Choice of tracers for the evaluation of spray deposits

摘要: Tracer substances, used to evaluate spraying effectiveness, ordinarily modify the surface tension of aqueous solutions. This study aimed establish a method using tracers distribution and amount spray deposits, adjusted solution. The following products were tested: 0.15% Brilliant Blue, Saturn Yellow in 0.015% Vixilperse lignosulfonate, 0.005% sodium fluorescein, mixtures Blue plus fluorescein at same concentrations. Solutions deposited on citrus leaves stability was determined by measuring fluorescence optical density solutions without drying, dried dark exposed sunlight for 2, 4 8 h. These values compared those obtained directly water. static tracer solution weighing droplets formed during period 20 40 seconds. mixture stable under all conditions tested. It not absorbed maintained as that water, thus permitting concentration adjustment levels agrochemical products, allowing development qualitative based visual evaluation pigment ultraviolet light quantitative determination dye Spray deposition could be evaluated different tensions solution, simulating effect formulations.