The use of plant protection products are the most effective method to protect crops from pests. The primary goal of procedure is to spray as effective as possible to control pests. The effectiveness of this, like the level of pesticide use and safety during procedure depends largely on the quality of the liquid spray atomization. One of the three determinants of the quality of the procedure spray is the degree of coverage of sprayed objects. However, both the coverage and the other two – applying the liquid spray and the uniformity distribution of liquid. None of these indicators do not take into account the characteristics of the plant spray. Therefore, the UP Institute of Agricultural Engineering in Wroclaw was conducted a two-phase study, whose aim was to show the degree of coverage of sprayed objects in the aspect of the characteristics of sprayed plants in the flat field crops.