Best Fungicide For St Augustine: 10 Lawn Options Compared

#1 · Best Overall

1. Scotts DiseaseEx Lawn Fungicide

• Weight: 10 lb
• Form: Patch

Best for: Broad lawn disease coverage.

Why it ranks #1: This lawn fungicide lists control of 26 diseases, including brown patch, red thread, and powdery mildew, giving it the broadest stated lawn coverage.

Control and prevention for 26 listed lawn diseases give Scotts DiseaseEx a wide-ranging role in a lawn-care plan. It can be used before disease appears or at the first sign of symptoms, making it relevant to both preventive treatment and early response on lawns where several fungal problems are concerns.

The 26-disease list includes brown patch, pythium blight, red thread, powdery mildew, and anthracnose, so the product covers multiple named lawn problems rather than a single disease. Its stated use for prevention before symptoms and control at their first sign supports two different treatment timings. The 10-pound product is a solid-form lawn fungicide; follow its label limits, including the annual maximum of 37 pounds per 1,000 square feet and the treated-area re-entry restriction.

Skip it if you need a hose-end spray application; Spectracide Immunox comes with a QuickFlip hose-end sprayer.

Choose Scotts if you want one lawn product with a long named disease list and both preventive and early-symptom use. It suits disease-conscious lawn care, provided you can observe its application limits and treated-area re-entry restriction.

Listed on Amazon as: Scotts DiseaseEx Lawn Fungicide, 10 lbs.

#2 · Brown Patch Pick

2. Atticus Gunner 14.3 MEC

• Weight: 4 oz
• Form: Liquid

Best for: Easy-mixing propiconazole concentrate.

Why it ranks #2: Its 14.3% propiconazole formula lists protection against more than 20 plant fungi, including brown patch, a named lawn disease.

A microemulsion concentrate is the defining feature of Atticus Gunner 14.3 MEC, with the supplied description linking its extremely small particles to easier mixing and greater product stability. Its 14.3% propiconazole formula is presented for broad-spectrum prevention against more than 20 plant fungi, including brown patch and leaf spot.

The MEC formulation is described as easy-mixing and more stable, which can simplify preparing a concentrate for application while supporting product handling. Gunner's stated protection covers more than 20 plant fungi; the specific examples of brown patch and leaf spot make its lawn relevance clear. It is a liquid concentrate supplied in a pint, and its low-odor formulation may matter during handling. Use the product label for application rates and directions not provided here.

Skip it if you prefer a granular application rather than liquid concentrate; Bonide Infuse is supplied as granules.

Gunner fits buyers who want a liquid propiconazole concentrate and value the stated easy-mixing MEC formulation. Its named brown patch coverage is relevant to lawn care, while concentrate users should rely on the label for mixing and application details.

Listed on Amazon as: Atticus Gunner 14.3 MEC Propiconazole Fungicide (16oz) – Protect Your Lawn

#3 · Azoxystrobin Concentrate

3. Atticus Artavia 2 SC

• Weight: 1.3 lb
• Form: Liquid

Best for: Liquid broad-spectrum concentrate.

Why it ranks #3: This liquid concentrate contains 22.9% azoxystrobin and lists control of more than 20 turf fungi, including anthracnose and leaf spot.

Azoxystrobin at 22.9% gives Atticus Artavia 2 SC its central distinction: the active ingredient moves within the plant for stated root-to-leaf protection. The liquid concentrate is aimed at buyers managing disease across turf and ornamental plants, with more than 20 turf and 30 ornamental fungi listed as its coverage scope.

Artavia's stated movement within the plant connects leaf-to-root protection with a broad disease-control role, including foliar and soil-borne fungi. Its coverage claims span more than 20 turf and 30 ornamental plant fungi, with anthracnose and leaf spot named among the targets. The 16-ounce bottle is a liquid concentrate, so it is a fit for buyers who want one product category spanning lawn and landscape needs; the supplied information does not specify application equipment or mixing rates.

Skip it if you want a ready-to-use hose-end lawn spray; Spectracide Immunox specifies its QuickFlip hose-end sprayer.

Artavia suits lawn and landscape owners seeking liquid azoxystrobin coverage across turf and ornamentals. Its breadth is useful when both plant groups matter, but buyers who need explicit mixing rates or application directions should consult the product label before choosing.

Listed on Amazon as: Atticus Artavia 2 SC Azoxystrobin Fungicide (16oz) – Broad Spectrum Control

#4 · Fungus and Insect

4. Spectracide Immunox Fungus Plus Insect Control

• Weight: 2.4 lb
• Form: Spray

Best for: Hose-end fungus and insect control.

Why it ranks #4: The ready-to-spray lawn formula controls listed diseases and kills listed lawn-damaging insects on contact, combining two stated functions.

A QuickFlip hose-end sprayer pairs with a dual-action formula in Spectracide Immunox, letting buyers apply a product that controls listed lawn diseases and kills listed lawn-damaging insects on contact. Rainproof performance in hours adds another practical feature for lawns exposed to weather after treatment.

The sprayer attaches to a garden hose and activates with a switch flip, avoiding a separate application-equipment step specified in the product description. Its dual-action formula addresses both listed lawn diseases and lawn-damaging insects on contact, while the product is stated to become rainproof in hours. The directions also recommend starting when grass begins to green in spring and treating every two weeks for best results, a recurring schedule buyers should account for.

Skip it if you want a disease-only product with no insect-control feature; Atticus Gunner 14.3 MEC is presented as a fungicide.

Choose Spectracide if hose-end application and combined fungus and insect control suit your lawn-care workflow. Its stated spring start and two-week treatment interval are important boundaries for buyers who prefer less frequent scheduled applications.

Listed on Amazon as: Spectracide Immunox Fungus Plus Insect Control for Lawns, 32 oz

#5

5. BioAdvanced Fungus Control

• Weight: 2.4 lb
• Form: Liquid

Best for: Rain-resistant liquid lawn control.

Why it ranks #5: This 32-fluid-ounce liquid is specifically described as lawn fungus control, and its product information says it resists washing away from rain or watering.

Rain and watering resistance is the clearest practical distinction of BioAdvanced Fungus Control for Lawns: its supplied facts say control will not wash away due to either. That feature can matter where treated lawns encounter rainfall or irrigation, while the 32-fluid-ounce liquid bottle gives buyers a defined product format.

The stated resistance to washing away from rain or watering addresses a practical concern after lawn treatment: exposure to water is not described as removing its control. Its liquid form and 32-fluid-ounce bottle distinguish it from granular options, though the supplied information does not specify disease targets, application rates, or a sprayer. Buyers should therefore use the product label to establish whether its coverage matches the lawn problem and how to apply it.

Skip it if you need a fungicide with named lawn disease coverage; Scotts DiseaseEx lists 26 lawn diseases.

BioAdvanced is a fit for buyers who prioritize stated resistance to rain or watering after treatment and want a liquid lawn product. Its limitation is sparse disease information, so check the label for target diseases and application directions.

Listed on Amazon as: BioAdvanced Fungus Control for Lawns – 32 fl oz Bottle

#6 · Broad Disease List

6. Bonide Infuse Lawn Granules

• Weight: 7.5 lb
• Form: Granules

Best for: Systemic granules for varied plants.

Why it ranks #6: Its granular systemic formula controls over 30 plant diseases and is described for lawns, though the supplied details do not name St Augustine.

Systemic control across more than 30 plant diseases gives Bonide Infuse a broad role for buyers treating lawns alongside flowers and foliage plants. Its granular form is also described as providing broad-spectrum systemic control of soil-borne disease, extending the stated scope beyond lawn-only use.

The disease count and systemic description connect broad coverage with treatment across several plant settings: lawns, annual and perennial flowers, and foliage plants are all named uses. Its specific mention of soil-borne disease may matter to buyers seeking more than a foliar-focused product. Supplied as 7.5 pounds of granules, it offers a different handling format from liquid concentrates; the supplied details do not identify individual disease names or application rates, so consult the label for those specifics.

Skip it if you need named lawn diseases to guide selection; Scotts DiseaseEx identifies 26 specific lawn diseases.

Bonide Infuse fits buyers seeking granular systemic coverage for lawns and several ornamental plant types, including a stated soil-borne disease role. Its broad count is useful, but disease-specific needs require checking the product label.

Listed on Amazon as: Bonide Infuse Lawn & Landscape Systemic Disease Control, 7.5 lb.

#7

7. Syngenta Heritage G Fungicide

• Form: Liquid,Granular,Granule

Best for: Granular lawn and landscape use.

Why it ranks #7: This granular product contains 0.31% azoxystrobin and is listed for lawns and landscape areas, but the supplied data gives no disease list.

A 30-pound bag and a stated 0.31% azoxystrobin concentration define Syngenta Heritage G for buyers considering a granular fungicide across lawns and other managed landscapes. Its listed use settings extend from residential areas and parks to athletic fields, giving it a broad site-use scope rather than a lawn-only description.

Heritage G is identified as a fungicide containing 0.31% azoxystrobin, with the title and bag format identifying it as a granular product. The listed settings include lawns, golf courses, parks, recreational areas, and athletic fields, as well as residential, institutional, and commercial landscapes. That range can suit a buyer caring for varied turf areas, though the supplied information does not name specific controlled diseases, application rates, or spreader directions; those details must come from its label.

Skip it if you need named disease targets before selecting a fungicide; Scotts DiseaseEx lists 26 lawn diseases.

Heritage G suits buyers evaluating a granular azoxystrobin product for lawns or broader managed turf sites. Its listed settings are extensive, but the available details omit disease targets and application instructions, so confirm those needs against the label.

Listed on Amazon as: Heritage G Fungicide 30 lb Bag (1 Bag) 6666273

#8

8. AgChimp Strobe+ G Fungicide

• Weight: 15 lb
• Form: Granules

Best for: Broadcast-spreader granular treatment.

Why it ranks #8: The 15-pound granular product is described as dual-action and broad-spectrum for turfgrass, but its supplied details do not specify diseases or active ingredients.

Broadcast-spreader application is the defining workflow for AgChimp Strobe+ G: apply the granules evenly, then water them in to activate systemic movement. Its description identifies two broad-spectrum fungicides with preventative and curative action, offering a granular option for turf disease management.

The broadcast-spreader direction supports even distribution across turf, while watering after application is specified to activate systemic movement. The dual-action description says the formulation combines two broad-spectrum fungicides and works both preventatively and curatively, joining advance protection with response to disease. Supplied as 15 pounds of granules, it fits buyers prepared to spread and water in a product rather than use a hose-end spray; the provided facts do not name particular diseases or rates.

Skip it if you want a hose-end application without spreading granules; Spectracide Immunox includes a QuickFlip hose-end sprayer.

Strobe+ G suits turf owners who have a broadcast spreader and can water granules in after application. Its preventative and curative positioning is broad, but buyers needing named disease targets or rates should consult the label.

Listed on Amazon as: Strobe+ G Broad-Spectrum Dual-Action Granular Lawn Fungicide, 15lb

#9

9. ferti-lome Liquid Systemic Fungicide II

• Weight: 2 lb
• Form: Liquid

Best for: Liquid concentrate for lawn and ornamentals.

Why it ranks #9: This 32-ounce concentrate lists lawn use and diseases including anthracnose and powdery mildew, but its information also emphasizes roses, flowers, trees, and shrubs.

Ferti-lome Liquid Systemic Fungicide II is listed to prevent and control major diseases on lawns, roses, flowers, trees, and shrubs, giving it a broad home landscape role. Its 32-ounce liquid concentrate is especially relevant to buyers treating multiple plant groups rather than lawn alone.

The listed plant range connects one concentrate to lawn, rose, flower, tree, and shrub disease care, while the verified disease examples include black spot, leaf spot, anthracnose, powdery mildew, needle rust, and tip blight for trees, shrubs, and ornamentals. The label information also gives a roses-and-flowers mixing range of one to two tablespoons per gallon of water and says to let spray dry fully before watering. The supplied facts do not specify a lawn mixing rate.

Skip it if you need a supplied lawn mixing rate before choosing; Spectracide Immunox lists a recurring lawn treatment schedule.

Ferti-lome suits buyers managing disease across lawns and ornamentals who value a single liquid concentrate for several plant groups. Its supplied mixing guidance is specific to roses and flowers, so verify lawn directions on the label.

Listed on Amazon as: Fertilome (11378) Liquid Systemic Fungicide II Concentrate, 32 oz

#10

10. Southern Ag Liquid Copper Fungicide

• Weight: 1.3 lb
• Form: Liquid

Best for: Copper treatment for mixed plants.

Why it ranks #10: Its listed uses focus on vegetables, ornamentals, and fruit and nut crops; turfgrass is mentioned for algae control rather than lawn disease control.

Southern Ag Liquid Copper Fungicide covers disease on vegetables, ornamentals, fruit and nut crops, plus algae in turfgrass, making its listed use broader than lawn disease alone. The product is a 16-ounce liquid, and its verified formulation is stated to work well with hose-end sprayers.

The named crop range lets one product address disease concerns across garden plants and fruit or nut crops, while its additional algae-in-turfgrass use gives it a specific turf-related application. The hose-end sprayer compatibility can simplify applying the liquid over suitable areas without relying on a granular spreader. Its description also says it controls diseases caused by bacteria and fungi. The supplied details do not list specific turf fungal diseases or application rates, so check the label for those particulars.

Skip it if you need a fungicide with named lawn fungal targets; Scotts DiseaseEx lists 26 lawn diseases.

Southern Ag suits buyers treating a mix of garden crops and ornamentals who also need the stated algae-in-turfgrass use. It is not presented with named lawn fungal targets, so match its label to the specific turf problem.

Listed on Amazon as: Southern Ag – Liquid Copper Fungicide – Fungicide, 16oz