Quinclorac Herbicide – Liquid & Granular Weed Killer for Agriculture

Product Overview

What Is Quinclorac Herbicide Used For?

Quinclorac is a powerful selective herbicide used to control both grassy and broadleaf weeds—especially where conventional herbicides may underperform. Its mode of action as a synthetic auxin makes it highly effective against tough invaders like:

• Crabgrass (mature and emerging)

• Torpedo grass

• Barnyard grass

• Wild violets

Key Benefits:

• Works as pre-emergent and post-emergent

• Controls both annual and perennial weeds

• Compatible with herbicide tank mixes

• Trusted in agriculture, turfgrass, and industrial applications

Available Formulations & Concentrations

We manufacture Quinclorac in various technical and commercial-grade formulations, tailored for specific application environments:

Technical & Liquid Formulations

• Quinclorac 250 g/L SC
  Suspension concentrate for fast, uniform coverage. Ideal for pre/post-emergent use.

• Quinclorac 75% DF / WDG
  Water-dispersible granule with excellent storage stability and easy handling.

Other Available Grades:

• Quinclorac 10%, 25%, 45%, 50%, 60%, 75% WP

• Quinclorac 50% SG

• Quinclorac 50%, 75%, 90% WDG

• Quinclorac 21.6%, 25%, 30%, 350 g/L SC

• Quinclorac 96% TC

Popular Combination Products

We also offer premixed herbicide formulations that increase the control spectrum:

We offer custom blending and formulation development per your registration needs.

Weed Control Spectrum & Mode of Action

Quinclorac is absorbed through both roots and leaves and disrupts weed growth by mimicking natural plant hormones (auxins). This causes abnormal cell elongation, leaf curling, chlorosis, and eventual death.

Controls Both Grasses & Broadleaf Species:

• Crabgrass (smooth & large)

• Torpedo grass

• Barnyard grass

• Switchgrass

• Wild violets

• Dallisgrass (suppression)

• Clover (partial in turf)

• False pimpernel, sedges (in rice)

Fast visible effects within 3–7 days, with full control in 7–14 days post-application.

Application by Crop & Environment

Rice Cultivation

• Controls barnyard grass and sedges in flooded paddy fields

• Maintains residual activity in water for 5–7 days

Wheat & Corn

• Controls early-season weeds like crabgrass and switchgrass

• Protects crop emergence and yield potential

Turfgrass & Lawns

• Controls mature crabgrass without harming Kentucky bluegrass or bermudagrass

• Ideal for residential lawns, golf courses, athletic fields

Non-Crop Areas

• Utility corridors, railways, roadsides, parks

• Low re-entry interval; suitable for public spaces

Application Guidelines & Dosage

Timing:

• Apply at early post-emergence stage for best results

• In turf, use when weeds are at the 1–3 tiller stage

Water Management (in Rice):

• Keep 3–5 cm of standing water for 5–7 days post-application

Recommended Dosage (Per Hectare):

Mixing & Spraying:

• Use flat fan nozzle sprayers at 40–50 psi

• Apply using a two-step dilution for optimal tank mix

• Avoid mixing with alkaline substances

Apply once per crop cycle to minimize resistance risk.

General Information

1. What is Quinclorac?
   Quinclorac is a selective post-emergent herbicide in the synthetic auxin family. It disrupts weed growth by interfering with plant hormones.

2. What is Quinclorac Herbicide Used For?
   It’s used to control crabgrass, barnyard grass, wild violets, and other tough weeds in rice, corn, wheat, and turfgrass.

3. How Does Quinclorac Work?
   Quinclorac is absorbed by leaves and roots. It disrupts auxin transport, causing abnormal growth, yellowing, wilting, and eventual plant death.

Application and Usage

4. How to Apply Quinclorac?
   Use flat fan nozzles for uniform spray. In rice paddies, keep a shallow water level for 5–7 days after application.

5. How to Mix Quinclorac?
   Use the two-step method: dilute in half the water, stir well, then add the remaining water before spraying.

6. How Much Quinclorac Per Gallon of Water?
   Typically, use 0.367 ounces (10.4 grams) per gallon. Always refer to the product label for precise dosage.

7. How Much Quinclorac Per Acre?
   Apply 4–8 grams per acre (10–20 grams per hectare), based on weed type and crop.

8. How Long After Applying Quinclorac Can I Seed?
   Wait 7–14 days before overseeding or planting new grass to avoid interfering with germination.

9. Can You Mix Quinclorac with 2,4-D?
   Yes. This combo enhances control of both grassy and broadleaf weeds, especially in turfgrass management.

Effectiveness and Timing

10. How Long Does Quinclorac Take to Work?
    Yellowing starts in 3–7 days; full weed control typically occurs in 10–14 days.

11. How Long Does It Take to Kill Crabgrass?
    Usually 7–14 days depending on growth stage and weather conditions.

12. Will Quinclorac Kill Mature Crabgrass?
    Yes. It effectively controls crabgrass at all growth stages, even after tillering.

Weed Control Specifics

13. What Weeds Does Quinclorac Kill?

    • Crabgrass

    • Barnyard grass

    • Torpedo grass

    • Wild violets

    • Clover

    • Some sedges (limited)

    • Suppresses dallisgrass

14. Does Quinclorac Kill Crabgrass?
    Yes, it’s one of the most effective options for post-emergent crabgrass control.

15. Does Quinclorac Kill Clover?
    It may suppress clover, but for full control, mix it with a dedicated broadleaf herbicide.

16. Does Quinclorac Kill Nutsedge?
    No, control is limited. Use a sedge-specific herbicide for better results.

17. Does Quinclorac Kill Dallisgrass?
    It can suppress early-stage dallisgrass. Use in combination with other herbicides for full control.

18. Does Quinclorac Kill Wild Violets?
    Yes, especially when applied early in the growth stage.

19. Does Quinclorac Kill Grass?
    It selectively kills weedy grasses (e.g., crabgrass, torpedo grass) without harming desirable turf when used correctly.

Safety Information

20. Is Quinclorac Safe?
    Yes, when used as directed and with standard safety precautions. Follow the product label closely.

21. Is Quinclorac Safe for Bermuda Grass?
    Yes, it’s generally safe for established Bermuda grass. Avoid applying to new or recently seeded turf.

22. Is Quinclorac Safe for Dogs and Pets?
    Yes. Keep pets off treated areas during application and until the surface is dry. Once dried, it is safe for animals.