Abstract: Background: The effects of applying herbicides in a mixture with foliar fertilizers on soybeans are extremely important for successful production. Objective: To evaluate the effect of glyphosate formulations applied in mixture with sulphate fertilizers on the soybean crop. Methods: The experiment was conducted in a randomized block design with four replications. The treatments were arranged in a 4 × 3 factorial scheme, with three glyphosate formulations: Roundup WG, Roundup Ultra and Glizmax, plus a weeded control. The second factor […]

Abstract Introduction Obtaining good results in the no-tillage system is directly related to the adequate management of cover crops, combined with an efficient chemical control of weeds, involving residual herbicides. Objective To evaluate the effectiveness and selectivity of two mixtures of residual herbicide molecules (imazethapyr + flumioxazin and imazethapyr + saflufenacil) in different cover crops in soybean cultivated in the plant-apply system. Methods A completely randomized design was used, in a 3×3 factorial scheme, consisting of nine treatments and four […]

The residual herbicides in the soil can be influenced by several factors, including soil compaction. The objective of this study was to evaluate the influence of soil compaction on selectivity of diclosulam to soybean, as well as the carryover effect on the corn in succession. The experiment was carried out in clay and sandy soil. The experimental design was in a randomized block with four replicates. The treatments were arranged in a 3×3 factorial scheme, where A factor was level […]

In order to bypass cases of glyphosate-resistant weeds, it becomes necessary to use herbicides with other action mechanisms. The goal of this work was to evaluate the effectiveness and selectivity of herbicides with isolated or tank mix application for the management of soybean-infesting glyphosate-resistant weeds. Treatments were applied sequentially, during pre-emergence: clomazone (900 g ha-1 a.i.); flumioxazin (50 g ha-1 a.i.); diclosulam (35.02 g ha-1 a.i.); s-metolachlor (1152 g ha-1 a.i.); sulfometuron + chlorimuron-ethyl (18.75 + 18.75 g ha-1 a.i.); […]

The introduction of new cultivation technologies for soybean, corn and cotton contributed to a significant increase in the productivity of these crops. A highlight among these technological advances is the resistance of these crops to glyphosate, which initially provided for better weed control, especially in areas with a great diversity of species. Additionally, from a practical point of view it can also be highlighted that the increased time span for weed control, looking at the possibility of applying glyphosate at […]

With the introduction of transgenic soybean resistant to glyphosate, which was widespread in southern Brazil, the number of applications and the selection of biotypes of horseweed (Conyza bonariensis) resistant to herbicide have stepped up. Thus, new chemical alternatives are essential for the efficient control of horseweed. Thus, the aim of this study was to evaluate the effectiveness of cloransulam-methyl (PactoTM), applied in postemergence, in controlling C. bonariensis and SYN 1059 RR VtopTM soybean yield. The experiment was conducted in the […]