Skip to content
  • 💸 Don't miss out on 20-40% off! 💸
  • 💸 Don't miss out on 20-40% off! 💸
Garden-green plant growth careGarden-green plant growth care
  • Menu
    • No products in the cart.

      Return to shop

  • Cart

    No products in the cart.

    Return to shop

  • Nursery Supplies
    • Nursery Pots
    • Plant Supports
    • Weed Control
    • Ground Cover
    • Soilless Mix
  • Greenhouse Supplies
    • Greenhouse Accessories
    • Greenhouse Plastic & Poly Film
    • Seed Trays
    • Hydroponic Supplies
    • Seed Starting Supplies
    • Shade Cloth & Fabric
    • Grow Lights & Accessories
    • Plant Covers
  • Fertilizers
    • Soil Amendments
    • Slow Release Fertilizer
    • Lawn & Grass Fertilizer
    • Organic Fertilizer
    • Water Soluble Fertilizer
    • Plant and Flower Fertilizer
    • Rooting Hormone
    • Anti-Transpirant
  • Field Production
    • Tying & Securing
    • Burlap
    • Field Staking
    • Baskets
    • Tree Guards & Wraps
    • Grafting Tools & Supplies
    • Orchard & Harvesting
    • Tree Shelters
  • Herbicide Insecticide
    • Insecticides
    • Post-Emergent Herbicides
    • Fungicides
    • Arbor care
    • Herbicide Surfactants
    • Pre-Emergent Herbicides
    • Pond Supplies
    • Lawn Weed Control
 

Reliant Systemic Fungicide 2.5 Gallon

Home / Herbicide Insecticide / Fungicides
  • Leonard Bio-Targetâ„¢ Insect, Slug, & Snail -Garden-green plant growth care vp biotarget 4
  • Nonionic Surfactant 100% 1 Gallon Concentrate -Garden-green plant growth care ns128
New
Reliant Systemic Fungicide 2.5 Gallon

$208.41 Original price was: $208.41.$98.99Current price is: $98.99.

Buy Now
SKU: YW1SZ 421666036 Categories: Fungicides, Herbicide Insecticide
  • The quality you expect, the service you deserve.
  • Unbeatable Quality, Unbeatable Value
  • Get the Best for Less
  • Buy Quality, Live Better
Browse
  • Fertilizers
    • Anti-Transpirant
    • Lawn & Grass Fertilizer
    • Organic Fertilizer
    • Plant and Flower Fertilizer
    • Rooting Hormone
    • Slow Release Fertilizer
    • Soil Amendments
    • Water Soluble Fertilizer
  • Field Production
    • Baskets
    • Burlap
    • Field Staking
    • Grafting Tools & Supplies
    • Orchard & Harvesting
    • Tree Guards & Wraps
    • Tree Shelters
    • Tying & Securing
  • Greenhouse Supplies
    • Greenhouse Accessories
    • Greenhouse Plastic & Poly Film
    • Grow Lights & Accessories
    • Hydroponic Supplies
    • Plant Covers
    • Seed Starting Supplies
    • Seed Trays
    • Shade Cloth & Fabric
  • Herbicide Insecticide
    • Arbor care
    • Fungicides
    • Herbicide Surfactants
    • Insecticides
    • Lawn Weed Control
    • Pond Supplies
    • Post-Emergent Herbicides
    • Pre-Emergent Herbicides
  • Nursery Supplies
    • Ground Cover
    • Nursery Pots
    • Plant Supports
    • Soilless Mix
    • Weed Control
  • Description
  • Reviews (0)

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 2.5 gallons 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.

Product Specs
  • Active ingredients: Mono and di-potassium salts of phosphorous acid (45.8%)
  • Container volume (gallon): 2.5
  • 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
Product Warranty Information

Reliant Systemic Fungicide 2.5 Gallon -Garden-green plant growth care Down to Earth Guarantee web 2

  • This product is covered under A.M. Leonard’s exclusive 30-Day Down to Earth Guarantee. Click Here for more Details.
Product Features
  • Systemic fungicide
  • Contains mono- and di-potassium salts of phosphorous acid
  • Combined preventative and curative spray
  • Multiple application methods
Product Benefits
  • 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
Frequently Asked Questions
1. What is Reliant Systemic Fungicide?
Reliant Systemic Fungicide is a 2.5-gallon container that contains mono and di potassium salts of phosphorous acid (45.8%). It is a systemic fungicide that works on vegetables, citrus, fruit and nut trees, ornamentals, landscaping, turf, conifers, and bedding plants. It aids healthy plants resist disease and helps affected plants fight off disease while protecting new growth.

2. What diseases does Reliant Systemic Fungicide control?
Reliant Systemic Fungicide controls diseases caused by the pathogen phytophthora such as sudden oak death (SOD), downy mildew, pythium, root rot, and fire blight.

3. In what ways can Reliant Systemic Fungicide be applied?
Reliant Systemic Fungicide can be applied as a soil drench, foliar spray, soil incorporation, basal bark treatment, or as a bare root dip. The application rates vary depending on the crop and application, so it is important to thoroughly review the product label for instructions.

4. Can Reliant Systemic Fungicide be used as both a preventative and curative?
Yes, Reliant Systemic Fungicide works as both a preventative and curative. Apply it to healthy plants to help them resist disease, and for affected plants, it helps the plant kill the invasion while protecting new growth. The fast-acting formula increases plant survival rates.

Additional Product Information
  • SDS Sheet
  • Label

Reviews

There are no reviews yet.

Be the first to review “Reliant Systemic Fungicide 2.5 Gallon” Cancel reply

Related products

New
Triad Select Herbicide
Quick View

Herbicide Insecticide

Triad Select Herbicide

$28.49 Original price was: $28.49.$19.94Current price is: $19.94.
New
Leonard Disease ShieldCopper Soap, 1 Quart
Quick View

Fungicides

Leonard Disease ShieldCopper Soap, 1 Quart

$13.65 Original price was: $13.65.$9.56Current price is: $9.56.
New
Monterey Complete Disease Control Biofungicide/Bactericide Concentrate, 64 Ounces
Quick View

Fungicides

Monterey Complete Disease Control Biofungicide/Bactericide Concentrate, 64 Ounces

$124.95 Original price was: $124.95.$87.47Current price is: $87.47.
New
UP Star Gold Insecticide, 1 Gallon
Quick View

Herbicide Insecticide

UP Star Gold Insecticide, 1 Gallon

$112.05 Original price was: $112.05.$78.44Current price is: $78.44.
New
GrassOut Max Post Emergent Liquid Herbicide
Quick View

Herbicide Insecticide

GrassOut Max Post Emergent Liquid Herbicide

$51.93 Original price was: $51.93.$36.35Current price is: $36.35.
New
Copperhead Herbicide Shells For Ez-Ject Herbicide System
Quick View

Herbicide Insecticide

Copperhead Herbicide Shells For Ez-Ject Herbicide System

$331.90 Original price was: $331.90.$95.99Current price is: $95.99.
New
Acephate PRO 97 Systemic Insecticide, 1 Lb Bag
Quick View

Herbicide Insecticide

Acephate PRO 97 Systemic Insecticide, 1 Lb Bag

$24.35 Original price was: $24.35.$17.05Current price is: $17.05.
New
Monterey B.t. Biological Insecticide Ready To Use Spray, 32 Ounces
Quick View

Herbicide Insecticide

Monterey B.t. Biological Insecticide Ready To Use Spray, 32 Ounces

$29.30 Original price was: $29.30.$20.51Current price is: $20.51.
OUR SHOP
  • My account
  • Checkout
  • Cart
  • Payment Method
CONTACT
  • About Us
  • Contact Us
  • FAQ
  • Returns & Exchanges
CUSTOMER SERVICES
  • Privacy Policy
  • Shipping & Returns
  • Delivery
  • Term and Conditions
STAY IN TOUCH

Sign up for exclusive offers, original stories, events and more.

    Copyright 2026 © www.plantbestsellers.com
    • Nursery Supplies
      • Nursery Pots
      • Plant Supports
      • Weed Control
      • Ground Cover
      • Soilless Mix
    • Greenhouse Supplies
      • Greenhouse Accessories
      • Greenhouse Plastic & Poly Film
      • Seed Trays
      • Hydroponic Supplies
      • Seed Starting Supplies
      • Shade Cloth & Fabric
      • Grow Lights & Accessories
      • Plant Covers
    • Fertilizers
      • Soil Amendments
      • Slow Release Fertilizer
      • Lawn & Grass Fertilizer
      • Organic Fertilizer
      • Water Soluble Fertilizer
      • Plant and Flower Fertilizer
      • Rooting Hormone
      • Anti-Transpirant
    • Field Production
      • Tying & Securing
      • Burlap
      • Field Staking
      • Baskets
      • Tree Guards & Wraps
      • Grafting Tools & Supplies
      • Orchard & Harvesting
      • Tree Shelters
    • Herbicide Insecticide
      • Insecticides
      • Post-Emergent Herbicides
      • Fungicides
      • Arbor care
      • Herbicide Surfactants
      • Pre-Emergent Herbicides
      • Pond Supplies
      • Lawn Weed Control
    • Login

    Login

    Lost your password?

    Register

    Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy.