Publication #ENH90

Topics: Environmental Horticulture | Nursery Pest Management | Miscellaneous Weed Management Topics | Pesticide Equipment Calibration | Unruh, Joseph Bryan | Pesticides for Home, Lawn, Landscape and Garden

Pesticide Calibration Formulas and Information¹

J. Bryan Unruh²

CALIBRATION FORMULAS

Gallons Per Acre (GPA)
Gallons Per 1000 Square Feet
Ounces Per 1000 Square Feet
Gallons Per Minute (GPM)
Gallons Per Minute (GPM) Per Nozzle
Minute Per Acre
Minutes Per Load
Travel Speed (Miles Per Hour, MPH) (See Table 1 )
Table 1. Time (seconds) required to cover a specific distance to obtain a desired speed (mph).
Acres Covered Per Tank
Material Needed Per Tank
Flow Rate (As Influenced by Pressure)
For any change in travel speed (MPH), calculate the resulting GPA ₂ by using:

Figure 1.

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HELPFUL CALCULATIONS AND FORMULAS

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Figure 18.

Figure 19.

FINDING TANK CAPACITY (GALLONS)

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FLUID APPLICATION

Pounds Per Acre Nutrient Applied
PPM (Parts Per Million)
Pounds Active Ingredient (lb ai) to Use Per Tank
Pounds (lb) Commercial Material to Use Per Tank
Fluid Ounces (fl oz) to Use Per Tank
Gallons (gal) Commercial Material for Total Treated Acres
Table 2. Approximate Rates of Application Equivalents.

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PESTICIDE APPLICATION RECORD

Tables

Table 1.

Time (seconds) required to cover a specific distance to obtain a desired speed (mph).

		Time required (seconds) to travel a distance of
Desired MPH	Feet per minute	100 ft	200 ft	300 ft
2.0	176	34	68	102
2.5	220	27	54	81
3.0	264	23	45	68
3.5	308	20	39	58
4.0	352	17	43	51
4.5	395	15	30	45
5.0	440	14	27	41
6.0	528	--	23	34
7.0	616	--	19	29
8.0	704	--	17	26
9.0	792	--	15	23

Table 2.

Approximate Rates of Application Equivalents.

Weights	Liquid
1 oz/ft² = 2722.5 lbs/A	1 oz/1000 ft² = 43.56 oz/A = 1.4 qt/A
1 oz/yd² = 302.5 lbs/A	1 pt/1000 ft² = 5.4 gal/A
1 oz/100 ft² = 27.2 lbs/A	100 gal/A = 2.3 gal/1000 ft² = 1 qt/100ft²
1 oz/1000 ft² = 43.46 oz/A = 2.72 lbs/A
1 lb/A = 1 oz/2733 ft² = 8.5 g/1000 ft²
100 lb/A = 2.5 lb/1000 ft²

Footnotes

This document is ENH90, one of a series of the Environmental Horticulture Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Original publication date November 1993. Reviewed September 2006 and March 2011. Visit the EDIS website at http://edis.ifas.ufl.edu.

J. Bryan Unruh, Assistant Professor, Extension turf specialist, Environmental Horticulture Department, Cooperative Extension Service, West Florida Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Jay FL 32565.

No liability is assumed by the author or the University of Florida for the use of formulas in this publication.

The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other extension publications, contact your county Cooperative Extension service.

U.S. Department of Agriculture, Cooperative Extension Service, University of Florida, IFAS, Florida A. & M. University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, Dean.

Pesticide Calibration Formulas and Information1