Compass Fungicide

Compass 50 WG Fungicide is a broad-spectrum preventive and curative fungicide containing 50% trifloxystrobin for long-lasting control of listed foliar, stem, and root diseases in turfgrass and ornamentals. Its water-dispersible formula controls diseases such as brown patch, anthracnose, leaf spot, rust, powdery mildew, summer patch, and pink snow mold while using low application rates.

 

What diseases does Compass 50 WG Fungicide control?

Compass 50 WG Fungicide controls numerous fungal diseases affecting lawns, turfgrass, and ornamentals, including:

• Brown patch
• Anthracnose
• Leaf spot
• Gray leaf spot
• Summer patch
• Rapid blight
• Red thread
• Pink patch
• Rust
• Fusarium patch
• Pink snow mold
• Powdery mildew
• Downy mildew
• Botrytis
• Black spot
• Scab
• Rhizoctonia stem and root rot
• Damping off caused by Rhizoctonia
• Other diseases listed on the product label

Compass provides suppression rather than complete control of dollar spot. During periods of dollar spot pressure, tank-mix or rotate Compass with Bayleton 50 or another fungicide labeled for dollar spot control.

When conditions favor Pythium blight, Compass must be combined with a fungicide specifically labeled for Pythium control.

 

When is the best time to apply Compass 50 WG Fungicide?

Compass 50 WG Fungicide works best as part of a preventive disease-control program. Apply it before visible symptoms develop or when temperature, moisture, and other environmental conditions favor development of the target disease.

Curative applications may be used for certain labeled diseases after symptoms appear. During heavy disease pressure, use the higher labeled rate and shorter application interval. Properly identify the disease before treatment so the appropriate rate and application schedule can be selected.

Disease-specific timing may vary. For example, applications for pink snow mold should be made in late fall before snow cover or in early spring after the snow melts. Do not apply the product over snow.

 

Where can Compass 50 WG Fungicide be applied?

Compass 50 WG Fungicide can be applied to all major turfgrass species and labeled ornamental plants in locations such as:

• Residential, commercial, and institutional lawns
• Golf courses
• Sports fields
• Sod farms
• Parks and municipal grounds
• Cemeteries
• Residential and commercial landscapes
• Interiorscapes
• Field and forest nurseries
• Outdoor seedbeds and field plantings
• Greenhouses
• Lath and shadehouses
• Containers and other enclosed growing structures

The product may be applied only to plants, diseases, and sites listed on the label. Do not apply through an irrigation system or by aerial application.

 

What is the Compass 50 WG application rate for lawns and turfgrass?

Compass 50 WG Fungicide application rates generally range from 0.1 to 0.25 oz. per 1,000 square feet, depending on the target disease, disease pressure, and whether the application is preventive or curative.

Apply the measured product in 1 to 2 gallons of water per 1,000 square feet to provide thorough coverage. For soil-borne diseases, use enough water to carry the fungicide into the turf crown and upper root zone.

Common turfgrass rates include:

• Brown patch, preventive: Apply 0.1 to 0.2 oz. per 1,000 square feet every 14 days, or 0.15 to 0.25 oz. per 1,000 square feet every 21 days.
• Brown patch, curative: Apply 0.2 oz. per 1,000 square feet and repeat at 21-day intervals.
• Leaf spot, preventive: Apply 0.1 to 0.15 oz. per 1,000 square feet every 14 days.
• Leaf spot, curative: Apply 0.15 to 0.25 oz. per 1,000 square feet every 21 to 28 days.
• Anthracnose: Apply 0.15 to 0.2 oz. per 1,000 square feet every 14 days or 0.25 oz. per 1,000 square feet every 21 days.
• Summer patch: Apply 0.2 to 0.25 oz. per 1,000 square feet according to the label-directed preventive or rotation program.

Rates are determined by the target disease and disease-causing organism, not by the turfgrass species alone. Consult the product label for additional disease-specific rates and tank-mix directions.

 

How long does Compass 50 WG Fungicide last?

Compass 50 WG Fungicide can provide approximately 7 to 21 days of disease protection, depending on the target disease, application rate, site, environmental conditions, and level of disease pressure. Certain label-directed programs allow application intervals of up to 28 days.

Use shorter intervals when disease pressure is heavy or environmental conditions remain favorable for infection. Always follow the disease-specific interval listed on the label.

 

How do you mix Compass 50 WG water-dispersible granules?

Prepare only the amount of spray mixture needed for the immediate application. Clean the spray equipment before mixing and maintain agitation throughout the process.

To mix Compass 50 WG granules:

1. Fill the spray tank with approximately half of the required water.
2. Start the agitator.
3. Add the measured amount of Compass 50 WG Fungicide.
4. Continue agitation while adding the remaining water.
5. Wait until the granules have completely dispersed before spraying.
6. Maintain agitation until the entire mixture has been applied.

Do not allow the finished mixture to remain in the spray tank overnight. Flush the equipment thoroughly after use and apply the rinsate to a previously treated area according to label directions.
 

Can Compass 50 WG Fungicide be tank-mixed with other products?

Compass 50 WG Fungicide is compatible with many fungicides, insecticides, and foliar nutrient products. Tank mixing can provide broader-spectrum control, extend disease protection, and help manage fungicide resistance.

When preparing a tank mixture, add products in the following order:

1. Products in water-soluble packaging
2. Wettable powders and water-dispersible granules, including Compass
3. Liquid flowables and other liquid formulations
4. Emulsifiable concentrates

Allow each product to disperse completely before adding the next. Maintain agitation while adding the remaining water and throughout application.

Conduct a jar test for physical compatibility and test the mixture on a small number of plants for phytotoxicity before widespread use. Follow the most restrictive rate, precaution, and limitation on all labels included in the mixture.

Spray additives are not required. Do not use Compass with organosilicate-based additives, as plant injury may occur.

For heavy summer patch pressure, the label directs an initial Bayleton 50 treatment when soil temperatures reach 65°F, followed by a Compass or Compass plus Bayleton program. Follow both product labels and confirm that the combination is permitted at the treatment site.
 

How often can Compass 50 WG Fungicide be applied?

Application frequency depends on the target disease and treatment site. Turfgrass treatments are generally repeated every 14 to 28 days, while ornamental foliar treatments are commonly repeated every 7 to 14 days.

To reduce the risk of fungicide resistance:

• Do not make more than two sequential Compass applications for gray leaf spot.
• Do not make more than three sequential applications for other turfgrass diseases.
• Rotate with an effective fungicide having a different mode of action.
• Follow the ornamental resistance-management limits for the target pathogen.
• Do not exceed the annual or crop-cycle maximum use rates.

 

How do you apply Compass 50 WG Fungicide to turfgrass?

For effective turfgrass disease control:

1. Identify the disease before selecting the application rate.
2. Measure the appropriate amount of Compass for the target disease.
3. Apply in 1 to 2 gallons of water per 1,000 square feet for thorough coverage.
4. For soil-borne diseases, use sufficient water to reach the crown and upper root zone.
5. Apply after mowing whenever possible.
6. If applying before mowing, allow the treated turf to dry completely before mowing.
7. Allow the application to dry before irrigation.
8. Use the higher labeled rate and shorter interval during heavy disease pressure.

For the best results, combine fungicide applications with proper mowing, irrigation, fertilization, and other turf-management practices that promote healthy growth.

 

Should Compass 50 WG be applied before or after mowing?

Apply Compass 50 WG Fungicide after mowing whenever possible. If the lawn must be treated before mowing, allow the application to dry completely before cutting the grass.

Waiting until the treatment has dried helps prevent removal of fungicide from the treated grass blades and allows the product to bind to the plant surface.

 

How do you apply Compass 50 WG Fungicide to ornamental plants?

Compass 50 WG Fungicide may be applied to labeled ornamentals as either a foliar spray or growing-media drench, depending on the disease.

For most foliar diseases, apply 1 to 4 oz. per 100 gallons of water and spray the foliage thoroughly to the point of drip. Begin before disease is detected or when conditions favor disease development, then repeat every 7 to 14 days until the threat has passed.

Specific ornamental application directions include:

• Foliar applications: Apply 1 to 2 oz. per 100 gallons or 2 to 4 oz. per 100 gallons, depending on the pathogen, every 7 to 14 days.
• Rhizoctonia damping off: Apply 0.5 oz. per 100 gallons as a drench to seedlings and transplants. Repeat every 21 to 28 days.
• Selected root and stem diseases: Apply 1 to 2 oz. per 100 gallons as a drench to wet the upper half of the growing media. Repeat every 14 to 28 days, depending on disease pressure.
• Labeled nonbearing stone and pome fruit trees: Apply 2 to 3 oz. per 100 gallons beginning at bud break. Additional applications may be made at full bloom, petal fall, or every 14 to 21 days when conditions favor disease.

Use the highest labeled rate and shortest interval during heavy disease pressure. Under light pressure, the application interval may be extended as permitted by the label.

 

Is Compass 50 WG Fungicide rainfast?

Compass 50 WG Fungicide becomes rainfast within approximately two hours after application. For the best results, allow the treatment to dry completely before rainfall or irrigation, especially when treating foliar diseases favored by wet conditions.

For turfgrass, allow the treated area to dry completely before irrigating. When treating soil-borne diseases, use the label-directed spray volume during application to reach the turf crown and upper root zone.

 

Can Compass 50 WG Fungicide be used on vegetables or fruit trees?

Compass 50 WG Fungicide must not be used for disease control on greenhouse vegetables or vegetable transplants intended for outdoor crop production.

The product is labeled for certain nonbearing stone and pome fruit trees. However, do not apply it to fruit trees that will produce harvestable fruit within 12 months after the final application. Verify that the specific plant and use are listed before treating.