DANIELA BARBOSA MARQUES
Abstract:
Studies related to herbicide application technology can generate information that may contribute saving the financial resources associated with good agricultural practices. Water quality and its physicochemical characteristics are important factors to consider, as its quality directly impacts the efficiency of phytosanitary products. Thus, the goal of this research was to study the influence of the storage time of syrup, performed in three collection points in Jataí - GO city, on the efficacy of glyphosate herbicide in sugarcane drying. The waters were collected in two years, but in the same season (2017 and 2018) and in the same places. All water samples were subjected to physicochemical analysis, alkalinity, chloride and iron content, electrical conductivity, pH and hardness of the samples were evaluated. For the field experiment the experimental design was randomized blocks, in a 3 x 4 factorial scheme with an additional plot (control), and five replications. The first factor is composed of water collected at the three collection points adopted by the Raízen Mill and the second factor was composed of four storage periods (12, 8, 4, 0 days). Four evaluations were made at 15, 30, 45 and 60 days after application. Data were subjected to analysis of variance, and when necessary followed by comparison of means by the Tukey test at 5%. From the results obtained, it is concluded that the waters collected in the three points of uptake present different physicochemical characteristics. In both experiments, it was observed that the efficacy of control of sugarcane knuckles is little influenced by the storage periods of herbicides with glyphosate and that the waters from the 3 points of uptake presented little or no influence on the efficacy of control of sugar cane caps.
