Use 0.125 to 0.25 lbs of clethodim per acre for clover control
Clethodim effectively suppresses clover at 0.125-0.25 lbs active ingredient (ai) per acre. Apply with a non-ionic surfactant (0.25-0.5% v/v) for best results. Timing matters: spray when clover is actively growing (3-6 inches tall) and avoid mowing 7 days before/after. Always check label rates for specific clover types.
Key Factors Affecting Clethodim Rates
- Clover species: White clover may require lower rates (0.125 lbs/acre); crimson or red clover often needs 0.25 lbs/acre.
- Growth stage: Young, tender clover absorbs herbicide better than mature plants.
- Weather conditions: Apply in calm winds (≤10 mph) with no rain expected for 6-12 hours.
- Tank mix partners: Avoid mixing with glyphosate or 2,4-D unless label-approved.
Clethodim Application Rates by Clover Type
| Clover Type |
Clethodim Rate (lbs ai/acre) |
Surfactant Rate (% v/v) |
Best Application Time |
| White Clover |
0.125-0.187 |
0.25-0.5 |
Early bloom stage |
| Red/Crimson Clover |
0.187-0.25 |
0.5 |
Pre-bloom, 4-6 inches tall |
| Alsike Clover |
0.25 |
0.5 |
Active growth, before seed set |
Step-by-Step Application Guide
- Calculate area: Measure acres precisely (43,560 sq ft = 1 acre).
- Mix herbicide:
- For 0.125 lbs ai/acre: Add 8 oz of 2 lbs/gallon clethodim per 10 gallons of water.
- For 0.25 lbs ai/acre: Double the rate (16 oz per 10 gallons).
- Add surfactant: Use 0.25-0.5% v/v (e.g., 4-8 oz per 10 gallons).
- Spray evenly: Use flat-fan nozzles (e.g., TeeJet 8002) at 20-30 PSI for uniform coverage.
- Post-application: Avoid grazing/livestock exposure for 7-14 days (check label).
Safety and Environmental Precautions
- Personal protective equipment (PPE): Wear long sleeves, gloves, goggles, and a respirator if mixing concentrates.
- Avoid drift: Use drift-reduction nozzles near sensitive crops (e.g., legumes, vegetables).
- Water bodies: Maintain a 66-foot buffer from streams/ponds to protect aquatic life.
- Resistance management: Rotate herbicides (e.g., flumioxazin or carfentrazone) to prevent resistance.
Alternatives to Clethodim for Clover Control
| Herbicide |
Rate (per acre) |
Pros |
Cons |
| Flumioxazin |
0.06-0.12 lbs ai |
Pre-emergent option; long residual |
Requires rainfall for activation |
| Triclopyr |
0.5-1 lb ai |
Effective on woody clovers |
Risk to nearby broadleaf crops |
| Mowing |
N/A |
Non-chemical; reduces seed production |
Temporary; requires frequent repeats |