
Prime Source Quinclorac 1.5L Select
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Product Information
Prime Source Quinclorac 1.5 L Select
Use Prime Source's Quinclorac 1.5 L Select to control various broadleaf and grassy weeds. This selective, post-emergent herbicide may be safely applied to cool types of turfs (residential and non-residential turfs). You can use Quinclorac 1.5 L Select from seven days before seeding to up to twenty-eight days after the selected weeds have emerged.
Top Benefits
- Up to 90 day control
- Works on both broadleaf and grassy weeds
- Selective control means it doesn’t harm turf
- Controls Crabgrass
Turf Tolerance (Established)
Highly Tolerant | Moderately Tolerant | Susceptible |
Bermudagrass, common1 Bluegrass, annual Bluegrass, Kentucky Buffalograss Fescue, tall Ryegrass, annual Ryegrass, perennia | Bentgrass, creeping1 Bermudagrass, hybrid1 Bluegrass, rough (Poa trivialis) Fescue, Chewing’s Fescue, fine2 Fescue, hard Fescue, red Paspalum, seashore | Bahiagrass Bentgrass, colonial Bentgrass, seaside Centipedegrass Dichondra St. Augustinegrass |
1Yellowing 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).
2 Apply Quinclorac 1.5L Select herbicide to fine fescue only when it is part of a blend.
DO NOT use on golf course greens and collars.
Consult Table 4. Seeding/Overseeding/Sprigging Timing Chart for this situation.
Manufacturer: Prime Source


Application-Quinclorac 1.5 L Select Herbicide Rate
- Broadcast Applications: 64 fl. ozs. of product per acre or 1.45 fl. ozs. per 1,000 sq. ft
- Spot Applications: Apply 1.45 fl. ozs. of Quinclorac 1.5L Select per 1,000 sq. ft. (0.75 lb. AI/A) of treated area.
- For best results add methylated seed oil at 0.55 fl. oz. per 1,000 sq. ft
- See label for complete instructions.
Packaging | 7.5 oz and 1/2 Gallon | ||
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Product Label | Label | ||
Safety Data Sheet | SDS | ||
More PDF's | Sales Sheet | ||
Target Pest |
1Â 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. 2Â Tank mix partner or sequential application required. 3Â 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. 4Â 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. 5Â NOT FOR USE to control this weed in California. |
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Active Ingredient(s) | Quinclorac . . . . . . . 18.92% | ||
For Use In |
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Yield | N/A | ||
Mixture | N/A | ||
Not Available for Purchase In | AK,AZ,HI,WY,CT,NY |