Qualidade da água utilizada para pulverização agrícola

Abstract

The use of water in agricultural spraying can cause the low integrity of the physico-chemical characteristics. The objective of this work is to analyze a water quality in the municipalities of Jacutinga and Ponte Preta in the northern region of Rio Grande do Sul, and a recipe for the contamination of pesticides via the surface and water table, and greater efficiency of pesticides applied to agricultural spraying. Biweekly samples of water were collected during the months of January to August of 2016. Being the pure water base as analyzes of pH, electrical conductivity and water hardness, and in the premixtures of pesticides carried out in the laboratory of Fronteira Sul Federal University, being made as samples of pH and electrical conduit. (1) insecticidacipermethrin: (2) fungicide-epoxiconazole; (3) insecticide-cypermethrin + fungicide-epoxiconazole; (4) herbicide-glyphosate; (5) herbicide-2,4 D; (6) herbicide-glyphosate + herbicide-2,4 D; (7) herbicide-glyphosate + insecticide-cypermethrin; (8) herbicide-glyphosate + Fungicide-Epoxiconazole; (9) herbicide-glyphosate + insecticide-cypermethrin + fungicide-epoxiconazole; (10) herbicide-glyphosate + herbicide-2,4 D + insecticide-cypermethrin + fungicide-epoxiconazole. 50 mL of water without laboratory water was used for a preparation of the water quality analyzes, and triplicate for a determination. The design was completely randomized, with three replicates. It was concluded that in the analysis of pure water quality there were no variations without period evaluated. In Table 1, the evaluation of electrical conductivity, the insecticide cypermethrin had differences in source as sources and in the composition of pesticides, or fungicide epoxiconazole had difference between as water sources. And in its mixture between the insecticide cypermethrin and the fungicide epoxiconazole had difference between as water sources, already glyphosate herbicides and the 2,4 D acid reduced drastically the electrical conductivity. In table 2 of the evaluation of pH or insecticide cypermethrin, there was no differentiation as sources and in the composition of pesticides, already fungicide epoxiconazole there was variation between a composition of pesticides. In relation to the mixture of cypermethrin and epoxiconazole there was no difference between sources and or composition of the pesticides in the treatments, according to the variations between a composition of the individual pesticides and their mixture.