Simple Steps to Accurate Sprayer Calibration
Weekly Turf Tip 02/04/13
Accurate herbicide applications are essential for turf safety and good weed control efficacy. Calibrating sprayer solution volume involves selecting the proper nozzles, spraying pressure, and speed of travel. There are several different ways to accurately calibrate a sprayer, but the simplest is the 1/128th acre (340 sq. ft.) method. Regardless of the number of nozzles on the boom the spray collected from a single nozzle measured in ounces directly converts to gallons per acre. The ounces collected from 1/128th of an acre will equal gallons of solution per acre due to the fact there are128 ounces in a gallon.
Follow the 10 easy steps below to avoid needless chemical waste, improper application, and potential turf injury.
For a back-pack or other single nozzle sprayers this same method will still work. Simply determine the width of the spray pattern to get the distance (Ex: 20”/12 =1.66 then 340/1.66 = 204 ft.). Or, fill the sprayer completely with water then spray an area equal to 340 sq. ft. (20’ x 17’). The ounces of water required to refill the sprayer completely will equal gallons per acre.
Published February 4, 2013
Dr. Wayne Wells is an Extension Professor and Turfgrass Specialist. His mailing address is Department of Plant and Soil Sciences, Mail Stop 9555, Mississippi State, MS 39762. firstname.lastname@example.org