0.5 and 5 pints of product. Use between 5 and 40 gallons of water per acre for optimal application. Use the higher spray volume for dense or tall vegetation. For spot and small area applications, use 1 fluid ounce of product per gallon of water. 
  • Step 2: Once you have properly measured your area and determined how much Grassmaster Herbicide you will need, you are ready to create your solution. Fill your sprayer halfway with water, then add the required amount of herbicide to the tank. Replace the cap and agitate by shaking the sprayer. Add your required amount of Alligare 90 and the remaining water, then repeat agitation until herbicide solution is thoroughly mixed.
  • Step 3: Now that your solution is created, you can begin applying treatment. For maximum results, thoroughly cover the weeds with spray. You should be applying your solution to the point of runoff. Be sure to get even coverage when applying. Check your spray settings; this will affect the way your solution is applied onto the weeds.

Where to Use

Grassmaster Herbicide is designed for use on agricultural lands, croplands, ranges, and pastures. It is also used to control brush and broadleaf weeds on rights-of-way, forest brush, industrial sites, and other labeled non-crop areas. See the label for the full list.

When to Use

Apply Grassmaster Herbicide when weeds are young and growing since this is when they are most vulnerable. Use this product on a day where wind speeds are lower than 15 mph and the temperature does not exceed 90 degrees Fahrenheit.

Safety Information

Before applying this product, make sure to put on the proper PPE for safety (long sleeved clothing, gloves, face mask, goggles). The product is safe for pets and kids when used according to the label. Pets and children should not be present during treatment and should remain out of the treated areas until they have completely dried.

This product is toxic to fish and other aquatic organisms. Do not apply to water or areas near bodies of water.

Special Considerations

Because Grassmaster Herbicide is a post-emergent herbicide, it will only work after weeds have become visible on your land. 

AvailabilityOnline
Restricted UseNo
Shipping RestrictionsAK, CA, CT, HI, IN, MI, NY, OR, RI, SC, TX, VT, WA
BrandALLIGARE
Keith's Pro Tips"Dicamba Plus 2,4-D Herbicide is a combination of two great active ingredients, meaning that it will kill a broad range of weeds so you don't have to use or mix a bunch of different products if a weed is being particularly stubborn."
Product DrawbacksMay require the use of a surfactant for the product to stick better to weeds.
Target PestsDicamba Plus 2,4-D Herbicide is for the control of broadleaf weeds such as Annual Fleabane, Annual Mustards, Annual Sowthistle, Bitter Sneezeweed, Bittercress, Black Knapweed, Black Nightshade, Broomweed, Buckeye Species, Buffalobur, Bull Thistle, Bullnettle, Bur Clover, Burdock, Buttercup, Canada Thistle, Carolina Horsenettle, Chicory, Chinese Tallow Tree, Common Chickweed, Common Cocklebur, Common Dandelion, Common Goldenrod, Common Lambsquarters, Common Mallow, Common Ragweed, Common Waterhemp, Common Purslane, Cow Cockle, Curly Dock, Devil's Claw, Dogfennel, Eastern Persimmon, Elderberry, Evening Primrose, Field Bindweed, Field Pennycress, Flixweed, Fringed Sagebrush, Hairy Honeysuckle, Hairy Vetch, Henbit, Ivyleaf Morning Glory, Knotweed spp, Kochia, Lanceleaf Western, Leafy Spurge, Marestail, Marshelder, Mayweed, Mesquite, Milkweed, Missouri Goldenrod, Musk Thistle, Palmer Amaranth, Pennsylvania Smartweed, Perennial Smartweed, Perennial Sowthistle, Plains Coreopsis, Plumless Thistle, Poison Ivy, Poorjoe, Prickly Lettuce, Prostrate Pigweed, Rabbitbrush, Red Sorrel, Redroot Pigweed, Redvine, Russian Knapweed, Russian Thistle, Sedge, Shepardspurse, Silverleaf Nightshade, Smallseed Falseflax, Smooth Pigweed, Southern Dewberry, Spotted Beebalm, Spotted Knapweed, Sunflower, Tall Morning Glory, Tansy Mustards, Tansy Ragwort, Texas Groundsel, Tumble Pigweed, Velvetleaf, Virginia Pepperweed, Wild Buckwheat, Wolly Croton, Yankeeweed, and Yellow Starthistle.
Application EquipmentHose End Sprayer, Pump Sprayer, Spray Rig
Application MethodsBroadcast Spray, Spot Treatment
Active IngredientDimethylamine salt of 3,6-D 12.5%, Dimethylamine salt of 2,4-D 36.0%
Product TypeHerbicide
FormulationEmulsifiable Concentrate (EC)
Application RateYou will use 0.5 to 4 pints per acre per application depending on target vegetation. For more specific application rates please refer to the label.
Shelf LifeGrassmaster Herbicide will last for 3 years when stored above temperatures of 32 degrees Fahrenheit and below 100 degrees Fahrenheit. Store in original container in a well-ventilated area separately from fertilizer, feed, and foodstuffs. Keep container tightly closed when not in use.
YieldCoverage area of Grassmaster Herbicide varies depending on size of container purchased, target vegetation, and application site. For general coverage 1 quart will cover approximately 1/2 acre if used at the higher rate.
Use SitesOutdoors
Time to KillDicamba Plus 2,4-D Herbicide begins to eliminate target weeds shortly after treatment but may take up to several weeks to completely kill off unwanted vegetation.
Comparable Products3-D Herbicide Triplet Alternative
Incompatible Home SidingBrick, Hardie Plank, Stone Veneer, Wood, Vinyl
EPA Registration #81927-42
5/5
Based on 2 reviews
  • 100%(2)
  • 0%(0)
  • 0%(0)
  • 0%(0)
  • 0%(0)
100%
8/2/23
Leoanrd Flowers
Verified Buyer
Drifts to non target areas
Be careful how this product is used. Use plenty of crop oil to hold the drift down. Dicamba will kill or damage certain non target trees if allow to drift. use in low wind conditions even when spot spraying.
100%
8/19/17
kevin huffman
Verified Buyer
Amazing, where a respirator too! Killed the nasty mairstail horseweed that is fuff to kill. Worked great after i got the right mixture.
More Information
Restricted Use No
Shipping Restrictions AK, CA, CT, HI, IN, MI, NY, OR, RI, SC, TX, VT, WA
Availability Online
Signal Word DANGER
Keith's Pro Tip "Dicamba Plus 2,4-D Herbicide is a combination of two great active ingredients, meaning that it will kill a broad range of weeds so you don't have to use or mix a bunch of different products if a weed is being particularly stubborn."
Target Pests Multi Annual Fleabane, Annual Mustards, Annual Sowthistle, Bitter Sneezeweed, Bittercress, Black Knapweed, Black Nightshade, Broomweed, Buckeye, Buffalobur, Bull Nettle, Bull Thistle, Bur Clover, Burdock, Buttercup, Canada Thistle, Carelessweed, Carolina Horsenettle, Carpetweed, Cherry, Chickweed, Clover, Cocklebur, Common Chickweed, Common Cocklebur, Common Dandelion, Common Goldenrod, Common Lambsquarters, Common Mallow, Common Purslane, Common Ragweed, Common Waterhemp, Cowcockle, Curly Dock, Dalmation Toadflax, Devils Claw, Dewberry, English_Daisy, Evening Primrose, Field Bindweed, Field Pennycress, Flixweed, Fringed Sagebrush, Greenbriar, Hairy Honeysuckle, Hairy Vetch, Henbit, Honeysuckle, Horseweed/Marestail, Ivyleaf Morningglory, Knawel, Knotweed, Kochia, Kudzu, Lambsquarters, Lanceleaf Sage, Lanceleaf Western, Leafy Spurge, Marshelder, Mayweed, McCartney Rose, Milkweed, Missouri Goldenrod, Morningglory, Multiflora Rose, Musk Thistle, Oak, Palmer Amaranth, Pennsylvania Smartweed, Perennial Ragweed, Perennial Sowthistle, Pigweed, Plains Coreopsis, Plumeless Thistle, Poison Ivy, Poison Oak, Poorjoe, Prickly Lettuce, Prostrate Pigweed, Puncture Vine, Purslane, Rabbitbrush, Ragweed, Raspberry, Redroot Pigweed, Redvine, Rough Pigweed, Russian Knapweed, Russian Thistle, Sagebrush, Sedge, Sheep Sorrel, Shepherdspurse, Silverleaf Nightshade, Smallseed Falseflax, Smartweed, Smooth Pigweed, Snowberry, Southern Dewberry, Spotted Beebalm, Spotted Knapweed, Sunflower, Tall Morningglory, Tansy Mustard, Tansy Ragwort, Texas Groundsel, Trumpet Creeper, Tumble Pigweed, Velvetleaf, Virginia Creeper, Virginia Pepperweed, Western Salsify, Wild Buckwheat, Wild Carrot, Willow, Woolly Croton, Yankeweed, Yellow Starthistle, Alder, Ash, Aspen, Basswood, Beech, Birch, Black Gum, Black Locust, Blackberry, Brazilian Peppertree, Cedar, Chicory, Chinese Tallowtree, Chinquapin, Christmas-berry, Cottonwood, Creosotebush, Cucumber Tree, Dogfennel, Dogwood, Eastern Persimmon, Eastern Red Cedar, Elderberry, Elm, Florida Holly, Grape, Gum, Hawthorn, Hemlock, Honey Locust, Hornbeam, Huckleberry, Huisache, Locust, Maples, Mesquite, Mustard, Persimmon, Pine, Poplar, Sassafras, Schinus, Serviceberry, Spruce, Sumac, Sweet Gum, Sycamore, Tarbrush, Wax Myrtle, Wild Plum, Witchhazel, Yaupon, Yucca
Time to Kill Dicamba Plus 2,4-D Herbicide begins to eliminate target weeds shortly after treatment but may take up to several weeks to completely kill off unwanted vegetation.
Chemical Type Herbicide
Formulation Emulsifiable Concentrate (EC)
Application Methods Broadcast Spray, Spot Treatment
Product Drawbacks May require the use of a surfactant for the product to stick better to weeds.
Active Ingredient Dimethylamine salt of 3,6-D 12.5%, Dimethylamine salt of 2,4-D 36.0%
Application Equipment Hose End Sprayer, Pump Sprayer, Spray Rig
Mix Rate You will use 0.5 to 4 pints per acre per application depending on target vegetation. For more specific application rates please refer to the label.
Low Use Rate 0.18 oz./1,000 sq. ft.
High Use Rate 2.90 oz./1,000 sq. ft.
Use Sites Outdoors
Yield Coverage area of Grassmaster Herbicide varies depending on size of container purchased, target vegetation, and application site. For general coverage 1 quart will cover approximately 1/2 acre if used at the higher rate.
EPA Registration No. 81927-42
Shelf Life Grassmaster Herbicide will last for 3 years when stored above temperatures of 32 degrees Fahrenheit and below 100 degrees Fahrenheit. Store in original container in a well-ventilated area separately from fertilizer, feed, and foodstuffs. Keep container tightly closed when not in use.
Comparable Products 3-D Herbicide Triplet Alternative
Children or pets? Yes
Property Characteristics None
Questions and Answers
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  1. Q:Could this POTENTIALLY be used on St Augustine Grass if the Dicamba and 2,4 D were diluted down to similar percentages as products like Spectracide Weed Stop and Ortho Weed Clear? My St Augustine tolerates these products, and they work (slowly), but they are expensive.
    10/2/23
    A:If your "grass" is under stress (drought) i would say NOT! healthy stands of grass should be able to tolerate this herbacide . I used it on my pastures last year and it seemed to control broadleaf's well

    Steven E Gorecky

    10/3/23
    Certified Buyer
  2. Q:How long after application can horses graze on treated area?
    9/18/23
    A:For this product, 'there is no waiting period between treatment and grazing for non-lactating, non-meat animals'. Waiting until the spray application has dried and allow 4-8 hours to become rain-fast are common practices.

    Craig Martens

    9/18/23
    Certified Buyer
  3. Q:Will this product work on milkweed in a fescue grass pasture?
    8/1/23
    A:Dicamba Plus 2,4-D Herbicide does not specifically mention fescue, but can be used on certain grass species intended for hay and silage in pastures. It would be best to speak directly with the manufacturer, Alligare, since this is not mentioned on the label. https://alligare.com/contact-us/

    Amanda Chavez

    8/1/23
    Certified Buyer
  4. Q:If I live in Texas can you ship it to me, and if not, can I pick it up in store?
    6/7/23
    A:Dicamba Plus 2,4-D Herbicide cannot be bought in or shipped to Texas. Each states department of agriculture regulates the use of certain chemicals within products, which may not be approved of in certain states like Texas. You may speak directly with our customer service team at 800-479-6583 for similar product suggestions.

    Amanda Chavez

    6/7/23
    Certified Buyer
  5. Q:Will this kill lesser celandine?
    2/20/23
    A:Dicamba Plus 2,4-D Herbicide is labeled to control buttercups, which is another name for lesser celandine.

    Amanda Chavez

    2/20/23
    Certified Buyer
  6. Q:Is this 1 gallon or 2.5 gallon?
    11/16/22
    A:I don't know. I ordered it but didn't received anything for 8 months. And then I had to email and call 5-6 times for a refund.

    John Kim

    11/16/22
    Certified Buyer
  7. Q:This can kill Crepe Myrtle growing agin after removal of tree?
    9/30/22
    A:Dicamba Plus 2,4-D Herbicide is not labeled for crepe myrtle control.

    Amanda Chavez

    9/30/22
    Certified Buyer
  8. Q:Will it kill sandspurs, but not harm my bermuda grass?
    8/25/22
    A:Dicamba Plus 2,4-D Herbicide will not kill sandburs.

    Amanda Chavez

    8/25/22
    Certified Buyer
  9. Q:Plan on using this product (tank sprayer) on horse pastures. What is the withdraw time before you can graze horses on treated pastures?
    8/22/22
    A:There is no waiting period between treatment and grazing for non-lactating, non-meat animals. Do not permit meat animals being finished for slaughter to graze treated fields within 30 days of slaughter. For more specifics such as application rates and other crop restrictions for grazing animals, refer to the chart on page 5 of the product label and the information underneath Vl. FOOD/FEED CROP SPECIFIC INFORMATION.

    Amanda Chavez

    8/23/22
    Certified Buyer
  10. Q:Can it kill tumble weed? Also cactuses?
    6/25/22
    A:Dicamba Plus 2,4-D Herbicide is labeled to control Russian thistles, which is another name for tumbleweed. However, it will not control cactuses. For cactus control, we recommend reading our DIY guide for suggested products and application tips to successfully get rid of cactus. https://www.solutionsstores.com/cactus-control

    Amanda Chavez

    6/27/22
    Certified Buyer
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