General Information


Equus DF, a dry flowable product containing chlorothalonil, is used as a spray for the control of many important plant diseases.


To avoid the development of tolerant or resistant strains of fungi, always tank mix Equus DF with a fungicide of different chemistry, and/or alternate a fungicide of different chemistry with Equus DF at each application. If after using Equus DF as directed and the treatment is not effective, a tolerant or resistant strain of fungi may be present. Discontinue the use of Equus DF for at least one season. Equus DF is effective for use in programs that attempt to minimize disease resistance to fungicides. Equus DF has a multi-site mode of action and can be used to delay or prevent the development of resistance to single-site fungicides. Consult with your Federal or State Cooperative Extension Service representatives for guidance on the proper use of Equus DF in programs that seek to minimize the occurrence of disease resistance to other fungicides.


Equus DF can be used effectively in dilute or concentrate sprays. Thorough, uniform coverage is essential for disease control. Do not combine Equus DF in a spray tank with pesticides, surfactants, or fertilizers, unless prior use has shown the combination to be physically compatible, effective, and non-injurious under conditions of use. Do not combine Equus DF with DiPel 4L, Foil, Triton AG-98, Triton B-1956 and Latron B-1956 as phytotoxicity can result from the combination when applied to crops listed on the label. Add the required amount of Equus DF slowly into the spray tank during filling. With concentrate sprays, premix the required amount of Equus DF in a clean container and add to the spray tank as it is being filled. Keep agitator running when filling spray tank and during spray operations.

Dosage rates on the label indicate lbs of Equus DF per acre, unless specified otherwise. Under conditions favoring disease development, use the highest rate specified and shortest application interval.


The product must not be applied within 150 feet for aerial and airblast applications, or 25 feet for ground applications of marine/estuarine water bodies unless there is an untreated buffer area of that width between the area to be treated and the water body.


AS A SPRAY (Ground or Aerial Equipment) - Apply Equus DF at the rate shown; use sufficient water to provide thorough coverage. Gallonage will vary with crop and amount of plant growth. Spray volume usually will range between 20 to 150 gallons per acre (200 to 1,400 liters per hectare) for dilute sprays and 5 to 10 gallons per acre (50 to 100 liters per hectare) for concentrate ground sprays and aircraft applications. Both ground and aircraft methods of application are suggested unless specific directions are given for a crop. Do not apply through sprinkler irrigation systems unless specific directions are given for a crop. See the following instructions for application and calibration.

Limitations, Restrictions, and Exceptions


- Use in sufficient water to obtain adequate coverage. Repeat applications at 7-day intervals. Equus DF can be applied the day of harvest. Equus DF may be applied through sprinkler irrigation equipment (solid set, portable wheel move, motorized lateral move, or center pivot systems only). See calibration directions preceding this section.

Note: Spraying mature watermelons may result in sunburn of the upper surface of the fruit. Do not apply Equus DF to watermelons when any of the following conditions are present:

– Intense heat and sunlight,

– Drought conditions,

– Poor vine canopy,

– Other crop and environmental conditions which may be conducive to increased natural sunburn.

Do not combine Equus DF with anything except water for application to watermelons unless your prior use has shown the combination to be non-injurious to watermelons under your conditions of use.

Restricted Entry Interval

12 hours