Calibration is the process of measuring and adjusting the amount of pesticide your equipment will apply over a target area. It is a critical "first step" in making certain that your equipment is applying pesticide uniformly and at the correct rate. Calibrating your equipment will save you money, by not wasting pesticides from overapplication; and time, by preventing the need for re-application from underapplication. Overapplying pesticides also can result in excess residues on or in plants, soil, and surface or groundwater. Remember that exceeding the label rate of application is a violation of the law!
Whenever possible, calibration should be done using water or another non-toxic carrier. Wear the appropriate protective equipment whenever using a pesticide.
Remember to always read and follow all of the pesticide label information.
Sources and References:
1) A Training Manual for Commercial Pesticide Applicators (Category 3a). Turf Pest Management. 1998. K. Sichneder. Michigan State University Extensioin, Extension Bulletin E-2327.
2) Calibrating Turfgrass Chemical Application Equipment. 1991. H.E. Ozkan. Ohio Cooperative Extension Service. The Ohio State University, Extension Bulletin 817.
3) Illinois Pesticide Applicator Training Manual 39-7, Private Applicator. 1991. R.Wolf, R. Ferree, N. Pataky, C. Anderson, P. Nixon, L. Bode. University of Illinois, College of Agriculture Cooperative Extension Service.
4) Corn & Soybean Field Guide. 2005. Purdue Crop Diagnostic Training and Research Center and Purdue Pest Management Program. Purdue University Extension Service. ID-179.