MEASUREMENTS FOR PESTICIDE APPLICATION

The following is a compilation of equivalent, conversion and other data that will help in the mixing

and application of pesticides in small amounts. Always follow the label directions and precautions

of the material being used.

TABLE 1 – EQUIVALENTS

1 teaspoon ........................................................................................................1/3 tablespoon

3 teaspoons .........................................................................................................1 tablespoon

1 tablespoon .........................................................................................................3 teaspoons

2 tablespoons ......................................................................................................1 fluid ounce

4 tablespoons ...................................................................................1/4 cup or 2 fluid ounces

6 tablespoons ........................................................................................................1 dry ounce

8 tablespoons ...................................................................................1/2 cup or 4 fluid ounces

16 tablespoons ....................................................................................1 cup or 8 fluid ounces

96 tablespoons ..........................................................................1 dry pound or 16 dry ounces

¼ cup .................................................................................................................4 tablespoons

1 cup .................................................................................................1/2 pint or 8 fluid ounces

2 cups ................................................................................................1 pint or 16 fluid ounces

1 pint, liquid ......................................................................................................16 fluid ounces

1 quart, liquid .................................................................................................2 pints or 4 cups

1 gallon, liquid .............................................................................................................4 quarts

TABLE II – When recommendations are made on a per volume basis:

LIQUID PESTICIDES WETTABLE POWDERS

Rate Per 100

Gals. Water Per Gal.

Rate Per 100

Gals. Water Per Gal.

1 pint 1 teaspoon 1 pound 1 tablespoon

1 quart 2 teaspoons 2 pounds 2 tablespoons

1 gallon 1 ½ fluid ounces or

8 teaspoons 3 pounds 3 tablespoons

4 pounds 4 tablespoons

10 gallons 12 ½ fluid ounces or

4/5 pint

TABLE III – When recommendations are made on a per area basis:

LIQUID PESTICIDES WETTABLE POWDERS

Rate Per Acre Per 1000 sq.ft

Rate Per Acre Per 1000 sq. ft.

1 pint ¾ tablespoon 1 pound 5 teaspoons

1 quart 1 ½ tablespoons 2 pounds 3 tablespoons

2 quarts 3 tablespoons 3 pounds 5 tablespoons

1 gallon 6 tablespoons 10 pounds 1 cup

OTHER

Dry Measure: Wettable powders 1 ounce = 6 level tablespoons

Complete fertilizer, pelletized limestone 1 ounce = 2.25 tablespoons

Limestone 1 cup = approximately 1 lb.

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The following is a compilation of equivalent, conversion and other data that will help in the mixing

and application of pesticides in small amounts. Always follow the label directions and precautions

of the material being used.

TABLE 1 – EQUIVALENTS

1 teaspoon ........................................................................................................1/3 tablespoon 3 teaspoons .........................................................................................................1 tablespoon 1 tablespoon .........................................................................................................3 teaspoons 2 tablespoons ......................................................................................................1 fluid ounce 4 tablespoons ...................................................................................1/4 cup or 2 fluid ounces 6 tablespoons ........................................................................................................1 dry ounce 8 tablespoons ...................................................................................1/2 cup or 4 fluid ounces 16 tablespoons ....................................................................................1 cup or 8 fluid ounces 96 tablespoons ..........................................................................1 dry pound or 16 dry ounces ¼ cup .................................................................................................................4 tablespoons 1 cup .................................................................................................1/2 pint or 8 fluid ounces 2 cups ................................................................................................1 pint or 16 fluid ounces 1 pint, liquid ......................................................................................................16 fluid ounces 1 quart, liquid .................................................................................................2 pints or 4 cups 1 gallon, liquid .............................................................................................................4 quarts TABLE II – When recommendations are made on a per volume basis: LIQUID PESTICIDES WETTABLE POWDERS Rate Per 100 Gals. Water Per Gal. Rate Per 100 Gals. Water Per Gal. 1 pint 1 teaspoon 1 pound 1 tablespoon 1 quart 2 teaspoons 2 pounds 2 tablespoons 1 gallon 1 ½ fluid ounces or 8 teaspoons 3 pounds 3 tablespoons 4 pounds 4 tablespoons 10 gallons 12 ½ fluid ounces or 4/5 pint TABLE III – When recommendations are made on a per area basis: LIQUID PESTICIDES WETTABLE POWDERS Rate Per Acre Per 1000 sq.ft Rate Per Acre Per 1000 sq. ft. 1 pint ¾ tablespoon 1 pound 5 teaspoons 1 quart 1 ½ tablespoons 2 pounds 3 tablespoons 2 quarts 3 tablespoons 3 pounds 5 tablespoons 1 gallon 6 tablespoons 10 pounds 1 cup OTHER Dry Measure: Wettable powders 1 ounce = 6 level tablespoons Complete fertilizer, pelletized limestone 1 ounce = 2.25 tablespoons Limestone 1 cup = approximately 1 lb.

It’s important to calibrate your spray equipment and determine how many gallons per area you

apply. Example: If your rate of application is 1 gallon per 1000 sq. ft and the recommended rate of

pesticide per acre is 2 pounds, then the mixture rate per gallon is 3 tablespoons (see Table III).

Most herbicide recommendations are given on a per area (acre, per 1000 ft., etc.) basis and are

reasonably easy to calculate if you know your rate of application. When insecticide or fungicide

recommendations are given on a per acre basis you have to determine your (either hydraulic or

mist blower) spray application rate in order to apply the recommended amount of pesticide.

Calibration: Put one gallon of plain water in the sprayer and apply as recommended (to drip, mist,

etc.). Tally the number of trees treated by the gallon and then compute the gallons per acre

according to the trees/acres spacing of your plantation using the following:

Spacing Trees/acre

5 x 5 feet 1,742 trees

5 x 6 1,452 (other spacing data readily available)

6 x 6 1,

Example 1: How much pesticide is mixed per gallon if the recommended rate is one quart

per acre. In your calibration you found that one gallon of water was enough to treat 40 trees.

Since your trees are planted on a 6 x 6 spacing you would need 30 gallons of mixture to

treat one acre of trees.

gallons/acre = trees/acre spacing = 1210 = 30.25 gallons per acre application rate

trees treated/gallon 40

To figure amount of pesticide:

amount/gallon = recommended rate/acre

gallons/acre application rate

amount/gallon = 1 quart/acre = 32 ounces = 1.1 ounces/gallon

30 gallons/acre 30 gallons

Since 1 fluid ounce = 2 tablespoons (see table 1)

Then 1.1 ounces = 2.2 tablespoons

amount/gallon = 2.2 tablespoons/gallon

Answer: mix 2.2 tablespoons of pesticide per gallon of water (for 3 gallon sprayer mix 6.

tablespoons or approximately ¾ cup/3 gallon tank (see table 1).

Example 2: How much pesticide is mixed per gallon if the recommended rate is 1 quart per

acre and it takes 100 gallons to treat an acre?

1 quart/acre = 32 ounces = .32 ounces/gallon

100 gallon/acre 100 gallons

Compiled by M. Patmos 2006

MEASUREMENTS FOR PESTICIDE APPLICATION, Study notes of Nursing

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