Amistar Top

Syngenta · Azoxystrobin · EPA Reg 100-1313 · Fungicide Document last checked 2026-05-30

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. 100-1313 →

Quadris Top is a broad-spectrum fungicide designed for the control of many important plant diseases, specifically targeting leaf spots and powdery mildew. It is a suspension concentrate (SC) formulation containing two active ingredients: Azoxystrobin (18.2%) and Difenoconazole (11.4%). This product provides preventative, systemic, and curative properties. It is applied as a foliar spray and can be used in block, alternating, or tank-mix applications, though specific instructions must be followed for each. When handling, be aware that this product is extremely phytotoxic to certain apple varieties; avoid spraying apple trees or apple fruit. It is also highly toxic to fish, mammals, and aquatic invertebrates, and can be persistent in the environment. To prevent environmental impact, do not apply directly to water or areas where surface water is present. For safe application, technicians must wear long-sleeved shirts, long pants, shoes plus socks, and waterproof gloves. If the product is accidentally inhaled, swallowed, or comes into contact with skin or eyes, follow the specific First Aid instructions provided, which include calling a poison control center or doctor immediately. Always manage spray drift by avoiding windy conditions and high temperatures to protect non-target areas and prevent crop damage.

Pests covered (1)

leaf spots and powdery mildew

Areas treatable (1)

foliar

Application instructions from the label 1

foliar

Extremely phytotoxic to certain apple varieties; avoid spraying apple trees or apple fruit.

Target pest: leaf spots and powdery mildew
Location: Outdoor

Mixing instructions 1

Finished strength	Label notes
suspension concentrate (SC)	Prepare no more spray mixture than is required for immediate operation. Agitate spray solution before and during application.

Worker safety

Re-entry interval (REI) 12

PPE required Long-sleeved shirt and long pants, shoes plus socks, and waterproof gloves.

Timing & weather

Avoid applications during temperature inversions. Avoid applications during gusty wind conditions. Avoid applications when drift or irrigation is expected to occur within 48 hours.

Use restrictions 1

Extremely phytotoxic to certain apple varieties. Do not spray apple trees or apple fruit. Do not apply directly to water or areas where surface water is present. Avoid applications when drift or irrigation is expected to occur within 48 hours. Greenhouse use: for resistance management, do not use for transplant production.

Label SDS

Catalog source document available. The local copy is still withheld until its exact product identity, role, and full file hash are accepted. Open the catalog source label ↗ and verify the product name, EPA registration number, and revision before relying on it.

Publication withheld. This catalog record has no active evidence summary, so its document and any extracted directions remain unavailable while identity and document role are reviewed.

Document text and citations

Extracted text is retained internally for document review and page-level citation checks. The complete third-party text is not republished here; use the document viewer above.

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.