Fertiactyl Pós® as eucalyptus shield submitted the application of glyphosate

Abstract

The use of antidotes capable of protecting eucalypt damage caused by glyphosate herbicide that allows changes in application techniques, making them simpler and cheaper operations. In this sense, the objective was to evaluate the protective effect of Fertiactyl Pós® on eucalypt plants submitted the application of glyphosate. The experiment was conducted in a completely randomized design with four replications in a factorial 5 x 5, and the factors dose Fertiactyl Pós® (0, 1, 2, 4 and 8 L ha-1) and glyphosate (0, 90, 180, 360 and 720 g ha-1). The treatments were applied such that the sprayed herbicide to reach all eucalypt plant. Physiological evaluations were carried out in the eucalypt at 10, 33 and 55 days after application (DAA). At 56 DAA, evaluated the leaf area, the content of nutrients in the leaves and dry mass of shoots and roots of eucalypt. Using the Fertiactyl Pós® were not observed visual effects of gyphosate in eucalypt in any of the evaluated doses. The application of the highest dose of glyphosate in mixture with 0.56 L ha-1 Fertiactyl Pós® resulted in estimated total dry matter equal to the control plants and 6.6% more than the use of 720 g ha-1 of glyphosate without Fertiactyl Pós®. The use of Fertiactyl Pós® was effective in reducing the damage glyphosate applied in eucalypt plants, however, at high doses, this product can damage this culture.