EFEITO DA APLICAÇÃO DE HERBICIDAS NO CULTIVO DE ARROZ VERMELHO (Oriza sativa L.)

Abstract

Red rice (Oryza sativa L.) is grown in the northeast of Brazil and has great socioeconomic importance. Objective of this study was to evaluate the effect of herbicides in the cultivation of red rice. The experiment was carried out in rainfed conditions, under field conditions, the Agricultural Science Center, The experimental design was a randomized block in a factorial 2x4 + 1, consisting of 9 treatments, which were applied two herbicides (Herbadox® 400 EC and DMA ® BR 806), all conducted with four replicates per treatment. Scott-Knott test was used at 5% probability to compare the means and quantitative data used polynomial regression and we used the statistical software program Sisvar. The treatments used were the mixture of two herbicides, development was satisfactory, while the treatments where the herbicides were used individually a smaller influence was observed on plant growth at the diameter and number of leaves generating a lower efficiency. The control weeds was more effective herbicides applied in mixture and the grain weight herbicidal application mixture is concluded that the variables plant height, stem diameter, leaf number showed the best values to the application of herbicides in admixture, for weed control was more efficient with the application of herbicides with and without mixing, then the best results in grain weight was with applications of herbicides in admixture.