Size: 2.5 Gallon
Sale price$127.35


Reliant is a reduced-risk fungicide and plant booster, killing disease pathogens on contact while building plant health. It can be used in a variety of sites and combined with most pesticides in an integrated pest management (IPM) program. Reliant kills and controls numerous fungal diseases and doesn't contain harmful ingredients that could pose a risk to other plants or the environment.

How Reliant Fungicide Works

Reliant contains mono- and di-potassium salts of phosphorous acid. It begins to work on contact with the fungal pathogens, halting their growth and killing them within minutes of application. It contains very low salt levels and has zero sodium, ammonium or aluminum, so it's safe to use on most labeled crops without harming nontarget plants. Reliant is a systemic fungicide, so it translocates through the plant system quickly and destroys the pathogens on contact.

Where to Use Reliant Fungicide

Reliant Systemic Fungicide can be used in a variety of sites to combat and prevent fungal diseases. Use it on ornamentals and bedding plants, as well as interiorscapes to protect against mildews and other diseases. It can be used to protect conifers and turfgrass, as well as trees such as oak and beech. It's the perfect fungicide to use in Christmas tree farms and also greenhouse-grown plants. It has three modes of action to knock out fungal infections, to build plant health, and to increase the plant's immune response to diseases.

Target Diseases

Reliant is used to kill fungal pathogens at the moment of contact. It's effective at killing and controlling general root rots such as pythium in the turf. It will also kill phytophthora, apple black spot and scab, as well as collar rot and fire blight. Apply it as a foliar spray to eliminate crown rot or as a root injection to kill root rot. It can be applied as a trunk spray to knock out canker and a foliar spray to get rid of downy mildew.

Benefits of Reliant Systemic Fungicide

Because it has a reduced-risk status, Reliant fungicide is a reliable product for killing fungal pathogens without harming the environment. It has a four-hour re-entry interval and a zero-day pre-harvest interval, so it can be applied up to the day of harvest without concern. Other benefits and features include:

  • Perfect as a tank-mix partner with most pesticides
  • Controls diseases in turf, evergreens, bedding plants and greenhouse plants
  • Doesn't contain sodium, aluminum or ammonium
  • Kills fungal diseases on contact in the soil and on the crop
  • Vital part of any IPM program

Cure and Prevent Fungal Diseases with Reliant

Reliant fungicide circulates throughout the plant, attacking fungal pathogens as it goes. It not only kills the diseases on contact but also acts as a nutrient, providing potassium to the plant for improved health. It's also a stimulant, increasing the plant's antibodies that boost immune response against diseases. Whether it's to combat pythium in the turf or fusarium in conifers, Reliant is a reliable choice when it comes to controlling diseases and increasing plant health.

Manufacturer Quest Products 
Utility  Fungicide
Active Ingredient Mono- and di-potassium salts of Phosphorous Acid
Composition 45.8%
Container Size 2.5 gallons
Application Amount See label for details.



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