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Lontrel Herbicide

Outstanding turf tolerance

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Lontrel® specialty herbicide provides superior postemergence control of hard-to-manage weeds, including thistle and clover, around labeled ornamentals, golf course fairways and roughs without injuring even the most sensitive turfgrasses.
Active Ingredient %
Clopyralid 40.90 %
Other Ingredients 59.10 %
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$178.95 / qt
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Available on Do My Own

$182.95 / qt
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Not Safe On
No not safe on treatments listed. Please, review the label or contact the merchant for more information.
Maximum Yearly Limits
Do not apply more than 1 1/3 pint per acre per year.
Before Seeding Instructions
Do not reseed turfgrass for 3 weeks after application.
After Seeding Instructions
Established grasses are tolerant to Lontrel Turf and Ornamental, but new grass seedlings may be injured to varying degrees until the grass has become well established as indicated by vigorous growth and development of tillers and secondary roots.
Surfactant Instructions
Addition of surfactants, crop oils, or other adjuvants is not usually necessary when using this product. Adding a surfactant to the spray mixture may increase effectiveness on weeds but may reduce selectivity to the crop or desirable plant, particularly under conditions of plant stress. If an adjuvant is added to the spray solution, follow all manufacturer use guidelines.
CertainLabel™

Lontrel Optimized Application Label Rate Calculator

Legend:
Control
Suppression
No Control
1
Grass / Turf Types Safe
Bahiagrass
Bentgrass
Bermudagrass
Buffalograss
Centipedegrass
Chewings Fescue
Kentucky Bluegrass
Kikuyu Grass
Perennial Ryegrass
Red Fescue
Seashore Paspalum
St. Augustinegrass
Tall Fescue
Zoysiagrass
1
Jump to CertainLabel™ Lontrel Label Rates & Calculator for these 14 turf types
Spot Treatment
Label Rate:
0.09 - 0.51 fluid ounces per gallon
Cost Effectiveness:
Makes 63.09 - 350.501 gallons
at a cost of
$0.51 - $2.84 per gallon
Blanket Treatment
Label Rate:
0.09 - 0.51 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 63090 - 350501 square feet
at a cost of
$0.51 - $2.84 per 1,000 sqft
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3
Spot Treatment
Label Rate:
0.09 - 0.12 fluid ounces per gallon
Cost Effectiveness:
Makes 262.876 - 350.501 gallons
at a cost of
$0.51 - $0.68 per gallon
Blanket Treatment
Label Rate:
0.09 - 0.12 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 262876 - 350501 square feet
at a cost of
$0.51 - $0.68 per 1,000 sqft
4
Spot Treatment
Label Rate:
0.51 fluid ounces per gallon
Cost Effectiveness:
Makes 63.09 gallons
at a cost of
$2.84 per gallon
Blanket Treatment
Label Rate:
0.51 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 63090 square feet
at a cost of
$2.84 per 1,000 sqft
5
Spot Treatment
Label Rate:
0.12 - 0.18 fluid ounces per gallon
Cost Effectiveness:
Makes 175.251 - 262.876 gallons
at a cost of
$0.68 - $1.02 per gallon
Blanket Treatment
Label Rate:
0.12 - 0.18 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 175251 - 262876 square feet
at a cost of
$0.68 - $1.02 per 1,000 sqft
6
Spot Treatment
Label Rate:
0.37 fluid ounces per gallon
Cost Effectiveness:
Makes 86.032 gallons
at a cost of
$2.08 per gallon
Blanket Treatment
Label Rate:
0.37 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 86032 square feet
at a cost of
$2.08 per 1,000 sqft
7
Spot Treatment
Label Rate:
0.25 fluid ounces per gallon
Cost Effectiveness:
Makes 129.637 gallons
at a cost of
$1.38 per gallon
Blanket Treatment
Label Rate:
0.25 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 129637 square feet
at a cost of
$1.38 per 1,000 sqft
Instructions:
Control of Canada thistle: For effective control of Canada thistle, apply Lontrel Turf and Ornamental at the rate of 2/3 pint per acre when the majority of thistle plants have emerged and are from 6 to 8 inches in height or diameter to bud stage. For best results, do not cultivate areas before or after application since cultivation can disrupt translocation of the herbicide to the roots of Canada thistle and reduce control. If cultivation is necessary following application, it should be delayed 14 to 20 days. In landscape settings, for control of Canada thistle apply only as a directed spot application as described above to avoid injuring non-target plants. In nurseries, a spot treatment or broadcast application may be made as directed.
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