Alligare Imazapyr 4 SL

In stock

Starting at $66.95

Grouped product items
Product Name Price/Ea. Quantity
Alligare Imazapyr 4 SL- Qt.
Alligare Imazapyr 4 SL- Qt.
Alligare Imazapyr 4 SL- Gallon
Alligare Imazapyr 4 SL- Gallon
  • Buy 2 for $169.95 each and save 3%
Out of stock
Alligare Imazapyr 4 SL -2.5 Gallon
Alligare Imazapyr 4 SL -2.5 Gallon
  • Buy 2 for $399.95 each and save 5%
Total: $0.00

Pro Tips
Pro Tips & Quick Tricks

If you are worried about it spreading from run-off, I would use Monterey's Perc-O-Late Plus. This helps the chemical penetrate the soil and limits it from spreading outwards.

Product Information

Alligare Imazapyr 4 SL

Imazapyr 4 SL, with Imazapyr 52.6% is a broad-spectrum, pre and post-emergent spray for control of most broadleaf weeds, vines, brambles, annual and perennial grasses, trees for forestry site preparation, hardwood brush, and release of conifers from woody and herbaceous competition. It is used for bare ground control of unwanted vegetation, sterilizing the soil it is sprayed over for up to a year. Compare Imazapyr 4 SL to Arsenal AC

  • May also be mixed in water and used for stump and cut-stem treatment for control of unwanted woody vegetation.
  • Can be applied along forest roads to control undesirable vegetation.
  • Can be used for the control of undesirable vegetation along non-irrigation ditch banks and the establishment and maintenance of wildlife openings.

How Imazapyr 4 SL Works

Vegetation absorbs Imazapyr through the roots and foliage. It moves throughout the plant causing chlorosis (a yellowing of plant tissues). Afterward, tissue necrosis is spread throughout. After application, Alligare Imazapyr 4 SL moves to the roots of the plant and kills the roots and underground storage tissue and prevents most emerging growth. The tissue necrosis and chlorosis may appear for several weeks in some plant species. It may take months for woody plants, brush, and trees to show the necrosis or chlorosis.

Mixing Gude of Imazapyr 4 SL

  • 1 Gallon of water with 1-1/3 oz (1.0% concentration) to 6.2/3 oz (5.0 oz % concentration) with 1/3 oz of nonionic surfactant
  • 5 Gallons of water with 6-2/3 oz (1.0% concentration) to  2 pts (5.0 oz % concentration) with 1-2/3 oz of nonionic surfactant
  • 25 Gallons of water with 2 pts (1.0% concentration) to  10 pts (5.0 oz % concentration) with 8 oz  of nonionic surfactant
  • 100 Gallons of water with 1 gallon (1.0% concentration)  to 5 gallons (5.0 oz % concentration) with 2 pts of nonionic surfactant
  • Alligare 90 Non-Ionic Surfactant would be a recommended nonionic surfactant
  • See label for complete instructions

Directions For Use

  • Use this product according to Federal law according to the label.
  • 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
  • Use Alligare Imazapyr 4 SL according to the label.
  • Keep containers closed to avoid spills and contamination.
  • Alligare Imazapyr 4 SL may be applied using low volume hand sprayers, ground sprayers, and low volume back pack or pump up sprayers, or helicopters.
  • Observe all cautions and limitations in the labels of products used in combination with Alligare Imazapyr 4 SL.
Packaging N/A
Product Label Alligare Imazapyr Label
SDS Alligare Imazapyr SDS
More PDF's N/A
Target Pest

Grasses: include the following:

  • Annual bluegrass (Poa annua)
  • Bahiagrass (Paspalum notatum)
  • Barnyardgrass (Echinochloa crus-galli)
  • Beardgrass (Andropogon spp .)
  • Bermudagrass (Cynodon dactylon)
  • Big bluestem (Andropogon gerardii)
  • Broadleaf signalgrass (Brachiaria platyphylla)
  • Cattail
  • Crabgrass
  • Dallisgrass
  • Fescue
  • Goosegrass
  • Itchgrass
  • other listed grasses.(see label)

Broadleaf Weeds: include the following:

  • Bull thistle
  • Burclover
  • Burdock
  • Camphorweed
  • Canada thistle
  • Carolina geranium
  • Carpetweed
  • Chickweed
  • Clover
  • Cocklebur
  • Common chickweed
  • Common ragweed
  • Cudweed
  • Dandelion
  • Desert camelthorn 
  • Other listed weeds(See label)

Vines and Brambles include the following:

  • Field bindweed
  • Hedge bindweed
  • Honeysuckle
  • Morning glory
  • Poison ivy
  • Other listed vines and brambles (see label)


Active Ingredient (s) Imazapyr 52.6%
For Use :
  • Undesirable vegetation in aquatic sites, forestry sites, grass pasture, fence rows, rangeland, maintenance of wildlife openings, industrial noncropland such as utility, railroad, pipeline rights of way, petroleum tank farms, storage areas, pumping installations, building perimeters, roads, transmission lines, and industrial bare ground areas.
  • In the State of New York, aquatic uses are not allowed.
Yield N/A
Mixture|Application N/A
  • Mix 1 1/3 oz per gallon of water + 1/3 oz of a non-ionic surfactant for low volume broadcast.
  • Use 1-3 pts per acre for control of grassy and broadleaf weeds.
  • For aquatic treatment use Imazapyr 4 SL Herbicide at a rate of 0.5-1.5 pints per acre.
  • Not to exceed 1.5 pints per acre per year.
Shipping Restrictions CO, NY, VT, WA
More Instructions


  • This product is toxic to plants.
  • Drift and run-off may be hazardous to plants in water adjacent to treated areas.
  • Do not apply to water except as specified on this label.
  • Treatment of aquatic weeds may result in oxygen depletion or loss due to decomposition of dead plants.
  • Do not treat more than one-half the surface area of the water in a single operation and wait at least 10 to 14 days between treatments.
  • Begin treatments along the shore and proceed outward in bands to allow aquatic organisms to move into untreated areas.
  • Do not contaminate water when disposing of equipment washwaters or rinsate.
  • See Directions for Use for additional precautions and requirements.

Frequently Asked Questions


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