General Information


Mainsail 6.0 F is an excellent disease control agent when used according to label directions for control of a broad spectrum of plant diseases. Mainsail 6.0 F is recommended for use in programs that are compatible with the principles of Integrated Pest Management (IPM), which include the use of disease resistant crop varieties, cultural practices, pest scouting and disease forecasting systems that reduce unnecessary applications of pesticides.

Mainsail 6.0 F is effective for strategic use in programs that attempt to minimize disease resistance to fungicides. Some other fungicides that are at risk from disease resistance exhibit a single-site mode of fungicidal action. Mainsail 6.0 F, with a multi-site mode of action, may 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 Mainsail 6.0 F in programs that seek to minimize the occurrence of disease resistance to other fungicides.


Use of this product on home lawns is prohibited.

Agricultural Use Sites Only (sod farms, farms, forests, nurseries and greenhouses): This product must not be applied within 150 feet (for aerial 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.

Do not combine Mainsail 6.0 F in the spray tank with pesticides, surfactants or fertilizers, unless prior use has shown the combination physically compatible, effective, and noninjurious under your conditions of use. Do not combine Mainsail 6.0 F with Dipel or Latron B-1956 as phytotoxicity may result from the combination when applied to some species on the label. The required amount of Mainsail 6.0 F should be added slowly into the spray tank during filling. With concentrate sprays, premix the required amount of Mainsail 6.0 F 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.

Limitations, Restrictions, and Exceptions


Apply Mainsail 6.0 F in sufficient water and with proper calibration to obtain uniform coverage of tree canopy. Application with ground equipment is preferable to aerial application because ground applications generally give better coverage of the tree canopy. If application with ground equipment is not feasible, Mainsail 6.0 F may be applied with aircraft using at least 20 gallons of spray per acre. When concentrate sprays are used or when treating non-bearing or immature trees, the lower rate of Mainsail 6.0 F may be used.

Do not allow livestock to graze in treated areas.


Make the first application in spring when new shoot growth is 1/2 to 2 inches in length. Make additional applications at 3 to 4 week intervals until conditions no longer favor disease development. For use in nursery beds, apply the highest rate specified on a 3-week schedule.

The minimum re-treatment interval for established trees is 21 days. The minimum retreatment interval in nursery beds is 7 days.

Note: Volumetric rates to be used only with full dilute spray volume specified on the label for tree and orchard crops.

Spray Volume:


Forest Stand

Dilute: Note Used

Concentrate: 10-20 gallons / acre (aircraft)

Christmas Trees

Dilute: 100 gallons / acre

Concentrate: 10-50 gallons / acre (aircraft or ground equipment)

Nursery beds

Dilute: 100 gallons / acre

Concentrate: 5-10 gallons / acre (ground equipment only)

Restricted Entry Interval

12 hours