CONTROLE QUÍMICO DE PLANTAS DANINHAS NA CULTURA DO MILHO HÍBRIDO AG 1051

Abstract

The maize (Zea mays L.) is a species that has several ways to use and is one of the most cultivated crops in the world, but one of the most common problems affecting this crop are the weeds that cause huge losses in its production. In this context, the aim of this study was to evaluate the application of herbicides in weed control and its influence on the characteristics of production of corn. The experiment in rainfed conditions was carried out in field conditions, the Crop Science Department of Agricultural Sciences Center (CCA), Campus II of the Federal University of Paraíba (UFPB), located in the municipality of Areia-PB. The experiment was arranged in completely randomized design, where treatments were postemergence herbicide dosages, Glyphosate 480 Agripec and DMA 806 BR, alone and in combination (T1: No weeding, T2: Weeding, T3: Glyphosate (100 %) T4: DMA (100%) T5: Glyphosate (50%) + DMA (50%) T6: Glyphosate (100%) + DMA (100%), T7: Glyphosate (50%) + DMA (100 %), T8:. Glyphosate (100%) + DMA (50%), which were applied after tasseling the variables analyzed were:. yields of corn grain, herbicide control efficiency and phytotoxicity was concluded that the treatment used the glyphosate at maximum dosage showed the best results in relation to grain production, application of DMA (100%) + Glyphosate (100%) was the treatment that most influenced negatively on grain production, the better results in the control of weeds were in treatments that used the herbicides Glyphosate (100%) + DMA (100%) and Glyphosate (50%) + DMA (50%); The isolated application of Glyphosate (100%) was higher than isolated application of DMA (100%) in the control of weeds; The most severe phytotoxicity indices were found in the treatments of the Glyphosate (100%) and Glyphosate (100%) + DMA (50%).