PREDECESSOR is a herbicide consisting of three active ingredients (Imazetapyr, Flumioxazim and Diclosulam), giving effective control to the main weeds that affect crops. The imazetapyr grants a high residual power that, when absorbed by the foliar and root routes, allows the control of emerged weeds as well as those that germinate after their application. It works by interrupting protein synthesis at weed growth points. Once applied, it stops weed growth. Flumioxazim works by inhibiting the enzyme protoporphinogen oxidase (PPO) blocking the biosynthesis of chlorophyll, resulting, by the action of solar energy, in an accumulation of porphyrin photo toxins that cause cell death. It controls weeds emerged by contact action when it is absorbed by the foliar route and has pre-emergent action. The pre-emergent action is given because flumioxazin forms a film in the first centimeters of the soil that when the weeds begin to develop, they come into contact with the product and then with the sole action the product is activated and their death occurs. Diclosulam is an inhibitor of the enzyme acetolactate synthetase (ALS), belonging to the group triazolopyrimidine sulfonanilides. It belongs to Group B (HRAC) and Group 2 (WSSA) (ALS inhibitors).