Ridomil Gold Copper

Syngenta · Copper 39.1% · EPA Reg 100-804 · Insecticide Document last checked 2026-05-30

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According to the label From the product label

These details were extracted from this product's label PDF. The label is the law. Confirm every rate, site, restriction and safety requirement against the label before mixing or applying. Check for a state supplemental label; a product may be restricted or prohibited in a state or site even when a rate appears below. · EPA registration data for Reg. 100-804 →

Ridomil Gold Copper is a wettable powder fungicide used to control various diseases in listed fruits and vegetables. It contains two active ingredients: Metalaxyl (0.5%) and Copper Hydroxide (80.0%). This product is effective against Oomycete fungi, including downy mildew and various root/stem rots. It can be applied via foliar spray, soil drench, or through irrigation systems. When using irrigation systems, ensure the system is flushed with water within one hour of application to prevent product buildup. Users must follow specific drift management protocols, especially when applying aerially, to protect non-target areas. This product is a Group 1 fungicide (for metalaxyl) and a Group M01 fungicide (for copper hydroxide). Always check for specific crop restrictions and pre-harvest intervals (PHI) as they vary by plant type.

Pests covered (1)

Oomycete fungi (e.g., downy mildew, root/stem rots)

Areas treatable (1)

Fruits and vegetables

Application instructions from the label 1

Fruits and vegetables

Can be applied via foliar spray, soil drench, or irrigation systems.

Target pest: Oomycete fungi (e.g., downy mildew, root/stem rots)
Location: Outdoor

Mixing instructions 1

For pests	Label notes
General fungal control	Must be dissolved completely in water before adding to the tank. Do not use insoluble additives like Solu-Gel.

Worker safety

PPE required Wear long-sleeved shirt, long pants, shoes plus socks, and chemical-resistant gloves (nitrile, neoprene, or Viton). Wear protective eyewear such as goggles or face shields. Avoid breathing dust or spray mist.

Timing & weather

Avoid application during temperature inversions.
Avoid application in windy conditions to prevent drift.

Use restrictions 3

Do not apply when weather conditions favor drift.
Do not use in greenhouses or hydroponic systems unless specifically noted for that crop.
Follow specific PHI for each crop.

Label SDS

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Document text and citations

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Reference only. Always read and follow the most current EPA-approved label on the product container. State and local restrictions may apply that are not reflected in this digitised copy. Verify the EPA registration number and revision date before use.