The label is the law. Rates and restrictions below are taken from the product labels listed under Sources. Your product's own label governs; read it before you mix or apply. Mixing calculator · Disclaimer
- Active ingredient
- Azoxystrobin
- Chemical class
- Methoxy-acrylate strobilurin; FRAC Group 11 QoI fungicides (quinone outside inhibitors).[2]
- Mode of action
- FRAC Group 11: QoI fungicides (quinone outside inhibitors): methoxy-acrylates[2]
- Signal word
- Heritage Fungicide: Caution[1]
Spray limits and rotation
On turf, make no more than two Heritage sprays in a row for gray leaf spot or Pythium, and no more than three in a row for other diseases. Then switch to a different fungicide group.[1]
FRAC places azoxystrobin in Group 11 with the other QoI fungicides. The label warns that fungi resistant to one Group 11 product may also resist others, and says not to alternate Heritage with other strobilurins.[2][1]
Yearly and per-spray caps
No more than 10 lb of Heritage per acre per year outdoors and no more than 1.1 lb per acre in one application. With handheld equipment the spray can't exceed 0.0025 lb of active ingredient per gallon.[1]
Where it is used
Treat before disease shows up. The label says Heritage should be applied prior to disease development, and calls rescue use on already-sick ornamentals not recommended.[1]
It does not control dollar spot. Where dollar spot is likely, tank-mix it with a fungicide labeled for that disease.[1]
Keep it far from apple, crabapple and flowering cherry. Even trace amounts left in a sprayer can badly injure some varieties, so don't use the same equipment on those trees.[1]
Skip spraying when rain or irrigation is expected within 48 hours; that cuts runoff. A grass buffer strip next to ponds and streams also helps.[1]
Products and registrations
| Product | Registrant | EPA Reg. No. | Active % | Formulation | Signal word |
|---|---|---|---|---|---|
| Heritage Fungicide[1] | Syngenta Crop Protection, LLC | 100-1093 | 50.0% | water-dispersible granule | Caution |
Label rates
| Product | Use | Pests | Rate |
|---|---|---|---|
| Heritage Fungicide | Lawns, golf courses, parks, athletic fields and sod farms | Brown patch, large patch, gray leaf spot, Pythium blight, fairy ring, summer patch, take-all patch, snow molds, rusts and other turf diseases | 0.2–0.4 oz product per 1,000 sq ft[1] Mix in 2 to 4 gallons of water per 1,000 sq ft. Most diseases are on 14- to 28-day intervals; Pythium blight is every 10 to 14 days. Fairy ring, snow molds and take-all root rot use the full 0.4 oz. |
| Heritage Fungicide | Ornamentals in nurseries, greenhouses, interiorscapes and landscapes | Leaf spots and blights, anthracnose, powdery and downy mildew, rusts, rose blackspot, Botrytis blight (suppression) | 1–8 oz product per 100 gallons of water[1] Most diseases take 1 to 4 oz per 100 gallons every 7 to 28 days. Rose blackspot takes 4 to 8 oz every 7 to 14 days. Spray to the point of runoff. |
Safety and environmental hazards
People
Signal word CAUTION: harmful if absorbed through skin and causes moderate eye irritation. Applicators wear long sleeves, long pants, shoes with socks, and chemical-resistant gloves of PVC, nitrile or butyl rubber.[1]
Pets
On lawns and landscapes, don't treat while unprotected people or domestic animals are present, and keep everyone off until the treated area is dry. Don't graze animals on treated turf or feed them the clippings.[1]
Bees and pollinators
Heritage carries no bee hazard statement. Its environmental warnings center on fish, aquatic invertebrates and water quality.[1]
Fish and water
Toxic to freshwater and saltwater fish and aquatic invertebrates, and it can persist for several months. It can leach to groundwater in permeable soils and has a high potential to reach surface water through runoff.[1]
Common questions
- How much Heritage per 1,000 square feet?
- 0.2 to 0.4 oz of product per 1,000 sq ft, mixed in 2 to 4 gallons of water. For a spot treatment, the label uses 0.2 oz in 1 to 3 gallons of water.[1]
- Does azoxystrobin control brown patch and large patch?
- Yes. Both are on the turf table at 0.2 to 0.4 oz per 1,000 sq ft every 14 to 28 days, with large patch usually treated in fall.[1]
- Can I spray Heritage near my apple tree?
- No. The label says it is highly phytotoxic to apple and certain crabapple and flowering cherry varieties, and forbids spraying where drift could reach them.[1]
Sources
- U.S. EPA Pesticide Product Label System, “Heritage Fungicide label, EPA Reg. No. 100-1093 (EPA-stamped, July 28, 2025).” www3.epa.gov/pesticides/chem_search/ppls/000100-01093-20250728.pdf (accessed 2026-10-06)
- Fungicide Resistance Action Committee, “FRAC Code List 2025.” www.frac.info/media/ljsi3qrv/frac-code-list-2025.pdf (accessed 2026-10-06)