Lawn rust can quickly turn a lush green yard into a patchy, orange-speckled mess. This common fungal disease affects grass health and appearance, especially during periods of drought or poor nutrition.
Fortunately, the right fungicide can help you take back control and restore your lawn’s vitality. In this guide, we’ve reviewed the best lawn rust fungicides available today, from fast-acting chemical treatments to organic, pet-safe solutions.
Whether you’re looking to treat an active outbreak or prevent future issues, these top-rated products will help you maintain a healthy, green lawn all season long. Let’s find the right fungicide for your needs.
1. Scotts DiseaseEx Lawn Fungicide
Scotts DiseaseEx Lawn Fungicide is a fast-acting, broad-spectrum granular fungicide designed to prevent and control 26 common lawn diseases, including brown patch, stem and stripe rust, red thread, powdery mildew, necrotic ring spot, pink patch, and more.
It starts working within 24 hours of application and provides up to 4 weeks of disease control.
The product is suitable for both preventative and curative use and can be applied after seeding or at seed germination.
A 10 lb. bag treats up to 5,000 sq. ft. and is best applied with a Scotts spreader. People and pets may re-enter the treated area after application.
Best for: Homeowners seeking to protect their lawns from a wide range of fungal diseases, especially during periods of high disease pressure or at the first sign of symptoms.
Pros:
- Controls 26 listed lawn diseases
- Starts working within 24 hours
- Preventative and curative action
- Up to 4 weeks of protection
- Safe for people and pets after application
- Easy application with a broadcast or drop spreader
Cons:
- Requires reapplication every 14-28 days for ongoing protection
- Not to be applied directly to water or allowed to run off into water sources
- Effectiveness may vary depending on disease severity and weather conditions
2. Bonide Captain Jack’s Copper Fungicide
Bonide Copper Fungicide Ready-to-Use (RTU), also marketed as Captain Jack’s Liquid Copper Fungicide, is a plant disease control spray approved for organic gardening.
It uses low concentrations of copper (as copper octanoate) to prevent and treat a broad range of fungal and bacterial diseases, including powdery mildew, black spot, rust, downy mildew, blights, leaf spots, fruit rot, late blight, peach leaf curl, and more.
Suitable for use on fruits, vegetables, nuts, herbs, flowers, ornamentals, and even houseplants, it can be applied during both dormant and growing seasons and right up to the day of harvest.
Best for: Gardeners seeking an organic, easy-to-use solution for controlling fungal and bacterial diseases on a wide variety of edible and ornamental plants.
Pros:
- Broad-spectrum control of many common plant diseases
- Approved for organic gardening and safe for use up to harvest
- Ready-to-use spray bottle for convenient application
- Suitable for fruits, vegetables, ornamentals, and houseplants
- Can be used during both dormant and growing seasons
- Safe for people and pets when used as directed
Cons:
- Requires thorough coverage of all plant surfaces for best results
- Repeat applications needed every 7-10 days or after rain
- Not available in some states due to shipping restrictions
- Effectiveness may be reduced in heavy rain or if not reapplied as directed
3. BioAdvanced Fungus Control for Lawns
BioAdvanced Fungus Control for Lawns (32 oz ready-to-spray) is a systemic fungicide formulated to cure and prevent common lawn diseases such as red thread, brown patch, dollar spot, and rust.
It contains propiconazole, which provides long-lasting, weatherproof protection and starts working quickly to protect turf.
The product covers up to 5,000 sq. ft. per bottle and is applied easily via hose-end sprayer, making it convenient for homeowners to maintain healthy lawns.
Best for: Homeowners looking for an effective, easy-to-apply fungicide to manage and prevent a variety of fungal diseases in their lawns.
Pros:
- Controls multiple common lawn diseases
- Systemic action offers up to 1 month of protection
- Ready-to-spray hose-end application for convenience
- Weatherproof formula maintains effectiveness after rain
- Covers up to 5,000 sq. ft. per bottle
Cons:
- Not organic
- Requires reapplication for ongoing protection
- Effectiveness depends on proper application and timing
4. Garden Safe Brand Fungicide
Garden Safe Fungicide3 Ready-to-Use (32 oz) is an organic, multi-purpose spray that acts as a fungicide, insecticide, and miticide in one product.
It contains clarified hydrophobic extract of neem oil (0.09%) and is designed to control fungal diseases such as black spot, rust, powdery mildew, downy mildew, and anthracnose, as well as insect pests including aphids, whiteflies, spider mites, and other listed insects and mites.
Suitable for use on roses, flowers, ornamental trees and shrubs, fruits, and vegetables, it is safe for organic gardening and can be applied up to the day of harvest.
Best for: Gardeners seeking an all-in-one, organic solution to manage fungal diseases, insect pests, and mites on a wide variety of plants in home gardens.
Pros:
- Controls fungal diseases and insect pests simultaneously
- OMRI-listed for organic gardening
- Ready-to-use spray with easy application
- Safe for edible plants and ornamentals
- Kills eggs, larvae, and adult insects and mites
- Can be used preventatively or to treat existing problems
Cons:
- Requires thorough coverage for effectiveness
- Needs reapplication every 7–14 days or after rain
- Potential for leaf burn if applied in direct sunlight
5. Earth’s Ally Fungicide for Lawns
This 2-in-1 folding electric treadmill arrives fully assembled and is ready for immediate use. It is designed for both home and office environments, featuring a quiet 2.25 HP brushless motor with a speed range of 0.5 to 7.5 mph.
The treadmill includes a multi-functional LED display to track speed, distance, time, and calories burned, along with a built-in phone bracket and remote control.
Its foldable design and transportation wheels allow for easy storage and mobility. The sturdy steel frame supports a maximum weight of up to 265 lbs.
The 5-layer shock-absorbing, anti-skid running belt provides cushioning for the back, joints, knees, ankles, and muscles.
Best for: Individuals seeking a compact, space-saving treadmill for walking, jogging, and running at home or in the office.
Pros:
- Fully assembled and ready to use
- Quiet 2.25 HP brushless motor
- Multi-functional LED display and remote control
- Foldable design with transportation wheels for easy storage
- 5-layer shock-absorbing running belt
Cons:
- Maximum speed of 7.5 mph may not be suitable for serious runners
- Weight capacity limited to 265 lbs
- Manual incline
6. Spectracide Immunox Multi-Purpose Fungicide Spray
Spectracide Immunox Multi-Purpose Fungicide Spray Concentrate (16 oz) is a systemic fungicide designed to cure and prevent a wide range of fungal diseases on roses, flowers, ornamental shrubs, lawns, trees, fruits, nuts, and vegetables.
It controls common diseases such as brown patch, powdery mildew, black spot, rust, blights, leaf spot, mold, and scab.
Once dried, it cannot be washed off by rain, providing protection for up to two weeks. The active ingredient is myclobutanil (1.55%), which works systemically to protect plants from within.
Best for: Home gardeners and landscapers looking for an effective, easy-to-use fungicide to prevent and treat fungal diseases on a variety of plants and turf.
Pros:
- Systemic action protects plants internally and externally
- Controls many common fungal diseases
- Rainproof once dry
- Protects for up to two weeks per application
- Suitable for fruits, vegetables, flowers, shrubs, trees, and lawns
- Concentrate allows for customized dilution
Cons:
- Requires early or at-first-sign application for best results
- Needs reapplication every two weeks for ongoing control
- Not for use as a soil drench
- Shipping restrictions apply in some areas
7. Grower’s Ally Fungicide Spray for Plants
Sarasota Green Group offers organic, safe, and effective pest and disease control products under brands like Grower’s Ally and Earth’s Ally.
Their fungicides, such as Grower’s Ally Fungicide, are OMRI Listed® and formulated with food-grade citric acid to kill and prevent powdery mildew and other common plant pathogens.
These products are suitable for use in all growing environments, indoor, outdoor, greenhouse, and hydroponic and can be applied up to the day of harvest without leaving harmful residues.
The company also produces botanical pesticide blends combining rosemary, thyme, and clove oils for insect and mite control.
Sarasota Green Group emphasizes eco-friendly, bee-safe formulations, using recycled packaging and avoiding harsh synthetic chemicals.
Best for: Organic gardeners, commercial hemp and cannabis growers, and home gardeners seeking safe, effective, and environmentally responsible solutions for fungal diseases and pests.
Pros:
- OMRI Listed® and EPA 25(b) exempt, safe for organic use
- Controls powdery mildew, rust, blight, and other diseases
- Botanical oils provide insect and mite control
- Safe for use up to harvest with no residual toxicity
- Suitable for diverse growing environments including hydroponics
- Environmentally responsible manufacturing and packaging
Cons:
- Requires mixing before use
- Needs thorough, regular application for best results
- Avoid application in extreme heat or direct sunlight
8. Dow AgroSciences 173917 Eagle 20EW Fungicide
Eagle 20EW Specialty Fungicide is a systemic fungicide that both prevents and cures over 15 turf diseases, as well as damaging nursery and ornamental diseases including black spot, powdery mildew, and scab.
Its active ingredient, Myclobutanil, inhibits the synthesis of ergosterol, hindering cell wall development in targeted pathogens.
It migrates upward through plant tissue, providing continuous protection as new foliage appears for up to 28 days.
Best for: Residential and commercial turf, landscape, greenhouse and nursery ornamentals, as well as home orchards and fruit trees.
Pros:
- Prevents and cures fungal diseases.
- Systemic protection that protects new growth.
- Well tolerated by popular turfgrass and ornamental species.
- Convenient, liquid formulatin.
- Controls dollar spot, brown patch, anthracnose, spring dead spot, necrotic ring spot, red thread, leaf spot, powdery mildew, and rusts.
Cons:
- Not for sale to AK NY (Restricted To Licensed Applicators Only).
- The best control for labeled diseases is achieved with application on a 7- to 14-day schedule.
- Requires treatments to be watered in, using 1/4 inch of water within six hours of application.
9. Fertilome (10765) F-Stop Lawn and Garden Fungicide
F-Stop Lawn & Garden Fungicide (16 oz) by VPG Fertilome is a concentrated liquid fungicide containing 1% Myclobutanil, designed to prevent and control a broad range of fungal diseases on roses, flowers, ornamental shrubs, berries, fruits, nuts, vegetables, and lawns.
It effectively manages diseases such as powdery mildew, black spot, rust, blights, brown patch, dollar spot, red thread, summer patch, leaf spot, and others.
The product is rainproof within 2 hours of application, providing lasting protection. One pint treats up to 750 sq. ft.
Best for: Homeowners and gardeners seeking a systemic fungicide to protect ornamental plants, fruits, vegetables, and turf from common fungal diseases.
Pros:
- Controls over 15 major fungal diseases
- Systemic action protects new growth
- Rainproof in 2 hours
- Suitable for a wide variety of plants and lawns
- Concentrated formula allows for dilution and precise application
Cons:
- Requires repeated applications every 2–4 weeks or at first disease signs
- Not available for sale in several states (e.g., CA, NY, MA) due to regulations
- Requires thorough coverage of plant surfaces, including undersides of leaves
10. Atticus Gravex 20 EW (16 oz) Fungicide
Check PriceGravex 20 EW Fungicide by Atticus LLC is a systemic fungicide containing 19.7% Myclobutanil, designed for both curative and preventative control of over 38 fungal diseases in turfgrass, ornamentals, and residential fruit trees.
It disrupts the development of fungal cell walls, providing protection for up to 28 days with a single application.
It is compatible with commonly used fungicides, insecticides, growth regulators, and spray adjuvants and is best used in a regular preventative spray program.
Best for: Use in turf, ornamentals, greenhouses, nurseries, and golf courses and for homeowners wanting to protect their lawns and landscapes from a broad spectrum of fungal diseases.
Pros:
- Provides systemic control of over 38 fungal diseases
- Has both curative and preventative properties
- Delivers protection for up to 28 days with a single application
- Approved for use on common turf species, over 100 ornamental plants, and residential fruit trees
- Can be used on ornamentals, turf grass, and residential fruit trees
Cons:
- Not for sale to AK, HI, and NY (Restricted To Licensed Applicators Only)
- Myclobutanil is known to leach through soil into groundwater under certain conditions
- Requires treatments to be watered in, using 1/4 inch of water within six hours of application.
11. Liquid Harvest Broad Spectrum Disease Control
Check PriceLiquid Harvest Pro Broad Spectrum Disease Control is a systemic fungicide containing 14.3% Propiconazole, designed for nursery, landscape, and turf applications in both commercial and residential settings.
It provides broad-spectrum control of many fungal diseases affecting turfgrass, herbaceous and woody ornamentals, and non-bearing fruits and nuts.
The fungicide offers good residual activity and protects new growth by moving systemically through plants.
Best for: Use in turfgrass, ornamental plants, and non-bearing fruit and nut trees to prevent and control a wide range of fungal diseases.
Pros:
- Broad-spectrum systemic control of many fungal diseases
- Provides residual protection
- Suitable for use on turf, herbaceous and woody ornamentals, and non-bearing fruits and nuts
- Can be used in commercial and residential settings
Cons:
- Not to be applied directly to water or areas with surface water
- Shipping restrictions apply; not available in AK, AZ, CA, HI, MN, NY, OR, WA
- Do not apply through irrigation systems
- Requires careful adherence to label instructions for safe use