Protect your plants from disease!
Reliant Systemic Fungicide contains the active ingredients mono- and di-potassium salts of phosphorous acid (45.8%). This bottle contains 128 ounces (1 gallon) of Reliant. Use Reliant to control diseases caused by the pathogen phytophthora. Diseases associated with this pathogen include sudden oak death (SOD), downy mildew, pythium, root rot, and fire blight.
Reliant works well on vegetables, citrus, fruit and nut trees, ornamentals, landscaping, turf, conifers, and bedding plants. Reliant works as both a preventative and curative. You can use this product as a soil drench, foliar spray, soil incorporation, basal bark treatment, or as a bare root dip. Apply it to healthy plants to help them resist disease.
For affected plants, it helps the plant kill the invasion while protecting new growth. Reliant acts quickly, saving your plants from disease-related damage or death. Combine this product with Pentra-Bark for maximum effectiveness against sudden oak death. Completely review the product label in the links section below for application rates. Rates vary depending on the crop and application.
- Active ingredients: Mono and di-potassium salts of phosphorous acid (45.8%)
- Container volume (ounces): 128
- Application type: Soil drench, foliar spray, soil incorporation, basal bark treatment, or bare root dip
- Key diseases: Sudden oak death (SOD), downy mildew, pythium, root rot, and fire blight

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- Systemic fungicide
- Contains mono- and di-potassium salts of phosphorous acid
- Combined preventative and curative spray
- Multiple application methods
- Controls diseases caused by the pathogen phytophthora
- Works on vegetables, citrus, fruit and nut trees, ornamentals, landscaping, turf, conifers, and bedding plants
- Aids healthy plants resist disease
- Helps affected plants fight off disease while protecting new growth
- Fast-acting formula increases plant survival rates
- Pair with Pentra-Bark; for maximum effectiveness against sudden oak death
Reliant Systemic Fungicide is a gallon-sized bottle containing the active ingredients mono and di potassium salts of phosphorous acid (45.8%). It is a fungicide used to control diseases caused by the pathogen phytophthora in various crops, ornamentals, and turf.
What types of plants and diseases does Reliant Systemic Fungicide work on?
Reliant Systemic Fungicide works on vegetables, citrus, fruit and nut trees, ornamentals, landscaping, turf, conifers, and bedding plants. Some of the key diseases it controls are sudden oak death (SOD), downy mildew, pythium, root rot, and fire blight.
How do I apply Reliant Systemic Fungicide?
You can apply Reliant Systemic Fungicide as a soil drench, foliar spray, soil incorporation, basal bark treatment, or bare root dip. The application rate varies depending on the crop and method. Please review the product label carefully for specific application rates.
Can Reliant Systemic Fungicide be used as a preventative and curative?
Yes, Reliant Systemic Fungicide can be used as both a preventative and curative. It can help healthy plants resist disease and help affected plants fight off disease while protecting new growth. Its fast-acting formula increases plant survival rates.
- Product Label
- SDS







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