UTILIZAÇÃO DE HERBICIDAS NO CONTROLE DE PLANTAS DANINHAS NA CULTURA DO MILHO HÍBRIDO RG-02A

Abstract

The corn (Zea mays L.) is a widely cultivated cereal in much of the world, being extensively used due to its nutritional qualities. The objective of this study was to evaluate different herbicide rates in weed control and growth traits in RG-02A hybrid corn. The experiment was conducted in randomized blocks, with six treatments and four replicates. An application was carried out at 30 days after planting, with combined dosages. In the control, no control practice was adopted to contain weeds. In treatment 2, mechanical weeding was performed to control invasive plants. The data were analyzed by the Scott-Knott test up to 5% probability to compare the means and for the quantitative data was used polynomial regression analysis, testing the linear and quadratic model, chosen to explain the results the model with the highest meaningfulness. The results showed no significant effect for the variables used, both at plant height and stem diameter. Treatment (T6) with 100% glyphosate (3 L / ha-1) + 100% imazapyr (1.5 L / ha-1) revealed higher plant height (2.26 m). In the weed treatment (T2) a larger diameter of the stem of the plant was verified.