During the application of pesticides in tree crops with airblast sprayers, part of the volume does not reach the vegetation and is lost through drift, evaporation, runoff, etc. These losses may pose risks to the environment and human health. To improve the application efficiency and reduce losses it is important to know the behaviour of spray droplets. This work proposes to analyze the behaviour of the droplets sprayed for pesticide applications on citrus by means of Computational Fluid Dynamics (CFD). A CFD simulation based on a 2D Eulerian-Lagrangian model was proposed to simulate both the airflow of an airblast sprayer and the wind, besides the individual behaviour of the droplets. At the end of the simulation, model results predict that 44% of the total amount of sprayed volume ended in the target tree of the treatment, 28% in adjacent trees, 20% was deposited on the ground and 8% was lost as atmospheric drift.