Society has become increasingly aware of the need to preserve the environment and health, demanding quality standards for food and agro-ecosystems. In this context, the rational use of phytosanitary products guarantees the sustainability of food production systems, mitigating, and even eliminating the effects caused by the indiscriminate use of chemical control. Other relevant aspects to be considered are the benefits arising from the crop-livestock integration that mitigate the negative effects caused by traditional agriculture, from the agronomic ones, through the recovery and maintenance of the soil productive characteristics; the economic ones, by diversifying the offer and obtaining higher yields; the ecological ones, by reducing the biota harmful to cultivated species and, consequently, reducing the amounts of chemical products applied. Within the scope of soil conservation practices, it has the advantage of considerably reducing erosion. In the social aspect, there is a more equitable distribution of income, generating a greater number of direct and indirect jobs, in addition to helping rural population remain in place. Thus, this project aimed to develop technologies for the management of tropical forage grasses, intercropped with annual crops, through the application of smaller amounts of herbicides, in order to guarantee the sustainability and competitiveness of crop-livestock integration systems. The project evaluated several systems for establishing maize, common bean and sunflower crops, intercropped with brachiaria grass species, through the application of lower doses of herbicides, in order to obtain better quality grains and pasture recovery afterward; it also evaluated the response of brachiaria grass species to glyphosate, in order to indicate species that are more sensitive to this herbicide and that allow the use of smaller amounts of the product for desiccation of straw, aiming at direct planting. Finally, the work evaluated the suppression of African stargrass with sub-doses of glyphosate in order to avoid competition between African stargrass and maize and allow the subsequent recovery of the forage sward. This project generated knowledge and information capable of improving the efficiency of integrated agriculture and livestock systems, with the possibility of higher yields for the farmer, since quality grains and pasture could be produced in the same area. Furthermore, there was a greater balance in the agroecosystem through the rational use of chemical control. The use of tropical forage grasses intercropped with grain production also favored the breaking of the cycle of pests and diseases. Taking into account the economic aspect, there was a reduction in the cost of production of annual crops and pastures and, consequently, a greater gain. From the social standpoint, the adoption of the developed technologies has enabled greater competitiveness and sustainability for both small and large rural properties. And, finally, the greatest progress made by the project was a positive impact to the environment, due to the considerable reduction in the amounts of herbicides applied, greatly minimizing the undesirable impact caused by the indiscriminate use of chemicals.