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Product: Bordeaux Mixture (Copper Sulfate + Calcium Hydroxide)

Brand:

Category: Pesticides

Subcategory: Fungicides

Bordeaux Mixture (Copper Sulfate + Calcium Hydroxide)

Bordeaux Mixture (Copper Sulfate + Calcium Hydroxide)
Trade Name: Bordeaux Fix
Group: Inorganic
Mode of Action: Copper-based protective fungicide absorbed through leaves, inhibits fungal growth
Type: Contact, protective, preventive, and curative fungicide and bactericide
Toxicity: Safe for bees; toxic to fish
Pre-harvest Interval (PHI): 7 days

Crops and Application Rates:

Crop

Disease

Application Rate

Pome and Stone fruits

Canker (1–2-year-old)

HV: 1 kg CuSO₄·5H₂O + 1.25 kg Ca(OH)₂ in 100 L water; LV: 4 kg CuSO₄·5H₂O + 2 kg Ca(OH)₂ in 100 L water

Stone fruits

Shot Hole Disease

HV: 1 kg CuSO₄·5H₂O + 1.25 kg Ca(OH)₂ in 100 L water; LV: 4 kg CuSO₄·5H₂O + 2 kg Ca(OH)₂ in 100 L water

Peach

Leaf Curl

HV: 1 kg CuSO₄·5H₂O + 1.25 kg Ca(OH)₂ in 100 L water; LV: 4 kg CuSO₄·5H₂O + 2 kg Ca(OH)₂ in 100 L water

Almond

Rust (Brick Spot)

10 g/L (3 sprays)

Application Management:

  • Test before wide use; avoid mixing with organophosphates.
  • Sensitive varieties (especially peaches) may show leaf burn.
  • Can reduce frost damage by controlling ice-nucleating bacteria.