Home > Weed Killers > Prime Source Quinclorac Select 1.5L Herbicide
Prime Source Quinclorac Select 1.5L Herbicide
Selective post-emergent herbicide for efficient weed control
Quinclorac 1.5L Select™ is a selective, post-emergent herbicide that can be safely applied to many types of turf to control a variety of broadleaf and grassy weeds. Quinclorac 1.5L Select can be applied to both residential and non-residential turf. Quinclorac 1.5L Select can be applied from 7 days before seeding and up to 28 days after emergence on selected weeds. The use of a methylated seed oil, such as Duo Stick Select is recommended to greatly enhance the effectiveness of the product.
| Active Ingredient | % |
|---|
| Quinclorac | 18.92 % |
| Other Ingredients | 81.08 % |
Mode of Action
Lipid Synthesis Inhibitors
Site of Action
(1) ACCase Inhibitor
Safe On
Click on a grass type below to see safe application rates:
Annual Bluegrass, Annual Ryegrass, Bahiagrass, Buffalograss, Centipedegrass, Chewings Fescue, Colonial Bentgrass, Dichondra, Hard Fescue, Kentucky Bluegrass, Perennial Ryegrass, Red Fescue, Roughstalk Bluegrass, Seashore Paspalum, Seaside Bentgrass, St. Augustinegrass, Tall Fescue, Zoysiagrass, Bentgrass, Bermudagrass, and Fine Fescue
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 128 fluid ounces of Quinclorac 1.5L Select herbicide per acre (or 2.9 fl. oz. per 1,000 sq. ft.) in one year (1.4 lbs. aeper acre per year).
Mowing Instructions
DO NOT mow 2 days before or after applying Quinclorac 1.5L Select to maximize weed control and minimize potential turf injury. Clippings fromthe first three mowings after application should be left on the treated area.
Before Seeding Instructions
The use of Quinclorac 1.5L Select before or after seeding or overseeding a turf area will not significantly interfere with the turf grass seedgermination and growth of those grass types identified as tolerant or moderately tolerant in Table 1. Consult Table 4 on label for timing ofapplications concerning any seeding, overseeding or sprigging situation.
Surfactant Instructions
Methylated seed oil is the preferred adjuvant for post-emergence applications. However, if an MSO is not available in your region, the useof a crop oil concentrate or other high-quality surfactant must be used in the spray tank at the time of application.
CertainLabel™
Prime Source Quinclorac Select 1.5L Optimized Application Label Rate Calculator
Legend:
Control
Suppression
No Control
Spot Treatment:
per
Blanket Treatment:
per
1
| Grass / Turf Types | Safe |
|---|---|
| Annual Bluegrass |
|
| Annual Ryegrass |
|
| Bahiagrass |
|
| Buffalograss |
|
| Centipedegrass |
|
| Chewings Fescue |
|
| Colonial Bentgrass |
|
| Dichondra |
|
| Hard Fescue |
|
| Kentucky Bluegrass |
|
| Perennial Ryegrass |
|
| Red Fescue |
|
| Roughstalk Bluegrass |
|
| Seashore Paspalum |
|
| Seaside Bentgrass |
|
| St. Augustinegrass |
|
| Tall Fescue |
|
| Zoysiagrass |
|
1
Jump to
CertainLabel™ Prime Source Quinclorac Select 1.5L Label Rates & Calculator
for
these 18 turf types
Spot Treatment
per
Label Rate:
185.6 fluid ounces per gallon
Cost Effectiveness:
Makes 0.345 gallons
at a cost of
$184.41 per gallon
at a cost of
$184.41 per gallon
Blanket Treatment
per
Label Rate:
1.45 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 44138 square feet
at a cost of
$1.44 per 1,000 sqft
at a cost of
$1.44 per 1,000 sqft
2
| Grass / Turf Types | Safe |
|---|---|
| Bentgrass |
|
2
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CertainLabel™ Prime Source Quinclorac Select 1.5L Label Rates & Calculator
for
Bentgrass
Spot Treatment
per
Label Rate:
64 - 128 fluid ounces per gallon
Cost Effectiveness:
Makes 0.5 - 1 gallons
at a cost of
$63.59 - $127.18 per gallon
at a cost of
$63.59 - $127.18 per gallon
Instructions:
See label page 10 for more information.
Blanket Treatment
per
Label Rate:
0.5 - 1 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 64000 - 128000 square feet
at a cost of
$0.50 - $0.99 per 1,000 sqft
at a cost of
$0.50 - $0.99 per 1,000 sqft
Instructions:
See label page 10 for more information.
3
| Grass / Turf Types | Safe |
|---|---|
| Bermudagrass |
|
3
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CertainLabel™ Prime Source Quinclorac Select 1.5L Label Rates & Calculator
for
Bermudagrass
Spot Treatment
per
Label Rate:
185.6 fluid ounces per gallon
Cost Effectiveness:
Makes 0.345 gallons
at a cost of
$184.41 per gallon
at a cost of
$184.41 per gallon
Blanket Treatment
per
Label Rate:
1.45 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 44138 square feet
at a cost of
$1.44 per 1,000 sqft
at a cost of
$1.44 per 1,000 sqft
Instructions:
Yellowing that occurs on these species can be reduced by the addition of chelated iron or sprayable soluble nitrogen fertilizer (see Application Information and Addition of Adjuvants).
4
| Grass / Turf Types | Safe |
|---|---|
| Fine Fescue |
|
4
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CertainLabel™ Prime Source Quinclorac Select 1.5L Label Rates & Calculator
for
Fine Fescue
Spot Treatment
per
Label Rate:
185.6 fluid ounces per gallon
Cost Effectiveness:
Makes 0.345 gallons
at a cost of
$184.41 per gallon
at a cost of
$184.41 per gallon
Instructions:
Apply Quinclorac 1.5L Select herbicide to fine fescue only when it is part of a blend.
Blanket Treatment
per
Label Rate:
1.45 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 44138 square feet
at a cost of
$1.44 per 1,000 sqft
at a cost of
$1.44 per 1,000 sqft
Instructions:
Apply Quinclorac 1.5L Select herbicide to fine fescue only when it is part of a blend.
1
1
Jump to
CertainLabel™ Prime Source Quinclorac Select 1.5L Label Rates & Calculator
for
these 14 weeds
Spot Treatment
per
Label Rate:
1.45 fluid ounces per gallon
Cost Effectiveness:
Makes 44.138 gallons
at a cost of
$1.44 per gallon
at a cost of
$1.44 per gallon
Blanket Treatment
per
Label Rate:
1.45 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 44138 square feet
at a cost of
$1.44 per 1,000 sqft
at a cost of
$1.44 per 1,000 sqft
2
| Weeds | Pre- Emergent |
Post-Emergent |
|---|---|---|
| Foxtail, Giant |
|
|
| Foxtail, Green |
|
|
| Foxtail, Yellow |
|
|
2
Jump to
CertainLabel™ Prime Source Quinclorac Select 1.5L Label Rates & Calculator
for
these 3 weeds
Spot Treatment
per
Label Rate:
1.45 fluid ounces per gallon
Cost Effectiveness:
Makes 44.138 gallons
at a cost of
$1.44 per gallon
at a cost of
$1.44 per gallon
Blanket Treatment
per
Label Rate:
1.45 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 44138 square feet
at a cost of
$1.44 per 1,000 sqft
at a cost of
$1.44 per 1,000 sqft
Instructions:
Under certain conditions, application of Quinclorac 1.5L Select made to annual grasses at 2 to 4 tiller may not provide complete control. A sequential application will be required for grass control in these situations. Optimum control is achieved when applications of Quinclorac 1.5L Select + methylated seed oil are applied either before second tiller or as weed grasses mature.
3
| Weeds | Pre- Emergent |
Post-Emergent |
|---|---|---|
| Crabgrass, Large |
|
|
| Crabgrass, Smooth |
|
|
3
Jump to
CertainLabel™ Prime Source Quinclorac Select 1.5L Label Rates & Calculator
for
these 2 weeds
Spot Treatment
per
Label Rate:
1.45 fluid ounces per gallon
Cost Effectiveness:
Makes 44.138 gallons
at a cost of
$1.44 per gallon
at a cost of
$1.44 per gallon
Blanket Treatment
per
Label Rate:
1.45 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 44138 square feet
at a cost of
$1.44 per 1,000 sqft
at a cost of
$1.44 per 1,000 sqft
Instructions:
Under certain conditions, application of Quinclorac 1.5L Select made to annual grasses at 2 to 4 tiller may not provide complete control. A sequential application will be required for grass control in these situations. Optimum control is achieved when applications of Quinclorac 1.5L Select + methylated seed oil are applied either before second tiller or as weed grasses mature. Biotypes of large and smooth crabgrass in California have shown varied response to Quinclorac 1.5L Select. If control failure occurs following a full or split application, DO NOT reapply Quinclorac 1.5L Select. Change to a herbicide with a different mode of action.
4
| Weeds | Pre- Emergent |
Post-Emergent |
|---|---|---|
| Daisy, English |
|
|
4
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CertainLabel™ Prime Source Quinclorac Select 1.5L Label Rates & Calculator
for
English Daisy
Spot Treatment
per
Label Rate:
1.45 fluid ounces per gallon
Cost Effectiveness:
Makes 44.138 gallons
at a cost of
$1.44 per gallon
at a cost of
$1.44 per gallon
Blanket Treatment
per
Label Rate:
1.45 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 44138 square feet
at a cost of
$1.44 per 1,000 sqft
at a cost of
$1.44 per 1,000 sqft
Instructions:
Tank mix partner or sequential application required. NOT FOR USE to control this weed in California.
5
| Weeds | Pre- Emergent |
Post-Emergent |
|---|---|---|
| Dandelion, Common |
|
|
5
Jump to
CertainLabel™ Prime Source Quinclorac Select 1.5L Label Rates & Calculator
for
Common Dandelion
Spot Treatment
per
Label Rate:
1.45 fluid ounces per gallon
Cost Effectiveness:
Makes 44.138 gallons
at a cost of
$1.44 per gallon
at a cost of
$1.44 per gallon
Blanket Treatment
per
Label Rate:
1.45 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 44138 square feet
at a cost of
$1.44 per 1,000 sqft
at a cost of
$1.44 per 1,000 sqft
Instructions:
Tank mix partner or sequential application required.
6
| Weeds | Pre- Emergent |
Post-Emergent |
|---|---|---|
| Kikuyu Grass |
|
|
6
Jump to
CertainLabel™ Prime Source Quinclorac Select 1.5L Label Rates & Calculator
for
Kikuyu Grass
Spot Treatment
per
Label Rate:
1.45 fluid ounces per gallon
Cost Effectiveness:
Makes 44.138 gallons
at a cost of
$1.44 per gallon
at a cost of
$1.44 per gallon
Blanket Treatment
per
Label Rate:
1.45 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 44138 square feet
at a cost of
$1.44 per 1,000 sqft
at a cost of
$1.44 per 1,000 sqft
Instructions:
Make 2 sequential applications of 1.0 fl. oz. (0.51 lb. AI/A) of Quinclorac 1.5L Select per 1,000 sq. ft. and an additional sequential application up to 0.90 fl. oz. (0.46 lb. AI/A) of Quinclorac 1.5L Select per 1,000 sq. ft. at 14- to 21-day intervals. Biotypes of large and smooth crabgrass in California have shown varied response to Quinclorac 1.5L Select. If control failure occurs following a full or split application, DO NOT reapply Quinclorac 1.5L Select. Change to a herbicide with a different mode of action.
7
| Weeds | Pre- Emergent |
Post-Emergent |
|---|---|---|
| Torpedograss |
|
|
7
Jump to
CertainLabel™ Prime Source Quinclorac Select 1.5L Label Rates & Calculator
for
Torpedograss
Spot Treatment
per
Label Rate:
1.45 fluid ounces per gallon
Cost Effectiveness:
Makes 44.138 gallons
at a cost of
$1.44 per gallon
at a cost of
$1.44 per gallon
Blanket Treatment
per
Label Rate:
1.45 fluid ounces per 1,000 sqft
Cost Effectiveness:
Covers 44138 square feet
at a cost of
$1.44 per 1,000 sqft
at a cost of
$1.44 per 1,000 sqft
Instructions:
Make 2 sequential applications of 1.0 fl. oz. (0.51 lb. AI/A) of Quinclorac 1.5L Select per 1,000 sq. ft. and an additional sequential application up to 0.90 fl. oz. (0.46 lb. AI/A) of Quinclorac 1.5L Select per 1,000 sq. ft. at 14- to 21-day intervals.
