Reliant Systemic Fungicide quart (32 oz)

Reliant Systemic Fungicide is a professional-grade phosphite fungicide designed for broad-spectrum disease control in turf, ornamentals, nursery crops, landscapes, and forestry applications. Formulated with a low salt index and free from sodium, ammonium, and aluminum co-products, Reliant delivers effective systemic disease management while supporting overall plant health and stress tolerance. Reliant works as both a fungicide and plant health stimulant by translocating throughout the plant to suppress diseases such as Phytophthora, Pythium, downy mildew, and other labeled pathogens. In addition to direct disease suppression, Reliant stimulates natural phytoalexin production to enhance plant immune response and strengthen resistance against disease pressure. Its flexible application options include foliar sprays, root drenches, soil applications, and chemigation, making it an excellent fit for professional disease management programs. Often used as a replacement for Agri-Fos, Reliant has become a trusted solution for revitalizing stressed or declining trees, ornamentals, and turfgrass while improving overall plant vigor and root health.

Features & Benefits

• ✅ Systemic phosphite fungicide for turf, ornamentals, nursery, and forestry use
• ✅ Broad-spectrum control of Phytophthora, Pythium, downy mildew, and other labeled diseases
• ✅ Stimulates phytoalexin production to strengthen plant immune response
• ✅ Provides potassium nutrition to support plant health and vigor
• ✅ Low salt index formulation contains no sodium, ammonium, or aluminum co-products
• ✅ Flexible applications including foliar spray, root drench, soil treatment, and chemigation
• ✅ Tank-mix compatible with most pesticides except certain copper products
• ✅ Reduced-risk fungicide with a 4-hour REI and zero-day pre-harvest interval
• ✅ Excellent replacement for Agri-Fos phosphite fungicide programs

Use Sites

Turfgrass, golf courses, lawns, sports turf, ornamentals, landscapes, nurseries, greenhouses, forestry sites, trees, shrubs, parks, commercial landscapes, and other labeled agricultural and horticultural sites.

Target Diseases

Phytophthora, Pythium, downy mildew, root rot, crown rot, stem diseases, damping off, and other labeled water mold and fungal diseases.

Application Notes

Reliant may be applied as a foliar spray, soil drench, root zone treatment, trunk injection, basal bark treatment, or through chemigation systems depending on the labeled crop and disease target. For best results, apply preventatively or at the earliest stages of disease development as part of a complete disease management program.

Product Information

Active Ingredient: Phosphorous Acid (phosphite)
FRAC Group: P07
Formulation: Liquid Systemic Fungicide
REI: 4 Hours
PHI: Zero-Day Pre-Harvest Interval

• Fungicide: Kills pathogens on contact, in soil, and on plants
• Nutrient: Strengthens plant health with potassium
• Stimulant: Enhances immune response for disease resistance
• Broad-spectrum control: Effective against Phytophthora, Pythium, downy mildew & more
• Flexible applications: Use as root drench, foliar spray, or chemigation
• Reduced-risk: 4-hour REI & zero-day pre-harvest interval
• Tank-mix friendly: Compatible with most pesticides (except certain copper products)

ACTIVE INGREDIENT	Mono- and di-potassium salts of Phophorous Acid 45.8%
TARGET PESTS	Phytophthora, Phytophthora ramorum (SOD), pythium, apple scab and many other plant pathogens
FOR USE IN	Turfgrass, Christmas trees, fruits and vegetables, citrus, bedding plants and greenhouse-grown plants
MANUFACTURER	Quest Products

Label	View
SDS	View
Additional Information	View