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

  1. Calculate area: Measure acres precisely (43,560 sq ft = 1 acre).
  2. 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).
  3. Add surfactant: Use 0.25-0.5% v/v (e.g., 4-8 oz per 10 gallons).
  4. Spray evenly: Use flat-fan nozzles (e.g., TeeJet 8002) at 20-30 PSI for uniform coverage.
  5. 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