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The challenge of managing herbicide-resistant weeds is an agricultural reality in Brazil that shall not be neglected. In this sense, Ministério da Agricultura, Pecuária e Abastecimento (MAPA) published Act No. 45 on July 14, 2017, provides the inclusion of a code system on labels and leaflets of insecticides, fungicides and herbicides, in order to demonstrate the mode of action of the active ingredient present in the product. In case of mix formulations, both molecules must be discriminated, adopting the same “Herbicide Resistance Action Committee - HRAC” international reference code. The Act No. 45 facilitates the process to choose and adopt products by all those involved in the chain production. It also collaborates with the possible to standardize the mixture of the products, since the need to mix products from different chemical groups to correct handling the resistance cases and avoiding potential new cases. In summary, the process of recognizing the mode of action and classification of herbicides was facilitated, as well as its practical adoption by technicians, growers and the chain production.

Modifications on Labels and Leaflets of Herbicides for Preventing and Managing Resistance