Abstract: Background: Factors such as herbicide formulation, dose, application technology, soil characteristics, species and temperature, influence the selectivity of herbicides. Crops such as eucalyptus and pinus lack registered products in Brazil. Objective: This study aimed to evaluate the selectivity of pre-emergent herbicides applied before or after planting eucalyptus and pinus. Methods: Two experiments were conducted in pots, in a randomized block design with five replications. The application modalities ‘spray and plant’ (SP) and ‘plant and spray’ (PS) were tested for […]