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Target Pests

Tordon 22K Herbicide is for the control of annual and perennial broadleaf weeds woody plants, and vines such as bindweed, cocklebur, daisy, dock, goldenrod, groundsel, horseweed, knapweed, lambsquarters, larkspur,, mayweed, milkweed, pigweed, ragweed, ragwort, smartweed, sowthistle, spurge, sunflower, thistle, yankeeweed, aspen, cedars, douglas fir, dogwood, hickory, maple, persimmon, live oak, poison oak, sagebrush, sassafrass, sumac, willows, and many other listed weeds.,

For Use In

Picloram 22K Herbicide is for use in rangelands, permanent grass pastures, forest planting sites, fallow cropland, spring seeded wheat, industrial manufacturing sites, rights-of-way, pipelines, roadsides, railroads, wildlife openings, and on conservation reserve program lands.,


Hand-Held Sprayers: Hand-held or backpack sprayers may be used for spot applications of Alligare Picloram 22K if care is taken to apply the spray uniformly and at a rate equivalent to a broadcast application. Application rates in the table are based on an area of 1,000 sq. ft.

Mix the amount of Alligare Picloram 22K (fl. oz. or ml) corresponding to the desired broadcast rate in 0.5 to 2.5 gallons of water, depending on the spray volume required to treat 1,000 sq. ft.

To calculate the amount of Alligare Picloram 22K required for larger areas, multiply the table value (fl. oz. or ml) by the area to be treated in “thousands” of square feet, e.g., if the area to be treated is 3,500 sq. ft., multiply the table value of 3.5 (calc. 3,500/1,000 = 3.5). An area of 1,000 sq. ft. is approximately 10.5 x 10.5 yards (strides) in size.

Coverage Area

Each Gallon of picloram will treat up to 4 acres of land.

Time to Kill

Picloram 22K Herbicide begins to kill target weeds 2 weeks after contact but can take up to several weeks for complete control all depending on treatment area and application.

Mix Rate

Maximum Use Rates:

Non-cropland Areas and Rights-of-Way: Total use of picloram, including retreatments or spot treatments, must not exceed 1 lb ae per acre picloram (2 quarts per acre Alligare Picloram 22K) per annual growing season.

Forest Sites: No more than 1 lb. ae picloram (2 quarts of Alligare Picloram 22K) per acre may be applied one time every two years to forest sites.

Rangeland and Permanent Grass Pastures: For control of noxious weeds as defined by federal, state, or local authorities, picloram may be applied at up to 1 lb ae per acre (2 quarts Alligare Picloram 22K per acre) per annual growing season as a broadcast treatment.

Spot treatments may be applied at the equivalent broadcast rate of up to 1 lb ae picloram (2 quarts Alligare Picloram 22K) per acre.

Active Ingredient

Picloram 24.4%

Tordon 22k Herbicide (Picloram)

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Tordon 22k Herbicide (Picloram)

Tordon 22K Herbicide from Alligare is a picloram based weed killer that is used especially to kill Japanese knot weed, to spray brush, and to control prickly pear cactus in range and pasture lands. Tordon 22K can also be used to kill trees and other brush. This herbicide requires a applicator permit license to purchase. Not for Sale to Rhode Island
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