Ohio State University Extension Bulletin

Orchard Spray Rates
How to Determine the Amount of
Pesticide and Water to Use in Your Orchard

Bulletin 892-01


Calculations for Concentrate Applications,
How much pesticide is needed for a concentrate application?

The amount of pesticide to use per acre for concentrate applications can be determined for all orchards in general, as shown in Methods 1, 2, and 3 which are explained later in the text. The amount of pesticide to use per acre for concentrate applications can be customized to a specific orchard, as explained in Methods 4 and 5.

Before describing these methods, an important general point is that in concentrate spraying in a specific orchard block, the amount of pesticide per acre stays constant even if the amount of water changes. The rate of pesticide per acre is completely independent of the concentration used. For example, if you have an old sprayer that applies 75 gallons per acre and a new sprayer that applies 50 gallons per acre, you will use the same amount of pesticide per acre in either sprayer, although the mix in the old sprayer with 75 gallons will be a weaker concentration than the mix in the new sprayer with 50 gallons.

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All educational programs conducted by Ohio State University Extension are available to clientele on a nondiscriminatory basis without regard to race, color, creed, religion, sexual orientation, national origin, gender, age, disability or Vietnam-era veteran status.

Keith L. Smith, Associate Vice President for Ag. Adm. and Director, OSU Extension.

TDD No. 800-589-8292 (Ohio only) or 614-292-1868



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