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QUALI-PRO
Chlorothalonil DF Fungicide
Chlorothalonil DF Fungicide is a dry, flowable fungicide that prevents and controls various plant diseases on cool or warm-season grasses, ornamental plants, and trees. It can control dollar spots, brown patches, leaf spots, and more.
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Chlorothalonil DF Product Page
Min : 90.75 - Max : 90.75
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Price as of
09/22/25
09/22/25
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Chlorothalonil DF Fungicide, manufactured by Quali-Pro, is a professional-grade fungicide that prevents various plant diseases.
This water-dispersable granule can be applied to warm and cool season grasses and is safe to use on all ornamental plants listed on the label. Chlorothalonil DF is approved for use on tree farms, sod farms, golf courses, ornamental fields, nurseries, and greenhouses.
Chlorothalonil DF Fungicide controls dollar spots, brown patches, algae, leaf spots, and more. This fungicide can be used multiple times in the exact location without creating resistance.
Tools Needed
This product can be applied using a professional skid sprayer, sprinkler system, air-assisted spray equipment, chemigation equipment, and various types of irrigation equipment.
How to Use
- Step 1: Determine how much Chlorothalonil DF Fungicide to use by measuring the square footage of the treatment area. To do this, measure the length and width of the treatment area in feet, then multiply them together (length x width = square footage). Once you have the square footage, divide it by one acre to get acres (square footage / 43,560 sq. ft. = acreage). The general rate for using Chlorothalonil DF Fungicide is 1 to 2.5 lbs. in 100 gallons of water per acre. So, if you measured 3 acres to treat, you would need to mix 3 to 7.5 lbs. of product in 300 gallons of water. Application rates vary depending on the disease and where you are applying.
- Step 2: Fill your spray tank with half the amount of water needed and then add the appropriate amount of product based on your calculations. Add the remaining half of water and then agitate well to ensure the product is sufficiently mixed.
- Step 3: Keep the agitator process running while making applications. Be sure to make even and thorough applications. Re-treatment applications depend on the disease being controlled and the vegetation being treated.
Where to Use
Chlorothalonil DF Fungicide is ideal for use on tree crops, sod farms, golf course fairways, golf course tees, greens, and ornamental plants grown in fields, nurseries, or greenhouses.
Chlorothalonil DF Fungicide cannot be used on home lawns and turfs on properties of apartment buildings, school yards, sports fields, campgrounds, parks, or theme parks.
When to Use
Applications of Chlorothalonil DF Fungicide should be applied when weather conditions are supportive of disease development. Applications can be repeated under these conditions using the application rates listed on the label. When treated label listed tree crops, the time to apply Chlorothalonil varies depending on the type of disease being controlled. Applications made during times of bloom can injure flowers and fruits.
Safety Information
Chlorothalonil DF Fungicide is safe to use around children and pets when applied according to the product label instructions. Always wear the proper personal protective equipment (PPE) when mixing and applying this product.
Keep people and pets out of the treated area until the sprays have completely dried.
Special Considerations
Do not use on fine fescue turf due to the potential for phytotoxicity or turfgrass injury.
| Availability | Online |
| Restricted Use | No |
| Shipping Restrictions | 10 Pound: AK, CA, CT, HI, MI, NY, OR, RI, SC, VT |
| Brand | QUALI-PRO |
| Keith's Pro Tips | "When applying fungicides, the timing of applications is important. For the best results, apply Chlorothalonil DF Fungicide during weather conditions that promote diseases before diseases begin to form." |
| Product Drawbacks | Chlorothalonil DF Fungicide cannot be applied to home lawns. To treat home lawns for various lawn and plant diseases, we recommend Martin's Systemic Fungicide RTS. |
| Target Pests | Chlorothalonil DF Fungicide prevents the following plant diseases: Actinopelte Leaf Spot, Alternaria Leaf Spot/Leaf Blight, Anthracnose, Anthracnose Blight, Anthracnose Leaf Blotch, Ascochyta Blight, Autoecious, Bipolaris Leaf Spot, Black Spot on Roses, Blight, Botrytis, Botrytis Flower Spot, Botrytis Leaf Spot, Brown Blight, Brown Patch, Brown Rot, Canker, Cephalosporium Leaf Spot, Cercospora Leaf Spot, Cercosporidium Leaf Spot, Copper Spot, Corynespora Leaf Spot, Coryneum Blight, Curvularia Flower Spot, Curvularia Leaf Spot, Cyclaneusma, Cylindrosporium Leaf Spot, Dactylaria Leaf Spot, Dichondra, Didymellina Leaf Spot, Dollar Spot, Dreschlera Leaf Spot, Fabraea Leaf Spot, Fusarium Leaf Spot, Gloeosporium Black Leaf Spot, Grey Leaf Spot, Ink Spot, Leaf Spot, Lophodermium, Marssonia Leaf Spot, Melting Out, Monilinia Blossom Blight, Mycosphaerella Ray Blight, Myrcothecium Leaf Spot, Needle Rust, Nematostoma Leaf Blight, Ovulinia Flower Blight, Phoma Twig, Phylosticta Leaf Spot, Ramularia Leaf Spot, Red Thread, Rhabdocline, Rhizoctonia Aerial, Rhizopus Blossom Blight, Rhizosphaera, Scirrhia Brown Spot, Scleroderris, Sclerotinia Flower Blight, Septoria Leaf Spot, Sirococcus, Speedling Blight, Sphaeropsis Leaf Spot, Stagonospora Leaf Scorch, Swiss Needlecast, Tan Leaf Spot, Tip Blight, Volutella Leaf Blight, and Web Blight. |
| Application Equipment | Gloves, Spray Rig |
| Application Methods | Broadcast Spray, Spot Treatment |
| Active Ingredient | Chlorothalonil- 82.5% |
| Product Type | Fungicide |
| Formulation | Water Dispersible Granule (WDG) |
| Application Rate | The number of pounds of Chlorothalonil DF Fungicide required per mixture varies and depends on the application method, type of vegetation being treated and the type of disease being controlled. The mix rate for most applications should be enough to treat at least 1 acre, which is typically 30 to 40 gallons mixture. Refer to the label for specific mixing and application instructions. For more specific application rates please refer to the label. |
| Shelf Life | Chlorothalonil DF Fungicide will last for up to 1 to 2 years when stored according to the product label. Store Chlorothalonil DF Fungicide in a cool, dry storage area until ready for use. |
| Yield | A 30 to 40 gallon mixture of Chlorothalonil DF Fungicide will treat up to 1 acre, depending on the application method, type of vegetation being treated, and the disease being controlled. 2.5 to 8.8 pounds of Chlorothalonil DF Fungicide will treat up to 1 acre, depending on the plant disease being controlled. |
| Use Sites | Outdoors |
| Time to Kill | Chlorothalonil DF Fungicide is formulated as a preventative treatment. When used after plant diseases have developed, it may take 2 to 4 weeks to see results. When grasses area often mowed, low application rates may not be effective. |
| Comparable Products | Daconil Ultrex Fungicide |
| EPA Registration # | 53883-313 |
| Restricted Use | No |
|---|---|
| Shipping Restrictions | AK, CT, HI, MI, NY, OR, RI, SC |
| Availability | Online |
| Signal Word | WARNING |
| Keith's Pro Tip | "When applying fungicides, the timing of applications is important. For the best results, apply Chlorothalonil DF Fungicide during weather conditions that promote diseases before diseases begin to form." |
| Target Pests Multi | Algal Scum, Anthracnose, Apricot Scab, Autoecious Needle Rust , Black Knot, Botrytis Seedling Blight, Brown Blight, Brown Patch, Cherry Leaf Spot, Copper Spot, Coryneum Blight Shothole, Cyclaneusma Needlecast, Dichondra Leaf Spot, Dollar Spot, Fusarium Patch, Gray Leafspot, Gray Snowmold, Lacy Russet Scab, Leaf Curl, Leafspot, Lophodermium Needlecast, Melting Out, Phoma Twig Blight, Red Thread, Rhabdocline Needlecast, Rhizosphaera Needlecast, Scirrhia Brown Spot, Scleroderris Canker, Sirococcus Tip Blight, Stem Rust, Swiss Needle Cast |
| Time to Kill | Chlorothalonil DF Fungicide is formulated as a preventative treatment. When used after plant diseases have developed, it may take 2 to 4 weeks to see results. When grasses area often mowed, low application rates may not be effective. |
| Chemical Type | Fungicide |
| Formulation | Water Dispersible Granule (WDG) |
| Application Methods | Broadcast Spray, Spot Treatment |
| Product Drawbacks | Chlorothalonil DF Fungicide cannot be applied to home lawns. To treat home lawns for various lawn and plant diseases, we recommend Martin's Systemic Fungicide RTS. |
| Active Ingredient | Chlorothalonil- 82.5% |
| Application Equipment | Gloves, Spray Rig |
| Mix Rate | The number of pounds of Chlorothalonil DF Fungicide required per mixture varies and depends on the application method, type of vegetation being treated and the type of disease being controlled. The mix rate for most applications should be enough to treat at least 1 acre, which is typically 30 to 40 gallons mixture. Refer to the label for specific mixing and application instructions. For more specific application rates please refer to the label. |
| Use Sites | Outdoors |
| Yield | A 30 to 40 gallon mixture of Chlorothalonil DF Fungicide will treat up to 1 acre, depending on the application method, type of vegetation being treated, and the disease being controlled. 2.5 to 8.8 pounds of Chlorothalonil DF Fungicide will treat up to 1 acre, depending on the plant disease being controlled. |
| EPA Registration No. | 53883-313 |
| Shelf Life | Chlorothalonil DF Fungicide will last for up to 1 to 2 years when stored according to the product label. Store Chlorothalonil DF Fungicide in a cool, dry storage area until ready for use. |
| Comparable Products | Daconil Ultrex Fungicide |
| Children or pets? | No |
| Property Characteristics | None |
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