DIEIMISSON PAULO ALMEIDA
Abstract:
In areas where no-tillage is used, it's common to observe defects in the desiccation of cover crops and/or spontaneous vegetation, which may characterize the insufficient deposition of the active ingredient of the herbicide. Application technology is the tool to be used in the planning and execution of desiccation to ensure that products with proven weed control and mulching efficiency are efficiently deposited on biological targets. In order to maximize herbicide effectiveness through efficient applications, two experiments were performed. In the first one, the influence of droplet classes (very fine droplets and very coarse droplets) and application volumes (50, 100, 150 and 200 L ha-1) on the control of cover crops was evaluated using glyphosate and glyphosate + saflufenacil for control of Urochloa ruziziensis and Conyza sp. respectively, in which it was concluded that the droplet classes influence the control of Urochloa ruziziensis and the reduction of the application volume increases the possibility of Conyza sp. regrowth efficiency of application in two application volumes (50 and 200 L ha-1) at different times of day (4:30, 10:30, 16:30 and 22:30 hours) in the desiccation of Urochloa ruziziensis and spontaneous vegetation. It was concluded that the efficacy of glyphosate in the vegetable coverings is not influenced by application times.
