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Q4 Plus Turf Herbicide for Grassy and Broadleaf Weeds is a weed killer that contains four powerful active ingredients – quinclorac, sulfentrazone, 2,4-D, and dicamba. This combination controls crabgrass, yellow nutsedge, and broadleaf weeds making it a versatile all-in-one product. Q4 Plus is highly selective on cool-season turf grasses. It is labeled for use on turf species including bluegrasses, ryegrass, tall fescues, and bermudagrass. Q4 Plus herbicide is rain-fast in 6 hours and has a 4 week reseeding interval.
Per the product label: Turfgrass tolerance to this product may vary and temporary turfgrass yellowing may occur on fine fescues, Bermudagrass, and zoysiagrass (see specific Bermudagrass and zoysiagrass sections). Apply only to fine fescue when it is part of a mixed stand of cool-season turf/cool-season blends. Tolerant turf species listed on this label may exhibit temporary turf injury. The best tolerance occurs under optimal conditions for the turfgrass.
For use in California: Biotypes of large and smooth crabgrass in California have shown varied response to this product. If control failure occurs following a full or split application, DO NOT reapply this product. Change to a herbicide with a different mode of action.
Product Documents
| Active Ingredient | 2,4-D, dimethylamine salt 11.81%, Dicamba, dimethylamine salt 1.49%, Quinclorac 8.43%, Sulfentrazone 0.69% |
|---|---|
| Target pests |
Barnyard grass, Bull Thistle, Chickweed, Clovers, Crabgrass (large & smooth), Dandelion, Nutsedge yellow, Signalgrass and others * See label for complete list |
| For use in |
Golf Courses, Commercial and Residential Lawns, Cemeteries, Public Parks, Sports Turf, Sod Farms and others * See label for complete list |
| Application |
Cool Season Grasses: 2.6 - 3 oz. per 1,000 sq. ft. (7 - 8 pints per acre) Warm Season Grasses: 1.8 - 2.6 oz. per 1,000 sq. ft. (5 - 7 pints per acre) * See label for complete application instructions |
| Pet safe | Yes, if used as directed on label |
| Formulation | Professional Product |
| NOT FOR SALE TO |
AK, HI, PR MA, NY (Restricted To Licensed Applicators Only) CA, LA,TX (1 & 2.5 Gallon Sizes Restricted To Licensed Applicators Only) WA (2.5 Gallon Size Restricted To Licensed Applicators Only) |
| Shipping Weight | 2.55 lbs |
| Manufacturer | PBI Gordon Corporation |
| UPC | 070251697878 |
| EPA Registration | 2217-930 |
Post Emergent Control of Grassy Weeds
Q4 Plus Turf Herbicide for Grassy & Broadleaf Weeds can provide post-emergent control and suppression of the grassy weeds listed. Apply to weeds during the growth stages. Applications under adequate soil moisture conditions are preferred. Early summer treatments are generally more effective. Applications in the summer (approximately July 15 to August 15) to older, drought stressed grassy weeds are less effective. Late summer applications (after August 15) to mature crabgrass can be very effective. Weed control is affected by the spray volume, timing and the weed growth stages.
Post Emergent Control of Broadleaf Weeds
Apply this product to broadleaf weeds that are young and actively growing for the best results. Spring and fall treatments under adequate soil moisture conditions are preferred to the summer treatments. Generally, summer broadcast applications to older, drought stressed weeds are less effective. Fall applications provide improved control for emerged winter annuals and perennials such as henbit, chickweed, clover and ground ivy.
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Q4 Plus Turf Herbicide
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