Fecha de publicación: -- Fuente: WIPO "tomato" The present invention pertains to the agricultural field, and particularly to the use of tall oil fatty acids as a phytosanitary adjuvant, particularly for preventing spray drift. The present inventors have indeed shown that the introduction of tall oil fatty acids into phytosanitary compositions allows increasing droplet size distribution upon spraying and therefore reducing off-target spraying. The present invention therefore provides methods for generating droplets, treating plants and for preventing spray drift. The invention also relates to phytosanitary compositions comprising tall oil fatty acids.