Presents the requirements plant protection product labels, necessitate for sprayers and nozzles. Signalized needs for determination of the spray quality and selection of spraying parameters according to plant protection product labels requirements. Illustrated and explained the method of determining the spray classes of working liquid. Explains the determination methods and the importance of the various volume drop-size fractions, and the possibilities of their selection, according to the requirements of the plant protection product label, targets, and the environmental conditions. Emphasized the need to include these issues in training and educational material for users of plant protection product. Signaled the need for mandatory verification of the nozzles for use in crop protection and the need to establish procedures for their evaluation.